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1. Non-stoichiometric amorphous magnesium-iron silicates in circumstellar dust shells. Dust growth in outflows from supergiants

Author

Gail, Hans-Peter, Tamanai, Akemi, Pucci, Annemarie, and Dohmen, Ralf

Subjects
Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies
Abstract

We investigate the dust growth in oxygen-rich stellar outflows for a set of nine well-observed massive supergiants with optically thin dust shells. Models of the infrared emission from their circumstellar dust shells are compared to their observed infrared spectra so as to derive the essential parameters that govern dust formation in the extended envelope of these stars. The results obtained from the comparative study are also compared with the predictions of a model for silicate dust condensation solely based on laboratory data and basic stellar properties. The infrared emission in the wavelength range between 6 and 25 mu can be reproduced rather well by a mixture of non-stoichiometric iron-bearing silicates, alumina, and metallic iron dust particles for all nine objects. The observed spectra obtained from three objects, mu Cep, RW Cyg, and RS Per, can be reproduced by a stationary and (essentially) spherically symmetric outflow which enables a direct comparison with predictions from a theoretical dust growth model. The temperature at the onset of massive silicate dust growth is of the order of 920 K and the corresponding outflow velocity of the order of the sound velocity for these objects. The condensation temperature suggests that the silicate dust grows on the corundum dust grains that are formed well in the interior of the silicate dust shell at a much higher temperature. Our results propose that regarding the two major problems of dust formation in stellar outflows: (i) formation of seed nuclei; (ii) their growth to macroscopic dust grains, we are gradually coming close to a quantitative understanding of the second item., Comment: 29 pages, 9 figures, accepted by Astronomy & Astrophysics

Published
2020
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2. Self-Organized Nanorod Arrays for Large-Area Surface-Enhanced Infrared Absorption

Author

Giordano, Maria Caterina, Tzschoppe, Michael, Barelli, Matteo, Vogt, Jochen, Huck, Christian, Canepa, Filippo, Pucci, Annemarie, and de Mongeot, Francesco Buatier

Subjects
Physics - Applied Physics, Condensed Matter - Materials Science
Abstract

Capabilities of highly sensitive surface-enhanced infrared absorption (SEIRA) spectroscopy are demonstrated by exploiting large-area templates ($cm^2$) based on self-organized (SO) nanorod antennas. We engineered highly dense arrays of gold nanorod antennas featuring polarization-sensitive localized plasmon resonances, tunable over a broadband near- and mid-infrared (IR) spectrum, in overlap with the so-called 'functional group' window. We demonstrate polarization-sensitive SEIRA activity, homogeneous over macroscopic areas and stable in time, by exploiting prototype self-assembled monolayers of IR-active octadecanthiol (ODT) molecules. The strong coupling between the plasmonic excitation and molecular stretching modes gives rise to characteristic Fano resonances in SEIRA. The SO engineering of the active hotspots in the arrays allows us to achieve signal amplitude improved up to 5.7%. This figure is competitive to the response of lithographic nanoantennas and is stable when the optical excitation spot varies from the micro- to macroscale, thus enabling highly sensitive SEIRA spectroscopy with cost-effective nanosensor devices., Comment: 28+8 pages, 3+5 figures

Published
2020
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3. Optical properties of non-stoichiometric amorphous silicates with application to circumstellar dust extinction

Author

Tamanai, Akemi, Pucci, Annemarie, Dohmen, Ralf, and Gail, Hans-Peter

Subjects
Astrophysics - Solar and Stellar Astrophysics
Abstract

Optical constants of non-stoichiometric amorphous magnesium-iron silicates are determined. It is demonstrated that these can well reproduce the observed mid-infrared emission spectra of evolved stars. Stoichiometric and non-stoichiometric amorphous magnesium-iron silicate films are fabricated by pulsed laser deposition. Transmittance and ellipsometry measurements are performed in the wavelength range between 2 and 200 $\mu$m and 1.7 and 33 $\mu$m, respectively. Optical constants are derived from transmittance and ellipsometric $\Psi$ and $\Delta$ spectra by means of oscillator models. The optical constants are applied in radiative transfer models for examining reproducibility of the observed spectral features of circumstellar dust shells around supergiants. The spectra of four selected supergiants are dominated by amorphous silicate dust emission in the wavelength range of 9 and 25 $\mu$m. To obtain a good fit to the observed spectra, we take into account amorphous corundum and metallic iron particles as additional dust components to account for dust emission at $\lambda<8 \mu$m and in between the two silicate features. For each of the objects, a set of model parameters (dust mass, condensation temperature) is derived by an automated optimization procedure which well reproduces the observation. Consequently, our model spectra using the new optical data find that the silicate bands at $\approx 10$ and $\approx 18 \mu$m depend on the magnesium and iron ratio in the silicate system, and that a good fit requires a significant iron content of the amorphous silicate dust component to reproduce the observed peak positions and shape of the silicate bands., Comment: 23 pages, 13 figures, accepted by Astrophysical Journal

