17 results on '"NANOSTRUCTURED materials analysis"'
Search Results
2. Silicene, silicene derivatives, and their device applications.
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Molle, Alessandro, Grazianetti, Carlo, Tao, Li, Taneja, Deepyanti, Alam, Md. Hasibul, and Akinwande, Deji
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ELECTRIC properties of graphene , *NANOSTRUCTURED materials analysis , *ELECTRIC properties of nanostructured materials , *NANOSTRUCTURED materials synthesis , *NANOSTRUCTURED materials testing - Abstract
Silicene, the ultimate scaling of a silicon atomic sheet in a buckled honeycomb lattice, represents a monoelemental class of two-dimensional (2D) materials similar to graphene but with unique potential for a host of exotic electronic properties. Nonetheless, there is a lack of experimental studies largely due to the interplay between material degradation and process portability issues. This review highlights the state-of-the-art experimental progress and future opportunities in the synthesis, characterization, stabilization, processing and experimental device examples of monolayer silicene and its derivatives. The electrostatic characteristics of the Ag-removal silicene field-effect transistor exhibit ambipolar charge transport, corroborating with theoretical predictions on Dirac fermions and Dirac cone in the band structure. The electronic structure of silicene is expected to be sensitive to substrate interaction, surface chemistry, and spin–orbit coupling, holding great promise for a variety of novel applications, such as topological bits, quantum sensing, and energy devices. Moreover, the unique allotropic affinity of silicene with single-crystalline bulk silicon suggests a more direct path for the integration with or revolution to ubiquitous semiconductor technology. Both the materials and process aspects of silicene research also provide transferable knowledge to other Xenes like stanene, germanene, phosphorene, and so forth. [ABSTRACT FROM AUTHOR]
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- 2018
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3. Synthesis of hexagonal boron nitride heterostructures for 2D van der Waals electronics.
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Kim, Ki Kang, Lee, Hyun Seok, and Lee, Young Hee
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BORON nitride , *HETEROSTRUCTURES , *ELECTRIC properties of nanostructured materials , *NANOSTRUCTURED materials analysis , *NANOSTRUCTURED materials testing - Abstract
Among two dimensional (2D) van der Waals (vdW) layered materials such as graphene, which is used like a metal, and transition metal chalcogenides (TMdCs), which are used as semiconductors and metals, hexagonal boron nitride (hBN), which is used as an insulator, is ubiquitous as a building block to construct 2D vdW electronics for versatile tunneling devices. Monolayer and few-layer hBN films have been prepared with flake sizes of a few hundred micrometer via mechanical exfoliation and transfer methods. Another approach used to synthesize hBN films on a large scale is chemical vapor deposition (CVD). Although the single-crystal film growth of hBN on the wafer scale is the key to realizing realistic electronic applications, the various functionalities of hBN for 2D electronics are mostly limited to the microscale. Here, we review the recent progress for the large-area synthesis of hBN and other related vdW heterostructures via CVD, and the artificial construction of vdW heterostructures and 2D vdW electronics based on hBN, in terms of charge fluctuations, passivation, gate dielectrics, tunneling, Coulombic interactions, and contact resistances. The challenges and future perspectives for practical applications are also addressed. [ABSTRACT FROM AUTHOR]
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- 2018
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4. Preparation of 2D material dispersions and their applications.
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Cai, Xingke, Luo, Yuting, Liu, Bilu, and Cheng, Hui-Ming
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NANOSTRUCTURED materials analysis , *ELECTRIC properties of nanostructured materials , *NANOSTRUCTURED materials crystallography , *NANOSTRUCTURED materials synthesis , *NANOSTRUCTURED materials testing - Abstract
Extensive research on two-dimensional (2D) materials has triggered the renaissance of an old topic, that is, the intercalation and exfoliation of layer materials. Such top-down exfoliation produced 2D materials and their dispersions have several advantages including low cost, scalable production capability, solution processability, and versatile functionalities stemming from the large number of species of layer materials, and show promising potential in many applications. In recent years, many new methods have been developed for exfoliating layer materials to 2D materials for different application purposes. In this review the different exfoliation approaches are first systematically analyzed from the viewpoint of methodology, and the advantages and disadvantages of each method are compared. Second, the assembly of exfoliated 2D materials into macrostructures by solution-based techniques is summarized. Third, the state-of-the-art applications of 2D material dispersions and their assemblies in electronics and optoelectronics, electrocatalysis, energy storage, etc., are discussed. Finally, insights and perspectives on current research challenges and future opportunities regarding the exfoliation and applications of 2D materials in dispersions are considered. [ABSTRACT FROM AUTHOR]
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- 2018
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5. 2D nanomaterials: beyond graphene and transition metal dichalcogenides.
