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de Souza Carvalho TA, Magalhaes LF, do Livramento Santos CI, de Freitas TAZ, Carvalho Vale BR, Vale da Fonseca AF, Schiavon MA. Lead-Free Metal Halide Perovskite Nanocrystals: From Fundamentals to Applications. Chemistry 2023; 29:e202202518. [PMID: 36206198 DOI: 10.1002/chem.202202518] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Indexed: 11/22/2022]
Abstract
Lead (Pb) halide perovskite nanocrystals, with the general formula APbX3 , where A=CH3 NH3+ , CH(NH2 )2+ , or Cs+ and X=Cl- , Br- , or I- , have emerged as a class of materials with promising properties due to their remarkable optical properties and solar cell performance. However, important issues still need to be addressed to enable practical applications of these materials, such as instability, mass production, and Pb toxicity. Recent studies have carried out the replacement of Pb by various less-toxic cations as Sn, Ge, Sb, and Bi. This variety of chemical compositions provide Pb-free perovskite and metal halide nanostructures with a wide spectral range, in addition to being considered less toxic, therefore having greater practical applicability. Highlighting the necessity to address and solve the toxicity problems related to Pb-containing perovskite, this review considers the prospects of the Pb-free perovskite, involving synthesis methods, and properties of them, including advantages, disadvantages, and applications.
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Affiliation(s)
- Thaís Adriany de Souza Carvalho
- Departamento de Ciências Naturais (DCNat), Universidade Federal de São João del-Rei (UFSJ), São João del-Rei, MG, 36301-160, Brasil
| | - Leticia Ferreira Magalhaes
- Departamento de Ciências Naturais (DCNat), Universidade Federal de São João del-Rei (UFSJ), São João del-Rei, MG, 36301-160, Brasil
| | | | - Thiago Alvares Zamaro de Freitas
- Departamento de Ciências Naturais (DCNat), Universidade Federal de São João del-Rei (UFSJ), São João del-Rei, MG, 36301-160, Brasil
| | - Brener Rodrigo Carvalho Vale
- Departamento de Ciências Naturais (DCNat), Universidade Federal de São João del-Rei (UFSJ), São João del-Rei, MG, 36301-160, Brasil.,Instituto de Física "Gleb Wataghin", Universidade Estadual de Campinas, Unicamp, Campinas, São Paulo, 13083-859, Brasil
| | - André Felipe Vale da Fonseca
- Departamento de Ciências Naturais (DCNat), Universidade Federal de São João del-Rei (UFSJ), São João del-Rei, MG, 36301-160, Brasil
| | - Marco Antônio Schiavon
- Departamento de Ciências Naturais (DCNat), Universidade Federal de São João del-Rei (UFSJ), São João del-Rei, MG, 36301-160, Brasil
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Zhang D, Tang L, Chen J, Tang Z, Liang P, Huang Y, Cao M, Zou M, Ni D, Chen J, Yu Z, Jin S. Controllable Self-Assembly of SERS Hotspots in Liquid Environment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:939-948. [PMID: 33397111 DOI: 10.1021/acs.langmuir.0c03323] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Controllable synthesis of novel metal nanoparticles and effective capture of hotspots are of great significance for SERS (surface-enhanced Raman spectroscopy) detection. Therefore, in this paper, a green controllable synthesis method of gold nanoparticle was achieved via epigallocatechin gallate reduction. Different morphologies of gold nanoparticles were synthesized just by changing the solution pH values, and the growth kinetics of AuNPs (gold nanoparticles) were systematically studied. The synthetic AuNPs were put in a droplet to study dynamic variations of self-assembly SERS hotspots from the liquid sol state to the solid dry state. The addition of halogen ions in the droplet can controllably regulate the self-assembly three-dimensional hotspot model of gold nanoparticles in the evaporation process of a droplet, during which the most enhancement effect can be easily captured. The dynamically changing images of nanoparticles in the process were graphically described based on the internal interaction forces of a droplet. Two stronger areas in the changes of SERS intensity were achieved with a high concentration of halogen ions, while only one maximum intensity area was obtained with a low concentration of halogen ions added. This method can effectively avoid complex and unpredictable microenvironments of SERS substrates in the liquid drop, further improving the reproducibility of SERS detection as well as broadening it to biological applications.
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Affiliation(s)
- De Zhang
- College of Optical and Electronic Technology, China Jiliang University, 310018 Hangzhou, China
| | - Lisha Tang
- College of Optical and Electronic Technology, China Jiliang University, 310018 Hangzhou, China
| | | | - Zhexiang Tang
- College of Optical and Electronic Technology, China Jiliang University, 310018 Hangzhou, China
| | - Pei Liang
- College of Optical and Electronic Technology, China Jiliang University, 310018 Hangzhou, China
| | | | | | - Mingqiang Zou
- Chinese Academy of Inspection and Quarantine (CAIQ), No. A 3, Gaobeidian Road, Chaoyang District, Beijing 100123, China
- China Inspection Laboratory Technologies Co. Ltd. (CILT), No. A 3, Gaobeidian Road, Chaoyang District, Beijing 100123, China
| | | | | | | | - Shangzhong Jin
- College of Optical and Electronic Technology, China Jiliang University, 310018 Hangzhou, China
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