Published
2017
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4. Optical Phonons in Methylammonium Lead Halide Perovskites and Implications for Charge Transport

Author

Sendner, Michael, Nayak, Pabitra K., Egger, David A., Beck, Sebastian, Müller, Christian, Epding, Bernd, Kowalsky, Wolfgang, Kronik, Leeor, Snaith, Henry J., Pucci, Annemarie, and Lovrinčić, Robert

Subjects
Condensed Matter - Materials Science
Abstract

Lead-halide perovskites are promising materials for opto-electronic applications. Recent reports indicated that their mechanical and electronic properties are strongly affected by the lattice vibrations. Herein we report far-infrared spectroscopy measurements of CH$_{3}$NH$_{3}$Pb(I/Br/Cl)$_{3}$ thin films and single crystals at room temperature and a detailed quantitative analysis of the spectra. We find strong broadening and anharmonicity of the lattice vibrations for all three halide perovskites, which indicates dynamic disorder of the lead-halide cage at room temperature. We determine the frequencies of the transversal and longitudinal optical phonons, and use them to calculate, via appropriate models, the static dielectric constants, polaron masses, electron-phonon coupling constants, and upper limits for the phonon-scattering limited charge carrier mobilities. Within the limitations of the model used, we can place an upper limit of 200$\,$cm$^{2}$V$^{-1}$s$^{-1}$ for the room temperature charge carrier mobility in MAPbI$_{3}$ single crystals. Our findings are important for the basic understanding of charge transport processes and mechanical properties in metal halide perovskites.

Published
2016
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5. Silicate condensation in Mira variables

Author

Gail, Hans-Peter, Scholz, Michael, and Pucci, Annemarie

Subjects
Astrophysics - Solar and Stellar Astrophysics
Abstract

We study whether the condensation of silicate dust in Mira envelopes could be caused by cluster formation by the abundant SiO molecules. For a simplified model of the pulsational motions of matter in the the outer layers of a Mira variable which is guided by a numerical model for Mira pulsations, the equations of dust nucleation and growth are solved in the co-moving frame of a fixed mass element. It is assumed that seed particles form by clustering of SiO molecules. The calculation of the nucleation rate is based on the experimental data of Nuth and Donn (1982). The quantity of dust formed is calculated by a moment method and the calculation of radiation pressure on the dusty gas is based on a dirty silicate model. Dust nucleation occurs in the model at the upper culmination of the trajectory of a gas parcel where it stays for a considerable time at low temperatures while subsequent dust growth occurs during the descending part of the motion and continues after the next shock reversed motion. It is found that sufficient dust forms that radiation pressure exceeds gravitational pull of the stars such that the mass element is finally driven out of the star. Nucleation of dust particles by clustering of the abundant SiO molecules could be the mechanism that triggers silicate dust formation in Miras., Comment: 7 pages, 5 figures, accepted by Astronomy & Astrophysics

Published
2016
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6. Compensation of Oxygen Doping in p‐Type Organic Field‐Effect Transistors Utilizing Immobilized n‐Dopants

Author

Barf, Marc‐Michael, Benneckendorf, Frank S., Reiser, Patrick, Bäuerle, Rainer, Köntges, Wolfgang, Müller, Lars, Pfannmöller, Martin, Beck, Sebastian, Mankel, Eric, Freudenberg, Jan, Jänsch, Daniel, Tisserant, Jean‐Nicolas, Lovrincic, Robert, Schröder, Rasmus R., Bunz, Uwe H. F., Pucci, Annemarie, Jaegermann, Wolfram, Kowalsky, Wolfgang, Müllen, Klaus, Barf, Marc‐Michael, Benneckendorf, Frank S., Reiser, Patrick, Bäuerle, Rainer, Köntges, Wolfgang, Müller, Lars, Pfannmöller, Martin, Beck, Sebastian, Mankel, Eric, Freudenberg, Jan, Jänsch, Daniel, Tisserant, Jean‐Nicolas, Lovrincic, Robert, Schröder, Rasmus R., Bunz, Uwe H. F., Pucci, Annemarie, Jaegermann, Wolfram, Kowalsky, Wolfgang, and Müllen, Klaus