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Zhang, Hua, Cheng, Hui-Ming, and Ye, Peide
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NANOSTRUCTURED materials analysis , *ELECTRIC properties of nanostructured materials , *NANOSTRUCTURED materials testing , *ELECTRIC properties of graphene , *TRANSITION metal compounds - Published
- 2018
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6. Two-dimensional light-emitting materials: preparation, properties and applications.
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Wang, Zhiwei, Jingjing, Qiu, Wang, Xiaoshan, Zhang, Zhipeng, Chen, Yonghua, Huang, Xiao, and Huang, Wei
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NANOSTRUCTURED materials analysis , *NANOSTRUCTURED materials crystallography , *OPTICAL properties of nanostructured materials , *NANOSTRUCTURED materials testing , *OPTICAL properties of graphene - Abstract
The past decade has witnessed tremendous research efforts devoted to two-dimensional (2D) materials and great progress made in both their fundamental studies and technique development. 2D light-emitting materials such as transition-metal dichalcogenides (TMDs) and phosphorene are receiving particular attention as a result of their intriguing electronic, optical and optoelectronic properties. The ability to tune their layer numbers, engineer their dielectric environment, form alloys, create van der Waals heterostructures, etc. provides further means to modulate their properties which have led to a number of interesting luminescence features and potential applications in lighting, imaging and sensing. As the map of 2D materials has expanded over the past few years, 2D organic and organic–inorganic hybrid materials, such as 2D polymers, metal–organic frameworks (MOFs), and organic–inorganic hybrid perovskites, have also emerged with merits of low cost, chemical versatility and solution processibility. Importantly, the wide tunability of their functional properties is enabled by the rational design and controlled modification of their compositions and structures at the molecular level. Herein, we present a critical review of 2D light-emitting materials by categorizing them into three main groups, namely 2D inorganic light-emitting materials, 2D organic light-emitting materials, and 2D organic–inorganic hybrid light-emitting materials. Within each group, we will describe their preparation methods and discuss their structural and chemical properties. Significant emphasis will be placed on strategies that can tune their luminescence properties, and their potential applications in various fields. Finally, we will summarize by stating the current challenges and future opportunities in the development of 2D light-emitting materials. [ABSTRACT FROM AUTHOR]
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- 2018
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7. Two-dimensional transistors beyond graphene and TMDCs.
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Duan, Xidong, Liu, Yuan, Duan, Xiangfeng, and Huang, Yu
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ELECTRIC properties of graphene , *GRAPHENE synthesis , *ELECTRIC properties of nanostructured materials , *OPTICAL properties of nanostructured materials , *NANOSTRUCTURED materials analysis - Abstract
Two-dimensional semiconductors (2DSCs) have attracted considerable attention as atomically thin channel materials for field-effect transistors. Each layer in 2DSCs consists of a single- or few-atom-thick, covalently bonded lattice, in which all carriers are confined in their atomically thin channel with superior gate controllability and greatly suppressed OFF-state current, in contrast to typical bulk semiconductors plagued by short channel effects and heat generation from static power. Additionally, 2DSCs are free of surface dangling bonds that plague traditional semiconductors, and hence exhibit excellent electronic properties at the limit of single atom thickness. Therefore, 2DSCs can offer significant potential for the ultimate transistor scaling to single atomic body thickness. Earlier studies of graphene transistors have been limited by the zero bandgap and low ON–OFF ratio of graphene, and transition metal dichalcogenide (TMDC) devices are typically plagued by insufficient carrier mobility. To this end, considerable efforts have been devoted towards searching for new 2DSCs with optimum electronic properties. Within a relatively short period of time, a large number of 2DSCs have been demonstrated to exhibit unprecedented characteristics or unique functionalities. Here we review the recent efforts and progress in exploring novel 2DSCs beyond graphene and TMDCs for ultra-thin body transistors, discussing the merits, limits and prospects of each material. [ABSTRACT FROM AUTHOR]
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- 2018
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8. Synthesis, properties, and optoelectronic applications of two-dimensional MoS2 and MoS2-based heterostructures.
