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Fluoropolymer: A Review on Its Emulsion Preparation and Wettability to Solid-Liquid Interface. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020905. [PMID: 36677962 PMCID: PMC9866989 DOI: 10.3390/molecules28020905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 12/13/2022] [Accepted: 12/14/2022] [Indexed: 01/18/2023]
Abstract
In the preparation of a superamphiphobic surface, the most basic method is to reduce the surface free energy of the interface. The C-F bond has a very low surface free energy, which can significantly change the wettability of the solid-liquid interface and make it a hydrophobic or oleophobic, or even superamphiphobic surface. Based on the analysis of a large number of research articles, the preparation and application progress in fluoropolymer emulsion were summarized. After that, some corresponding thoughts were put forward combined with our professional characteristics. According to recent research, the status of the fluoropolymer emulsion preparation system was analyzed. In addition, all related aspects of fluoropolymer emulsion were systematically classified in varying degrees. Furthermore, the interaction between fluoropolymer structure and properties, especially the interaction with nanomaterials, was also explored. The aim of this review is to try to attract more scholars' attention to fluorocarbon interfacial materials. It is expected that it will make a certain theoretical and practical significance in the preparation and application of fluoropolymer.
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Chen T, Wang C, Xing X, Qin Z, Qin F, Wang Y, Alam MK, Hadjiev VG, Yang G, Ye S, Yang J, Wang R, Yue S, Zhang D, Shang Z, Robles-Hernandez FC, Calderon HA, Wang H, Wang Z, Bao J. Integration of Highly Luminescent Lead Halide Perovskite Nanocrystals on Transparent Lead Halide Nanowire Waveguides through Morphological Transformation and Spontaneous Growth in Water. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2105009. [PMID: 35060296 DOI: 10.1002/smll.202105009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 12/08/2021] [Indexed: 06/14/2023]
Abstract
The integration of highly luminescent CsPbBr3 quantum dots on nanowire waveguides has enormous potential applications in nanophotonics, optical sensing, and quantum communications. On the other hand, CsPb2 Br5 nanowires have also attracted a lot of attention due to their unique water stability and controversial luminescent property. Here, the growth of CsPbBr3 nanocrystals on CsPb2 Br5 nanowires is reported first by simply immersing CsPbBr3 powder into pure water, CsPbBr3- γ Xγ (X = Cl, I) nanocrystals on CsPb2 Br5 -γ Xγ nanowires are then synthesized for tunable light sources. Systematic structure and morphology studies, including in situ monitoring, reveal that CsPbBr3 powder is first converted to CsPb2 Br5 microplatelets in water, followed by morphological transformation from CsPb2 Br5 microplatelets to nanowires, which is a kinetic dissolution-recrystallization process controlled by electrolytic dissociation and supersaturation of CsPb2 Br5 . CsPbBr3 nanocrystals are spontaneously formed on CsPb2 Br5 nanowires when nanowires are collected from the aqueous solution. Raman spectroscopy, combined photoluminescence, and SEM imaging confirm that the bright emission originates from CsPbBr3 -γ Xγ nanocrystals while CsPb2 Br5 -γ Xγ nanowires are transparent waveguides. The intimate integration of nanoscale light sources with a nanowire waveguide is demonstrated through the observation of the wave guiding of light from nanocrystals and Fabry-Perot interference modes of the nanowire cavity.
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Affiliation(s)
- Tao Chen
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Chong Wang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Xinxin Xing
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Zhaojun Qin
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Fan Qin
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
| | - Yanan Wang
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
| | - Md Kamrul Alam
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
| | - Viktor G Hadjiev
- Department of Mechanical Engineering, University of Houston, Houston, TX, 77204, USA
- Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA
| | - Guang Yang
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
| | - Shuming Ye
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Jie Yang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Rongfei Wang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, 650091, P. R. China
| | - Shuai Yue
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Di Zhang
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Zhongxia Shang
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Francisco C Robles-Hernandez
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Mechanical Engineering Technology, University of Houston, Houston, TX, 77204, USA
| | - Hector A Calderon
- Instituto Politecnico Nacional, ESFM-IPN, UPALM, Departamento de Física, Mexico CDMX, 07338, Mexico
| | - Haiyan Wang
- School of Materials Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Zhiming Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
| | - Jiming Bao
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, 77204, USA
- Texas Center for Superconductivity, University of Houston, Houston, TX, 77204, USA
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Cheng L, Mao S, Li Z, Han Y, Fu HY. Grating Couplers on Silicon Photonics: Design Principles, Emerging Trends and Practical Issues. MICROMACHINES 2020; 11:E666. [PMID: 32650573 PMCID: PMC7407772 DOI: 10.3390/mi11070666] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 07/06/2020] [Accepted: 07/06/2020] [Indexed: 01/19/2023]
Abstract
Silicon photonics is an enabling technology that provides integrated photonic devices and systems with low-cost mass manufacturing capability. It has attracted increasing attention in both academia and industry in recent years, not only for its applications in communications, but also in sensing. One important issue of silicon photonics that comes with its high integration density is an interface between its high-performance integrated waveguide devices and optical fibers or free-space optics. Surface grating coupler is a preferred candidate that provides flexibility for circuit design and reduces effort for both fabrication and alignment. In the past decades, considerable research efforts have been made on in-plane grating couplers to address their insufficiency in coupling efficiency, wavelength sensitivity and polarization sensitivity compared with out-of-plane edge-coupling. Apart from improved performances, new functionalities are also on the horizon for grating couplers. In this paper, we review the current research progresses made on grating couplers, starting from their fundamental theories and concepts. Then, we conclude various methods to improve their performance, including coupling efficiency, polarization and wavelength sensitivity. Finally, we discuss some emerging research topics on grating couplers, as well as practical issues such as testing, packaging and promising applications.
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Affiliation(s)
| | | | | | | | - H. Y. Fu
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen 518000, China; (L.C.); (S.M.); (Z.L.); (Y.H.)
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