Abstract

Poly(3‐hexyl‐thiophene‐2,5‐diyl) (P3HT) is one of the most commonly used materials in organic electronics, yet it is considered to be rather unattractive for organic field‐effect transistors (OFETs) due to its tendency to oxidize under aerobic conditions. Strong p‐doping of P3HT by oxygen causes high off‐currents in such devices opposing the desired high on/off‐ratios. Herein, a new application‐oriented method involving the recently developed immobilizable organic n‐dopant 2‐(2‐((4‐azidobenzyl)oxy)phenyl)‐1,3‐dimethyl‐2,3‐dihydro‐1H‐benzoimidazol (o‐AzBnO‐DMBI) is presented allowing to process and operate P3HT OFETs in air. The n‐dopants compensate oxygen doping by trapping generated free holes, thereby rediminishing OFET off‐currents by approximately two orders of magnitude. At the same time, field‐effect mobilities remain high in the order of up to 0.19 cm² V⁻¹ s⁻¹. Due to the covalent attachment of the dopants to the host matrix after photochemical activation, a drift of the otherwise mobile ions within the device is prevented even at high operating voltages and, thus, hysteresis in the corresponding transfer characteristics is kept low. In this manner, the air instability of P3HT OFETs is successfully resolved paving an auspicious way toward OFET mass production. As the immobilization process employed here is nonspecific with respect to the host material, this strategy is transferable to other p‐type semiconductors.

Published
2024

7. Analytical Study of Solution‐Processed Tin Oxide as Electron Transport Layer in Printed Perovskite Solar Cells

Author

Rohnacher, Valentina, Ullrich, Florian, Eggers, Helge, Schackmar, Fabian, Hell, Sebastian, Salazar, Adriana, Huck, Christian, Hernandez‐Sosa, Gerardo, Paetzold, Ulrich W., Jaegermann, Wolfram, Pucci, Annemarie, Rohnacher, Valentina, Ullrich, Florian, Eggers, Helge, Schackmar, Fabian, Hell, Sebastian, Salazar, Adriana, Huck, Christian, Hernandez‐Sosa, Gerardo, Paetzold, Ulrich W., Jaegermann, Wolfram, and Pucci, Annemarie

Abstract

Solution‐processed tin oxide (SnOₓ) electron transport layers demonstrate excellent performance in various optoelectronic devices and offer the ease of facile and low cost deposition by various printing techniques. The most common precursor solution for the preparation of SnOₓ thin films is SnCl₂ dissolved in ethanol. In order to elucidate the mechanism of the precursor conversion at different annealing temperatures and the optoelectronic performance of the SnOₓ electron transport layer, phonon and vibrational infrared and photoelectron spectroscopies as well as atomic force microscopy are used to probe the chemical, physical, and morphological properties of the SnOₓ thin films. The influence of two different solvents on the layer morphology of SnOₓ thin films is investigated. In both cases, an increasing annealing temperature not only improves the structural and chemical properties of solution‐processed SnOₓ, but also reduces the concentration of tin hydroxide species in the bulk and on the surface of these thin films. As a prototypical example for the high potential of printed SnOₓ layers for solar cells, high performance perovskite solar cells with a stabilized power conversion efficiency of over 15% are presented.

Published
2024

8. Laboratory measurement of optical constants of solid SiO and application to circumstellar dust

Author

Wetzel, Steffen, Klevenz, Markus, Gail, Hans-Peter, Pucci, Annemarie, and Trieloff, Mario

Subjects
Astrophysics - Solar and Stellar Astrophysics
Abstract

Silicate minerals belong to the most abundant solids in space. Their formation becomes difficult at the transition from the oxygen rich chemistry of M-stars to the carbon rich chemistry of C-stars. In the intermediate type S-stars oxygen and carbon are consumed by CO and SiO molecule formation, and left-over oxygen to build the SiO4-tetrahedra of silicates becomes scarce. Then SiO molecules may directly condense into solid SiO. The IR absorption spectrum of solid SiO differs from that of silicates by the absence of Si-O-Si bending modes at 18 mum while the absorption by Si-O bond stretching modes at 10 mum is present. Such characteristics are observed in a number of S-star spectra. We suggest that this observation may be explained by formation of solid SiO as a major dust component at C/O abundance ratios close to unity. We determine the IR absorption properties of solid SiO by laboratory transmission measurements of thin SiO films produced by vapour deposition on a Si(111) wafer. From the measured spectra the dielectric function of SiO is derived. The results are used in model calculations of radiative transfer in circumstellar dust shells with solid SiO dust. Comparison of synthetic and observed spectra shows that reasonable agreement is obtained between the main spectral characteristics of emission bands due to solid SiO and an emission band centred on 10 mum, but without accompanying 18 mum band, observed in some S-stars. We propose that solid SiO is the carrier material of this 10 mum spectral feature.