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Wang, Hongmei, Zhang, Zulei, Li, Chunhe, Fang, Pengfei, and Zhang, Jin Zhong
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NANOSTRUCTURED materials analysis , *ELECTRIC properties of nanostructured materials , *OPTICAL properties of nanostructured materials , *NANOSTRUCTURED materials synthesis , *NANOSTRUCTURED materials testing - Abstract
As a two-dimensional (2D) material, molybdenum disulfide (MoS2) exhibits unique electronic and optical properties useful for a variety of optoelectronic applications including light harvesting. In this article, we review recent progress in the synthesis, properties and applications of MoS2 and related heterostructures. Heterostructured materials are developed to add more functionality or flexibility compared to single component materials. Our focus is on their novel properties and functionalities as well as emerging applications, especially in the areas of light energy harvesting or conversion. We highlight the correlation between structural properties and other properties including electronic, optical, and dynamic. Whenever appropriate, we also try to provide fundamental insight gained from experimental as well as theoretical studies. Finally, we discuss some current challenges and opportunities in technological applications of MoS2. [ABSTRACT FROM AUTHOR]
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- 2018
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9. Graphene oxide liquid crystals: a frontier 2D soft material for graphene-based functional materials.
- Author
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Padmajan Sasikala, Suchithra, Lim, Joonwon, Kim, In Ho, Jung, Hong Ju, Yun, Taeyeong, Kim, Sang Ouk, and Han, Tae Hee
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GRAPHENE oxide , *ELECTRIC properties of graphene , *NANOSTRUCTURED materials analysis , *ELECTRIC properties of nanostructured materials , *OPTICAL properties of nanostructured materials - Abstract
Graphene, despite being the best known strong and electrical/thermal conductive material, has found limited success in practical applications, mostly due to difficulties in the formation of desired large-scale highly organized structures. Our discovery of a liquid crystalline phase formation in graphene oxide dispersion has enabled a broad spectrum of highly aligned graphene-based structures, including films, fibers, membranes, and mesoscale structures. In this review, the current understanding of the structure–property relationship of graphene oxide liquid crystals (GOLCs) is overviewed. Various synthetic methods and parameters that can be optimized for GOLC phase formation are highlighted. Along with the results from different characterization methods for the identification of the GOLC phases, the typical characteristics of different types of GOLC phases introduced so far, including nematic, lamellar and chiral phases, are carefully discussed. Finally, various interesting applications of GOLCs are outlined together with the future prospects for their further developments. [ABSTRACT FROM AUTHOR]
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- 2018
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10. Epitaxial growth and physical properties of 2D materials beyond graphene: from monatomic materials to binary compounds.
- Author
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Li, Geng, Guo, Hui, Huang, Li, Lu, Hongliang, Zhang, Yu-Yang, Lin, Xiao, Wang, Ye-Liang, Du, Shixuan, and Gao, Hong-Jun
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ELECTRIC properties of graphene , *GRAPHENE synthesis , *ELECTRIC properties of nanostructured materials , *NANOSTRUCTURED materials analysis , *NANOSTRUCTURED materials synthesis - Abstract
The discovery of graphene opened a door for manufacturing and investigating two-dimensional (2D) materials. After more than ten years of development, 2D materials have become one of the most important topics in materials research, with dozens of new materials having been synthesized experimentally and even more predicted theoretically. In this review, we provide a comprehensive overview of the fabrication of 2D materials based on epitaxial growth in an ultra-high vacuum (UHV) experimental environment and the investigation of their physical and chemical properties. In particular, we focus on techniques like intercalation, templated molecular adsorption, and direct selenization and tellurization of metal substrates. We discuss progress in fabrication methods of monatomic and binary 2D materials and highlight their interesting and quite unusual physical properties. Finally, we assess future directions of research in this field, where breakthroughs can be expected, and indicate where investments in additional research might be most rewarding scientifically. [ABSTRACT FROM AUTHOR]
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- 2018
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11. Covalent functionalization of two-dimensional group 14 graphane analogues.
