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Yang H, Jiang X, Zhang M, Li BQ, Wang J, Han Y. Silicon eccentric shell nanoparticles fabricated by template-assisted deposition for Mie magnetic resonances enhanced light confinement. NANOTECHNOLOGY 2024; 35:235301. [PMID: 38430566 DOI: 10.1088/1361-6528/ad2f76] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 02/28/2024] [Indexed: 03/04/2024]
Abstract
We report a structure of silicon eccentric shell particles array, fabricated by the SiO2particles monolayer array assisted deposition of amorphous Si, for high-efficiency light confinement. The SiO2particles monolayer array is tailored to regulate its interparticle distance, followed by silicon film deposition to obtain silicon eccentric shell arrays with positive and negative off-center distancee. We studied the Mie resonances of silicon solid sphere, concentric shell, eccentric shell and observed that the eccentric shell with positive off-centeresupports superior light confinement because of the enhanced Mie magnetic resonances. Spectroscopic measurements and finite difference time domain simulations were conducted to examine the optical performance of the eccentric shell particles array. Results show that the Mie magnetic resonance wavelength can be easily regulated by the size of the inner void of the silicon shell to realize tunable enhanced light confinement. It was found silicon shell withD= 460/520 nm offered high enhanced light absorption efficiency at wavelength ofλ= 830 nm, almost beyond the bandgap of the amorphous silicon.
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Affiliation(s)
- Huan Yang
- School of Physics, Xidian University, Xi'an, 710071, People's Republic of China
- Guangzhou Institute of Technology, Xidian University, Guangzhou, 510555, People's Republic of China
| | - Xinbing Jiang
- School of Chemistry, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of China
| | - Manman Zhang
- Department of Mechanical Engineering, University of Michigan, Dearborn, MI, 48128, United States of America
| | - Ben Q Li
- State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of China
| | - Jiajie Wang
- School of Physics, Xidian University, Xi'an, 710071, People's Republic of China
| | - Yiping Han
- School of Physics, Xidian University, Xi'an, 710071, People's Republic of China
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Cibaka-Ndaya C, O’Connor K, Idowu EO, Parker MA, Lebraud E, Lacomme S, Montero D, Camacho PS, Veinot JGC, Roiban IL, Drisko GL. Understanding the Formation Mechanisms of Silicon Particles from the Thermal Disproportionation of Hydrogen Silsesquioxane. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2023; 35:8551-8560. [PMID: 37901141 PMCID: PMC10601469 DOI: 10.1021/acs.chemmater.3c01448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 09/02/2023] [Indexed: 10/31/2023]
Abstract
Crystalline silicon particles sustaining Mie resonances are readily obtained from the thermal processing of hydrogen silsesquioxane (HSQ). Here, the mechanisms involved in silicon particle formation and growth from HSQ are investigated through real-time in situ analysis using an environmental transmission electron microscope and X-ray diffractometer. The nucleation of Si nanodomains is observed starting around 1000 °C. For the first time, a highly mobile intermediate phase is experimentally observed, thus demonstrating a previously unknown growth mechanism. At least two growth processes occur simultaneously: the coalescence of small particles into larger particles and growth mode by particle displacement through the matrix toward the HSQ grain surface. Postsynthetic characterization by scanning electron microscopy further supports the latter growth mechanism. The gaseous environment employed during synthesis impacts particle formation and growth under both in situ and ex situ conditions, impacting the particle yield and structural homogeneity. Understanding the formation mechanisms of particles provides promising pathways for reducing the energy cost of this synthetic route.
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Affiliation(s)
| | - Kevin O’Connor
- Department
of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | | | - Megan A. Parker
- Univ.
Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33600 Pessac, France
| | - Eric Lebraud
- Univ.
Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33600 Pessac, France
| | - Sabrina Lacomme
- Univ.
Bordeaux, CNRS, INSERM, Bordeaux Imaging Center, UAR 3420, F-33600 Pessac, France
| | - David Montero
- Sorbonne
Université, CNRS, Fédération de Chimie et Matériaux
de Paris-Centre, FR 2482, 75252 Paris, France
| | - Paula Sanz Camacho
- Univ.
Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33600 Pessac, France
| | | | - Ioan-Lucian Roiban
- Univ.
Lyon, INSA Lyon, Université Claude Bernard Lyon 1, CNRS, MATEIS,
UMR5510, 69621 Villeurbanne, France
| | - Glenna L. Drisko
- Univ.
Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33600 Pessac, France
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Chen RY, Lai CJ, Chen YJ, Wu MX, Yang H. Omnidirectional / Unidirectional Antireflection-Switchable Structures Inspired by Dragonfly Wings. J Colloid Interface Sci 2021; 610:246-257. [PMID: 34923266 DOI: 10.1016/j.jcis.2021.12.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 11/29/2021] [Accepted: 12/04/2021] [Indexed: 10/19/2022]
Abstract
Randomly arranged irregular inclined conical structure-covered dragonfly wings, distinguished from periodic conical structure-covered cicada wings, are with high optical transparency for wide viewing angles. Bioinspired by the antireflective structures, we develop a colloidal lithography approach for engineering randomly arranged irregular conical structures with shape memory polymer-based tips. The structures establish a gradual refractive index transition to suppresses optical reflection in the visible spectrum. By manipulating the configuration of structure tips through applying common solvent stimulations or contact pressures under ambient conditions, the resulting unidirectional antireflection and omnidirectional antireflection performances are able to be instantaneously and reversibly switched. The dependences of structure shape, structure inclination, structure arrangement, and structure composition on the switchable antireflection capability are also systematically investigated in this study.
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Affiliation(s)
- Ru-Yu Chen
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan
| | - Chung-Jui Lai
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan
| | - You-Jie Chen
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan
| | - Mei-Xuan Wu
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan
| | - Hongta Yang
- Department of Chemical Engineering, National Chung Hsing University, 145 Xingda Road, Taichung City 40227, Taiwan
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