Published
2012
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25. Beyond p‐Hexaphenylenes: Synthesis of Unsubstituted p‐Nonaphenylene by a Precursor Protocol

Author

Abdulkarim, Ali, primary, Nathusius, Marvin, additional, Bäuerle, Rainer, additional, Strunk, Karl‐Philipp, additional, Beck, Sebastian, additional, Räder, Hans Joachim, additional, Pucci, Annemarie, additional, Melzer, Christian, additional, Jänsch, Daniel, additional, Freudenberg, Jan, additional, Bunz, Uwe H. F., additional, and Müllen, Klaus, additional

Published
2020
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26. Compensation of Oxygen Doping in p‐Type Organic Field‐Effect Transistors Utilizing Immobilized n‐Dopants

Author

Barf, Marc‐Michael, primary, Benneckendorf, Frank S., additional, Reiser, Patrick, additional, Bäuerle, Rainer, additional, Köntges, Wolfgang, additional, Müller, Lars, additional, Pfannmöller, Martin, additional, Beck, Sebastian, additional, Mankel, Eric, additional, Freudenberg, Jan, additional, Jänsch, Daniel, additional, Tisserant, Jean‐Nicolas, additional, Lovrincic, Robert, additional, Schröder, Rasmus R., additional, Bunz, Uwe H. F., additional, Pucci, Annemarie, additional, Jaegermann, Wolfram, additional, Kowalsky, Wolfgang, additional, and Müllen, Klaus, additional

Published
2020
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27. Analytical Study of Solution‐Processed Tin Oxide as Electron Transport Layer in Printed Perovskite Solar Cells

Author

Rohnacher, Valentina, primary, Ullrich, Florian, additional, Eggers, Helge, additional, Schackmar, Fabian, additional, Hell, Sebastian, additional, Salazar, Adriana, additional, Huck, Christian, additional, Hernandez‐Sosa, Gerardo, additional, Paetzold, Ulrich W., additional, Jaegermann, Wolfram, additional, and Pucci, Annemarie, additional

Published
2020
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28. Functionalized Tetrapodal Diazatriptycenes for Electrostatic Dipole Engineering in n‐Type Organic Thin Film Transistors

Author

Rohnacher, Valentina, primary, Benneckendorf, Frank S., additional, Münch, Maybritt, additional, Sauter, Eric, additional, Asyuda, Andika, additional, Barf, Marc‐Michael, additional, Tisserant, Jean‐Nicolas, additional, Hillebrandt, Sabina, additional, Rominger, Frank, additional, Jänsch, Daniel, additional, Freudenberg, Jan, additional, Kowalsky, Wolfgang, additional, Jaegermann, Wolfram, additional, Bunz, Uwe H. F., additional, Pucci, Annemarie, additional, Zharnikov, Michael, additional, and Müllen, Klaus, additional

Published
2020
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29. Electron-Beam Irradiation of Cinnamate Films Affords Nanoscale Patterned Substrates for Use in Devices and as Scaffolds in Tissue Engineering

Author

Strunk, Karl-Philipp, primary, Bojanowski, N. Maximilian, additional, Huck, Christian, additional, Bender, Markus, additional, Veith, Lisa, additional, Tzschoppe, Michael, additional, Freudenberg, Jan, additional, Wacker, Irene, additional, Schröder, Rasmus R., additional, Pucci, Annemarie, additional, Melzer, Christian, additional, and Bunz, Uwe H. F., additional

Published
2020
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30. Present and future of surface-enhanced raman scattering