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Huey, Warren L. B. and Goldberger, Joshua E.
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ELECTRIC properties of graphene , *GRAPHENE synthesis , *NANOSTRUCTURED materials analysis , *ELECTRIC properties of nanostructured materials , *OPTICAL properties of nanostructured materials - Abstract
The sp3-hybridized group 14 graphane analogues are a unique family of 2D materials in which every atom requires a terminal ligand for stability. Consequently, the optical, electronic, and thermal properties of these materials can be manipulated via covalent chemistry. Herein, we review the methodologies for preparing these materials, and compare their functionalization densities to Si/Ge(111) surfaces and other covalently terminated 2D materials. We discuss how the electronic structure, optical properties, and thermal stability of the 2D framework can be broadly tuned with the ligand identity and framework element. We highlight their recent application in electronics, optoelectronics, photocatalysis, and batteries. Overall, these materials are an intriguing regime in materials design in which both surface functionalization and solid-state chemistry can be uniquely exploited to systematically design properties and phenomena. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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12. Two-dimensional metal–organic framework nanosheets: synthesis and applications.
- Author
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Zhao, Meiting, Huang, Ying, Peng, Yongwu, Huang, Zhiqi, Ma, Qinglang, and Zhang, Hua
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NANOSTRUCTURED materials analysis , *ELECTRIC properties of nanostructured materials , *NANOSTRUCTURED materials synthesis , *NANOSTRUCTURED materials testing , *OPTICAL properties of nanostructured materials - Abstract
Two-dimensional (2D) metal–organic framework (MOF) nanosheets are attracting increasing research attention due to their unique properties originating from their ultrathin thickness, large surface area and high surface-to-volume atom ratios. Many great advances have been made in the synthesis and application of 2D MOF nanosheets over the past few years. In this review, we summarize the recent advances in the synthesis of 2D MOF nanosheets by using top-down methods, e.g. sonication exfoliation, mechanical exfoliation, Li-intercalation exfoliation and chemical exfoliation, and bottom-up methods, i.e. interfacial synthesis, three-layer synthesis, surfactant-assisted synthesis, modulated synthesis, and sonication synthesis. In addition, the recent progress in 2D MOF nanosheet-based nanocomposites is also briefly introduced. The potential applications of 2D MOF nanosheets in gas separation, energy conversion and storage, catalysis, sensors and biomedicine are discussed. Finally, we give our personal insights into the challenges and opportunities for the future research of 2D MOF nanosheets and their composites. [ABSTRACT FROM AUTHOR]
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- 2018
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13. 2D library beyond graphene and transition metal dichalcogenides: a focus on photodetection.
