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Your search keyword '"Futao He"' showing total 5 results
Start Over Author "Futao He" Topic physical and theoretical chemistry
5 results on '"Futao He"'

1. Insights into Fluorophores of Dual-Emissive Carbon Dots Derived by Naphthalenediol Solvothermal Synthesis

Author

Tao Ding, Futao He, Hai-Bei Li, Xianrui Meng, Jing Bai, Yanyan Cheng, Xiaomin Fang, Kaushalya Weerasinghe, Wenkai Zhang, and Hao Xu

Subjects
Materials science, Solvothermal synthesis, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Fluorescence, Combinatorial chemistry, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Dual (category theory), General Energy, chemistry, Physical and Theoretical Chemistry, 0210 nano-technology, Carbon
Abstract

Versatile species have been increasingly recognized as important components and possible fluorescence origins in carbon dots synthesized via a bottom-up route. Herein, we use 2,7-naphthalenediol an...

Published
2021

2. Purcell-Enhanced Spontaneous Emission from Perovskite Quantum Dots Coupled to Plasmonic Crystal

Author

Yuanqing Xu, Hanmei Li, Xiaomin Fang, Tao Ding, Xianrui Meng, Chuankun Ji, Futao He, Weiwei Zhu, and Weiya Zhang

Subjects
Materials science, business.industry, Halide, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Crystal, Condensed Matter::Materials Science, General Energy, Quantum dot, Optoelectronics, Spontaneous emission, Physical and Theoretical Chemistry, 0210 nano-technology, business, Plasmon, Perovskite (structure)
Abstract

Lead halide perovskite quantum dots (PQDs) have recently been proposed as scalable and color-tunable single emitters, but their slow spontaneous emission (1–10 ns) creates a mismatch with high-spee...

Published
2019

3. Ethanothermal synthesis of phenol-derived carbon dots with multiple color emission via a versatile oxidation strategy

Author

Hao Xu, Lu Wang, Xiaomin Fang, Hanmei Li, Tao Ding, Xianrui Meng, Weiya Zhang, Futao He, Weiwei Zhu, and Yongwei Huang

Subjects
Materials science, Photoluminescence, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, Photochemistry, 01 natural sciences, Inorganic Chemistry, chemistry.chemical_compound, Phenol, Reactivity (chemistry), Electrical and Electronic Engineering, Physical and Theoretical Chemistry, Spectroscopy, Organic Chemistry, Epoxy, 021001 nanoscience & nanotechnology, Fluorescence, Atomic and Molecular Physics, and Optics, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, Amorphous solid, chemistry, visual_art, visual_art.visual_art_medium, Nanodot, 0210 nano-technology, Carbon
Abstract

Herein, we report an ethanothermal synthesis of multicolor fluorescent carbon dots (CDs) by using a series of phenols and oxidants as the precursors. The emission colors of CDs are well-controlled at blue, green, yellow or red wavelengths by adjusting the combination of a phenol and an oxidant. And the naphthalenediol with highly reactivity and the oxidant with heavy halogen atom result in CDs exhibiting long wavelength emission. The resulting nanodots are characterized as amorphous aggregates with abundant oxygen species. The phenol-derived CDs can be used as highly processible fillers to fabricate epoxy composites, and a white light-emitting diode (LED) employing the multicolor CDs/epoxy composite as the light converter is also demonstrated.

Published
2019

4. Excited-state intramolecular proton-transfer-induced dual fluorescence emission in 2,3-dichloro-5,6-dicyano-1,4-benzoquinone and resorcinol-based carbon dots

Author

Jing Bai, Weiwei Zhu, Futao He, Yanyan Cheng, Xianrui Meng, Hao Xu, Yuanqing Xu, Wenkai Zhang, Xiaomin Fang, and Hai-Bei Li

Subjects
Inorganic Chemistry, Organic Chemistry, Electrical and Electronic Engineering, Physical and Theoretical Chemistry, Atomic and Molecular Physics, and Optics, Spectroscopy, Electronic, Optical and Magnetic Materials
Published
2022

5. Polymer spacer tunable Purcell-enhanced spontaneous emission in perovskite quantum dots coupled to plasmonic nanowire networks

Author

Xiaomin Fang, Weiya Zhang, Tao Ding, Futao He, Xianrui Meng, Yuanqing Xu, Weiwei Zhu, Hanmei Li, and Chuankun Ji

Subjects
Materials science, business.industry, Exciton, Nanowire, General Physics and Astronomy, Quantum yield, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Emission intensity, 0104 chemical sciences, Quantum dot, Optoelectronics, Spontaneous emission, Physical and Theoretical Chemistry, 0210 nano-technology, business, Plasmon, Perovskite (structure)
Abstract

Lead halide perovskite quantum dots (PQDs) have recently been proposed as a scalable and color-tunable quantum source, but their slow spontaneous emission creates a mismatch with high-speed nanophotonic devices. Here, we demonstrate fast and bright emission in PQD films coupled to silver nanowire networks (NWKs), in which polyvinyl alcohol (PVA) is used as a spacer to regulate the lossy characteristics of the plasmonic cavity. Compared with bare quartz, the PVA substrate shows a considerable enhancement effect on the apparent emission intensity, but a reduction in the emission rate of PQD excitons. The efficient NWK-PQD coupling generates an increase in the emission intensity of a factor of 6.0 (average 3.4) and simultaneously a 2.4-fold (average 1.9) enhancement in the emission rate. However, an opposite PVA spacer thickness dependence for Purcell factor and quantum yield is observed, indicating that the fast and bright emission would be a trade-off between the Purcell-enhanced radiative rate and large metal loss. These results are believed to provide fundamental guidance on plasmonic cavity design for perovskite-based nanophotonic devices.

Published
2019

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