Author

European Research Council, European Commission, Eusko Jaurlaritza, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Ministerio de Economía y Competitividad (España), Engineering and Physical Sciences Research Council (UK), Danish National Research Foundation, Villum Fonden, National Research Foundation of Korea, German Research Foundation, Biotechnology and Biological Sciences Research Council (UK), National Science Foundation (US), Knut and Alice Wallenberg Foundation, Office of Naval Research (US), Royal Society of New Zealand, Ministry of Education (Singapore), Ministry of Science, ICT and Future Planning (South Korea), National Natural Science Foundation of China, Langer, Judith, Jimenez de Aberasturi, Dorleta, Aizpurua, Javier, Alvarez Puebla, Ramón A., Auguié, Baptiste, Baumberg, Jeremy J., Bazan, Guillermo C., Bell, Steven, Boisen, Anja, Brolo, Alexandre G., Choo, Jaebum, Cialla-May, Dana, Deckert, Volker, Fabris, Laura, Faulds, Karen, García de Abajo, Francisco Javier, Goodacre, Roy, Graham, Duncan, Haes, Amanda J., Haynes, Christy L., Huck-Iriart, Cristián, Itoh, Tamitake, Käll, Mikael, Kneipp, Janina, Kotov, Nicholas A., Kuang, Hua, Le Ru, Eric C., Kwee Lee, Hiang, Li, Jian, Ling, Xing Yi, Maier, Stefan A., Mayerhöfer, Thomas, Moskovits, Martin, Murakoshi, Kei, Nam, Jwa-Min, Nie, Shuming, Oazki, Yukihiro, Pastoriza-Santos, Isabel, Pérez‐Juste, Jorge, Popp, Jürgen, Pucci, Annemarie, Reich, Stephanie, Ren, Bin, Schatz, George, Shegai, Timur, Schlücker, Sebastian, Li-Lin, Tay, Thomas, K. George, Tian, Zhong-Qun, Van Duyne, Richard, Vo-Dinh, Tuan, Wang, Yue, Willets, Katherine, Xu, Chuanlai, Xu, Hongxing, Xu, Yikai, Yamamoto, Yuko S., Zhao, Bing, Liz-Marzán, Luis Manuel, European Research Council, European Commission, Eusko Jaurlaritza, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Ministerio de Economía y Competitividad (España), Engineering and Physical Sciences Research Council (UK), Danish National Research Foundation, Villum Fonden, National Research Foundation of Korea, German Research Foundation, Biotechnology and Biological Sciences Research Council (UK), National Science Foundation (US), Knut and Alice Wallenberg Foundation, Office of Naval Research (US), Royal Society of New Zealand, Ministry of Education (Singapore), Ministry of Science, ICT and Future Planning (South Korea), National Natural Science Foundation of China, Langer, Judith, Jimenez de Aberasturi, Dorleta, Aizpurua, Javier, Alvarez Puebla, Ramón A., Auguié, Baptiste, Baumberg, Jeremy J., Bazan, Guillermo C., Bell, Steven, Boisen, Anja, Brolo, Alexandre G., Choo, Jaebum, Cialla-May, Dana, Deckert, Volker, Fabris, Laura, Faulds, Karen, García de Abajo, Francisco Javier, Goodacre, Roy, Graham, Duncan, Haes, Amanda J., Haynes, Christy L., Huck-Iriart, Cristián, Itoh, Tamitake, Käll, Mikael, Kneipp, Janina, Kotov, Nicholas A., Kuang, Hua, Le Ru, Eric C., Kwee Lee, Hiang, Li, Jian, Ling, Xing Yi, Maier, Stefan A., Mayerhöfer, Thomas, Moskovits, Martin, Murakoshi, Kei, Nam, Jwa-Min, Nie, Shuming, Oazki, Yukihiro, Pastoriza-Santos, Isabel, Pérez‐Juste, Jorge, Popp, Jürgen, Pucci, Annemarie, Reich, Stephanie, Ren, Bin, Schatz, George, Shegai, Timur, Schlücker, Sebastian, Li-Lin, Tay, Thomas, K. George, Tian, Zhong-Qun, Van Duyne, Richard, Vo-Dinh, Tuan, Wang, Yue, Willets, Katherine, Xu, Chuanlai, Xu, Hongxing, Xu, Yikai, Yamamoto, Yuko S., Zhao, Bing, and Liz-Marzán, Luis Manuel

Abstract

The discovery of the enhancement of Raman scattering by molecules adsorbed on nanostructured metal surfaces is a landmark in the history of spectroscopic and analytical techniques. Significant experimental and theoretical effort has been directed toward understanding the surface-enhanced Raman scattering (SERS) effect and demonstrating its potential in various types of ultrasensitive sensing applications in a wide variety of fields. In the 45 years since its discovery, SERS has blossomed into a rich area of research and technology, but additional efforts are still needed before it can be routinely used analytically and in commercial products. In this Review, prominent authors from around the world joined together to summarize the state of the art in understanding and using SERS and to predict what can be expected in the near future in terms of research, applications, and technological development. This Review is dedicated to SERS pioneer and our coauthor, the late Prof. Richard Van Duyne, whom we lost during the preparation of this article.