- Author
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Wang, Feng, Wang, Zhenxing, Wang, Fengmei, Zhang, Yu, Zhan, Xueying, Yin, Lei, Cheng, Ruiqing, Wang, Junjun, Wen, Yao, Shifa, Tofik Ahmed, and He, Jun
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ELECTRIC properties of graphene , *GRAPHENE synthesis , *CHALCOGENIDES , *ELECTRIC properties of nanostructured materials , *NANOSTRUCTURED materials analysis - Abstract
Two-dimensional layered materials (2DLMs) have attracted a tremendous amount of attention as photodetectors due to their fascinating features, including high potentials in new-generation electronic devices, wide coverage of bandgaps, ability to construct van der Waals heterostructures, extraordinary light–mass interaction, strong mechanical flexibility, and the capability of enabling synthesis of 2D nonlayered materials. Until now, most attention has been focused on the well-known graphene and transition metal dichalcogenides (TMDs). However, a growing number of functional materials (more than 5619) with novel optoelectronic and electronic properties are being re-discovered, thereby widening the horizon of 2D libraries. In addition to showing common features of 2DLMs, these new 2D members may bring new opportunities to their well-known analogues, like wider bandgap coverage, direct bandgaps independence with thickness, higher mechanical flexibility, and new photoresponse phenomena. The impressive results communicated so far testify that they have shown high potentials with photodetections covering THz, IR, visible, and UV ranges with comparable or even higher performances than well-known TMDs. Here, we give a comprehensive review on the state-of-the-art photodetections of two-dimensional materials beyond graphene and TMDs. The review is organized as follows: fundamentals of photoresponse first are discussed, followed by detailed photodetections of new 2D members including both layered and non-layered ones. After that, photodiodes and hybrid structures based on these new 2D materials are summarized. Then, the integration of these 2D materials with flexible substrates is reviewed. Finally, we conclude with the current research status of this area and offer our perspectives on future developments. We hope that, through reading this manuscript, readers will quickly have a comprehensive view on this research area. [ABSTRACT FROM AUTHOR]
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- 2018
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14. Understanding and exploiting nanoparticles' intimacy with the blood vessel and blood.
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Setyawati, Magdiel Inggrid, Tay, Chor Yong, Docter, Dominic, Stauber, Roland H., and Leong, David Tai
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NANOPARTICLES , *NANOMEDICINE , *ENDOTHELIAL cells , *NANOBIOTECHNOLOGY , *NANOSTRUCTURED materials analysis ,TREATMENT of vascular diseases - Abstract
While the blood vessel is seldom the target tissue, almost all nanomedicine will interact with blood vessels and blood at some point of time along its life cycle in the human body regardless of their intended destination. Despite its importance, many bionanotechnologists do not feature endothelial cells (ECs), the blood vessel cells, or consider blood effects in their studies. Including blood vessel cells in the study can greatly increase our understanding of the behavior of any given nanomedicine at the tissue of interest or to understand side effects that may occur in vivo. In this review, we will first describe the diversity of EC types found in the human body and their unique behaviors and possibly how these important differences can implicate nanomedicine behavior. Subsequently, we will discuss about the protein corona derived from blood with foci on the physiochemical aspects of nanoparticles (NPs) that dictate the protein corona characteristics. We would also discuss about how NPs characteristics can affect uptake by the endothelium. Subsequently, mechanisms of how NPs could cross the endothelium to access the tissue of interest. Throughout the paper, we will share some novel nanomedicine related ideas and insights that were derived from the understanding of the NPs' interaction with the ECs. This review will inspire more exciting nanotechnologies that had accounted for the complexities of the real human body. [ABSTRACT FROM AUTHOR]
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- 2015
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15. Anisotropically branched metal nanostructures.
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Ye, Enyi, Regulacio, Michelle D., Zhang, Shuang-Yuan, Loh, Xian Jun, and Han, Ming-Yong
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ANISOTROPY , *NANOSTRUCTURED materials analysis , *METAL analysis , *PLASMONICS , *MEDICAL research - Abstract
Metal nanostructures display a multitude of technologically useful properties that can be tailored through fine-tuning of certain parameters, such as size, shape and composition. In many cases, the shape or morphology of metal nanostructures plays the most crucial role in the determination of their properties and their suitability in specific applications. In this tutorial review, we provide a summary of recent research that centers on metal nanostructures having anisotropically branched morphologies. The branched structural features that are exhibited by these materials endow them with unique properties that can be utilized in many important applications. The formation of branched architectures can be achieved in solution through a variety of synthetic strategies, four of which are highlighted in this review and these are: (1) seedless growth, (2) seeded growth, (3) templated growth, and (4) chemical etching. The usefulness of these anisotropically branched metal nanostructures in the areas of plasmonics, catalysis and biomedicine is also presented. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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16. Back cover.
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NANOSTRUCTURED materials analysis , *GRAPHENE synthesis , *NANOSTRUCTURED materials synthesis , *NANOSTRUCTURED materials testing , *EPITAXY - Published
- 2018
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17. Front cover.
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OPTICAL properties of graphene , *NANOSTRUCTURED materials analysis , *CHEMISTRY periodicals - Published
- 2018
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