Published
2020

31. Present and Future of Surface-Enhanced Raman Scattering

Author

Langer, Judith, Jimenez De Aberasturi, Dorleta, Aizpurua, Javier, Alvarez-Puebla, Ramon A., Auguié, Baptiste, Baumberg, Jeremy J., Bazan, Guillermo C., Bell, Steven E.J., Boisen, Anja, Brolo, Alexandre G., Choo, Jaebum, Cialla-May, Dana, Deckert, Volker, Fabris, Laura, Faulds, Karen, García De Abajo, F. Javier, Goodacre, Royston, Graham, Duncan, Haes, Amanda J., Haynes, Christy L., Huck, Christian, Itoh, Tamitake, Käll, Mikael, Kneipp, Janina, Kotov, Nicholas A., Kuang, Hua, Le Ru, Eric C., Lee, Hiang Kwee, Li, Jian Feng, Ling, Xing Yi, Maier, Stefan A., Mayerhöfer, Thomas, Moskovits, Martin, Murakoshi, Kei, Nam, Jwa Min, Nie, Shuming, Ozaki, Yukihiro, Pastoriza-Santos, Isabel, Perez-Juste, Jorge, Popp, Juergen, Pucci, Annemarie, Reich, Stephanie, Ren, Bin, Schatz, George C., Shegai, Timur, Schlücker, Sebastian, Tay, Li Lin, Thomas, K. George, Tian, Zhong Qun, Van Duyne, Richard P., Vo-Dinh, Tuan, Wang, Yue, Willets, Katherine A., Xu, Chuanlai, Xu, Hongxing, Xu, Yikai, Yamamoto, Yuko S., Zhao, Bing, Liz-Marzán, Luis M., Langer, Judith, Jimenez De Aberasturi, Dorleta, Aizpurua, Javier, Alvarez-Puebla, Ramon A., Auguié, Baptiste, Baumberg, Jeremy J., Bazan, Guillermo C., Bell, Steven E.J., Boisen, Anja, Brolo, Alexandre G., Choo, Jaebum, Cialla-May, Dana, Deckert, Volker, Fabris, Laura, Faulds, Karen, García De Abajo, F. Javier, Goodacre, Royston, Graham, Duncan, Haes, Amanda J., Haynes, Christy L., Huck, Christian, Itoh, Tamitake, Käll, Mikael, Kneipp, Janina, Kotov, Nicholas A., Kuang, Hua, Le Ru, Eric C., Lee, Hiang Kwee, Li, Jian Feng, Ling, Xing Yi, Maier, Stefan A., Mayerhöfer, Thomas, Moskovits, Martin, Murakoshi, Kei, Nam, Jwa Min, Nie, Shuming, Ozaki, Yukihiro, Pastoriza-Santos, Isabel, Perez-Juste, Jorge, Popp, Juergen, Pucci, Annemarie, Reich, Stephanie, Ren, Bin, Schatz, George C., Shegai, Timur, Schlücker, Sebastian, Tay, Li Lin, Thomas, K. George, Tian, Zhong Qun, Van Duyne, Richard P., Vo-Dinh, Tuan, Wang, Yue, Willets, Katherine A., Xu, Chuanlai, Xu, Hongxing, Xu, Yikai, Yamamoto, Yuko S., Zhao, Bing, and Liz-Marzán, Luis M.

Abstract

The discovery of the enhancement of Raman scattering by molecules adsorbed on nanostructured metal surfaces is a landmark in the history of spectroscopic and analytical techniques. Significant experimental and theoretical effort has been directed toward understanding the surface-enhanced Raman scattering (SERS) effect and demonstrating its potential in various types of ultrasensitive sensing applications in a wide variety of fields. In the 45 years since its discovery, SERS has blossomed into a rich area of research and technology, but additional efforts are still needed before it can be routinely used analytically and in commercial products. In this Review, prominent authors from around the world joined together to summarize the state of the art in understanding and using SERS and to predict what can be expected in the near future in terms of research, applications, and technological development. This Review is dedicated to SERS pioneer and our coauthor, the late Prof. Richard Van Duyne, whom we lost during the preparation of this article.

Published
2020

32. AFM-IR and IR-SNOM for the Characterization of Small Molecule Organic Semiconductors

Author

Rao, Vaishnavi J., primary, Matthiesen, Maik, additional, Goetz, Katelyn P., additional, Huck, Christian, additional, Yim, Chanyoung, additional, Siris, Rita, additional, Han, Jie, additional, Hahn, Sebastian, additional, Bunz, Uwe H. F., additional, Dreuw, Andreas, additional, Duesberg, Georg S., additional, Pucci, Annemarie, additional, and Zaumseil, Jana, additional

Published
2020
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36. Tetrapodal Diazatriptycene Enforces Orthogonal Orientation in Self-Assembled Monolayers

Author

Benneckendorf, Frank S., primary, Rohnacher, Valentina, additional, Sauter, Eric, additional, Hillebrandt, Sabina, additional, Münch, Maybritt, additional, Wang, Can, additional, Casalini, Stefano, additional, Ihrig, Katharina, additional, Beck, Sebastian, additional, Jänsch, Daniel, additional, Freudenberg, Jan, additional, Jaegermann, Wolfram, additional, Samorì, Paolo, additional, Pucci, Annemarie, additional, Bunz, Uwe H. F., additional, Zharnikov, Michael, additional, and Müllen, Klaus, additional

Published
2019
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38. Present and Future of Surface-Enhanced Raman Scattering

Author

Langer, Judith, primary, Jimenez de Aberasturi, Dorleta, additional, Aizpurua, Javier, additional, Alvarez-Puebla, Ramon A., additional, Auguié, Baptiste, additional, Baumberg, Jeremy J., additional, Bazan, Guillermo C., additional, Bell, Steven E. J., additional, Boisen, Anja, additional, Brolo, Alexandre G., additional, Choo, Jaebum, additional, Cialla-May, Dana, additional, Deckert, Volker, additional, Fabris, Laura, additional, Faulds, Karen, additional, García de Abajo, F. Javier, additional, Goodacre, Royston, additional, Graham, Duncan, additional, Haes, Amanda J., additional, Haynes, Christy L., additional, Huck, Christian, additional, Itoh, Tamitake, additional, Käll, Mikael, additional, Kneipp, Janina, additional, Kotov, Nicholas A., additional, Kuang, Hua, additional, Le Ru, Eric C., additional, Lee, Hiang Kwee, additional, Li, Jian-Feng, additional, Ling, Xing Yi, additional, Maier, Stefan A., additional, Mayerhöfer, Thomas, additional, Moskovits, Martin, additional, Murakoshi, Kei, additional, Nam, Jwa-Min, additional, Nie, Shuming, additional, Ozaki, Yukihiro, additional, Pastoriza-Santos, Isabel, additional, Perez-Juste, Jorge, additional, Popp, Juergen, additional, Pucci, Annemarie, additional, Reich, Stephanie, additional, Ren, Bin, additional, Schatz, George C., additional, Shegai, Timur, additional, Schlücker, Sebastian, additional, Tay, Li-Lin, additional, Thomas, K. George, additional, Tian, Zhong-Qun, additional, Van Duyne, Richard P., additional, Vo-Dinh, Tuan, additional, Wang, Yue, additional, Willets, Katherine A., additional, Xu, Chuanlai, additional, Xu, Hongxing, additional, Xu, Yikai, additional, Yamamoto, Yuko S., additional, Zhao, Bing, additional, and Liz-Marzán, Luis M., additional

Published
2019
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40. Small Change, Big Impact: The Shape of Precursor Polymers Governs Poly-p-phenylene Synthesis

Author

Abdulkarim, Ali, primary, Strunk, Karl-Philipp, additional, Bäuerle, Rainer, additional, Beck, Sebastian, additional, Makowska, Hanna, additional, Marszalek, Tomasz, additional, Pucci, Annemarie, additional, Melzer, Christian, additional, Jänsch, Daniel, additional, Freudenberg, Jan, additional, Bunz, Uwe H. F., additional, and Müllen, Klaus, additional

Published
2019
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41. n-Type Doping of Organic Semiconductors: Immobilization via Covalent Anchoring

Author

Reiser, Patrick, primary, Benneckendorf, Frank S., additional, Barf, Marc-Michael, additional, Müller, Lars, additional, Bäuerle, Rainer, additional, Hillebrandt, Sabina, additional, Beck, Sebastian, additional, Lovrincic, Robert, additional, Mankel, Eric, additional, Freudenberg, Jan, additional, Jänsch, Daniel, additional, Kowalsky, Wolfgang, additional, Pucci, Annemarie, additional, Jaegermann, Wolfram, additional, Bunz, Uwe H. F., additional, and Müllen, Klaus, additional

Published
2019
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42. Pristine Poly(para-phenylene): Relating Semiconducting Behavior to Kinetics of Precursor Conversion

Author

Strunk, Karl-Philipp, primary, Abdulkarim, Ali, additional, Beck, Sebastian, additional, Marszalek, Tomasz, additional, Bernhardt, Jakob, additional, Koser, Silke, additional, Pisula, Wojciech, additional, Jänsch, Daniel, additional, Freudenberg, Jan, additional, Pucci, Annemarie, additional, Bunz, Uwe H. F., additional, Melzer, Christian, additional, and Müllen, Klaus, additional

Published
2019
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45. Present and Future of Surface-Enhanced Raman Scattering

Author

Química inorgánica, Kimika ez-organikoa, Langer, Judith, Jiménez de Aberasturi Arranz, Dorleta, Aizpurua Iriazabal, Francisco Javier, Alvarez Puebla, Ramon A., Auguie, Baptiste, Baumberg, Jeremy J., Bazan, Guillermo C., Bell, Steven E. J., Boisen, Anja, Brolo, Alexandre G., Choo, Jaebum, Cialla-May, Dana, Deckert, Volker, Fabris, Laura, Faulds, Karen, García de Abajo, F. Javier, Goodacre, Royston, Graham, Duncan, Haes, Amanda J., Haynes, Christy L., Huck, Christian, Itoh, Tamitake, Kall, Mikael, Kneipp, Janina, Kotov, Nicholas A., Kuang, Hua, Le Ru, Eric C., Lee, Hiang Kwee, Li, Jian-Feng, Ling, Xing Yi, Maier, Stefan A., Mayerhofer, Thomas, Moskovits, Martin, Murakoshi, Kei, Nam, Jwa-Min, Nie, Shuming, Ozaki, Yukihiro, Pastoriza Santos, Isabel, Perez Juste, Jorge, Popp, Juergen, Pucci, Annemarie, Reich, Stephanie, Ren, Bin, Schatz, George C., Shegai, Timur, Schlucker, Sebastian, Tay, Li-Lin, Thomas, K. George, Tian, Zhong-Qun, Van Duyne, Richard P., Vo-Dinh, Tuan, Wang, Yue, Willets, Katherine A., Xu, Chuanlai, Xu, Hongxing, Xu, Yikai, Yamamoto, Yuko S., Zhao, Bing, Liz Marzán, Luis Manuel, Química inorgánica, Kimika ez-organikoa, Langer, Judith, Jiménez de Aberasturi Arranz, Dorleta, Aizpurua Iriazabal, Francisco Javier, Alvarez Puebla, Ramon A., Auguie, Baptiste, Baumberg, Jeremy J., Bazan, Guillermo C., Bell, Steven E. J., Boisen, Anja, Brolo, Alexandre G., Choo, Jaebum, Cialla-May, Dana, Deckert, Volker, Fabris, Laura, Faulds, Karen, García de Abajo, F. Javier, Goodacre, Royston, Graham, Duncan, Haes, Amanda J., Haynes, Christy L., Huck, Christian, Itoh, Tamitake, Kall, Mikael, Kneipp, Janina, Kotov, Nicholas A., Kuang, Hua, Le Ru, Eric C., Lee, Hiang Kwee, Li, Jian-Feng, Ling, Xing Yi, Maier, Stefan A., Mayerhofer, Thomas, Moskovits, Martin, Murakoshi, Kei, Nam, Jwa-Min, Nie, Shuming, Ozaki, Yukihiro, Pastoriza Santos, Isabel, Perez Juste, Jorge, Popp, Juergen, Pucci, Annemarie, Reich, Stephanie, Ren, Bin, Schatz, George C., Shegai, Timur, Schlucker, Sebastian, Tay, Li-Lin, Thomas, K. George, Tian, Zhong-Qun, Van Duyne, Richard P., Vo-Dinh, Tuan, Wang, Yue, Willets, Katherine A., Xu, Chuanlai, Xu, Hongxing, Xu, Yikai, Yamamoto, Yuko S., Zhao, Bing, and Liz Marzán, Luis Manuel

Abstract

The discovery of the enhancement of Raman scattering by molecules adsorbed on nanostructured metal surfaces is a landmark in the history of spectroscopic and analytical techniques. Significant experimental and theoretical effort has been directed toward understanding the surface-enhanced Raman scattering (SERS) effect and demonstrating its potential in various types of ultrasensitive sensing applications in a wide variety of fields. In the 45 years since its discovery, SERS has blossomed into a rich area of research and technology, but additional efforts are still needed before it can be routinely used analytically and in commercial products. In this Review, prominent authors from around the world joined together to summarize the state of the art in understanding and using SERS and to predict what can be expected in the near future in terms of research, applications, and technological development. This Review is dedicated to SERS pioneer and our coauthor, the late Prof. Richard Van Duyne, whom we lost during the preparation of this article.

Published
2019

46. How adsorbates alter the metallic behavior of quasi-1D electron systems of the Si(5 5 3)-Au surface

Author

Tzschoppe, Michael, Huck, Christian, Hötzel, Fabian, Günther, Benjamin, Mamiyev, Zamin, Butkevich, Andrey, Ulrich, Constantin, Gade, Lutz H., Pucci, Annemarie, Tzschoppe, Michael, Huck, Christian, Hötzel, Fabian, Günther, Benjamin, Mamiyev, Zamin, Butkevich, Andrey, Ulrich, Constantin, Gade, Lutz H., and Pucci, Annemarie

Abstract

The plasmonic signals of quasi-1D electron systems are a clear and direct measure of their metallic behavior. Due to the finite size of such systems in reality, plasmonic signals from a gold-induced superstructure on Si(5 5 3) can be studied with infrared spectroscopy. The infrared spectroscopic features have turned out to be extremely sensitive to adsorbates. Even without geometrical changes of the surface superstructure, the effects of doping, of the adsorbate induced electronic surface scattering, and of the electronic polarizability changes on top of the substrate surface give rise to measurable changes of the plasmonic signal. Especially strong changes of the plasmonic signal have been observed for gold, oxygen, and hydrogen exposure. The plasmonic resonance gradually disappears under these exposures, indicating the transion to an insulating behavior, which is in accordance with published results obtained from other experimental methods. For C70 and, as shown here for the first time, TAPP-Br, the plasmonic signal almost retains its original intensity even up to coverages of many monolayers. For C70, the changes of the spectral shape, e.g. of electronic damping and of the resonance position, were also found to be marginal. On the other hand, TAPP-Br adsorption shifts the plasmonic resonance to higher frequencies and strongly increases the electronic damping. Given the dispersion relation for plasmonic resonances of 1D electron systems, the findings for TAPP-Br indicate a push-back effect and therefore stronger confinement of the free charge carriers in the quasi-one-dimensonal channel due to the coverage by the flat TAPP-Br molecules. On the gold-doped Si(5 5 3)-Au surface TAPP-Br acts as counter dopant and increases the plasmonic signal.

Published
2019

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