ACS applied materials & interfaces, volume 8, issue 37, pages 24826-24836

Bandgap and Structure Engineering via Cation Exchange: From Binary Ag2S to Ternary AgInS2, Quaternary AgZnInS alloy and AgZnInS/ZnS Core/Shell Fluorescent Nanocrystals for Bioimaging

Jiangluqi Song 1, 2
Chao Ma 1, 2
Wenzhe Zhang 1, 2
Xiaolin Li 1, 2
Wenting Zhang 1, 2
Rongbo Wu 1, 2
Xiangcan Cheng 1, 2
Asad Ali 1, 2
Mingya Yang
Lixin Zhu
Ruixiang Xia
Xiaoliang Xu 1, 2
2
 
Key Laboratory of Strongly-coupled Quantum Matter Physics, Chinese Academy of Sciences, Hefei, Anhui 230026, China
Publication typeJournal Article
Publication date2016-09-07
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor9.5
ISSN19448244, 19448252
General Materials Science
Abstract
Attention on semiconductor nanocrystals have been largely focused because of their unique optical and electrical properties, which can be applied as light absorber and luminophore. However, the band gap and structure engineering of nanomaterials is not so easy because of their finite size. Here we demonstrate an approach for preparing ternary AgInS2 (AIS), quaternary AgZnInS (AZIS), AgInS2/ZnS and AgZnInS/ZnS nanocompounds based on cation exchange. First, pristine Ag2S quantum dots (QDs) with different sizes were synthesized in one-pot, followed by the partial cation exchange between In(3+) and Ag(+). Changing the initial ratio of In(3+) to Ag(+), reaction time and temperature can control the components of the obtained AIS QDs. Under the optimized conditions, AIS QDs were obtained for the first time with a cation disordered cubic phase and high photoluminescence (PL) quantum yield (QY) up to 32% in aqueous solution, demonstrating the great potential of cation exchange in the synthesis for nanocrystals with excellent optical properties. Sequentially, Zn(2+) ions were incorporated in situ through a second exchange of Zn(2+) to Ag(+)/In(3+), leading to distinct results under different reaction temperature. Addition of Zn(2+) precursor at room temperature produced AIS/ZnS core/shell NCs with successively enhancement of QY, while subsequent heating could obtain AZIS homogeneous alloy QDs with a successively blue-shift of PL emission. This allow us to tune the PL emission of the products from 483 to 675 nm and fabricate the chemically stable QDs core/ZnS shell structure. Based on the above results, a mechanism about the cation exchange for the ternary nanocrystals of different structures was proposed that the balance between cation exchange and diffusion is the key factor of controlling the band gap and structure of the final products. Furthermore, photostability and in vitro experiment demonstrated quite low cytotoxicity and remarkably promising applications in the field of clinical diagnosis.

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Song J. et al. Bandgap and Structure Engineering via Cation Exchange: From Binary Ag2S to Ternary AgInS2, Quaternary AgZnInS alloy and AgZnInS/ZnS Core/Shell Fluorescent Nanocrystals for Bioimaging // ACS applied materials & interfaces. 2016. Vol. 8. No. 37. pp. 24826-24836.
GOST all authors (up to 50) Copy
Song J., Ma C., Zhang W., Li X., Zhang W., Wu R., Cheng X., Ali A., Yang M., Zhu L., Xia R., Xu X. Bandgap and Structure Engineering via Cation Exchange: From Binary Ag2S to Ternary AgInS2, Quaternary AgZnInS alloy and AgZnInS/ZnS Core/Shell Fluorescent Nanocrystals for Bioimaging // ACS applied materials & interfaces. 2016. Vol. 8. No. 37. pp. 24826-24836.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1021/acsami.6b07768
UR - https://doi.org/10.1021/acsami.6b07768
TI - Bandgap and Structure Engineering via Cation Exchange: From Binary Ag2S to Ternary AgInS2, Quaternary AgZnInS alloy and AgZnInS/ZnS Core/Shell Fluorescent Nanocrystals for Bioimaging
T2 - ACS applied materials & interfaces
AU - Song, Jiangluqi
AU - Zhang, Wenzhe
AU - Wu, Rongbo
AU - Cheng, Xiangcan
AU - Yang, Mingya
AU - Zhu, Lixin
AU - Xia, Ruixiang
AU - Xu, Xiaoliang
AU - Ma, Chao
AU - Li, Xiaolin
AU - Zhang, Wenting
AU - Ali, Asad
PY - 2016
DA - 2016/09/07 00:00:00
PB - American Chemical Society (ACS)
SP - 24826-24836
IS - 37
VL - 8
SN - 1944-8244
SN - 1944-8252
ER -
BibTex |
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BibTex Copy
@article{2016_Song,
author = {Jiangluqi Song and Wenzhe Zhang and Rongbo Wu and Xiangcan Cheng and Mingya Yang and Lixin Zhu and Ruixiang Xia and Xiaoliang Xu and Chao Ma and Xiaolin Li and Wenting Zhang and Asad Ali},
title = {Bandgap and Structure Engineering via Cation Exchange: From Binary Ag2S to Ternary AgInS2, Quaternary AgZnInS alloy and AgZnInS/ZnS Core/Shell Fluorescent Nanocrystals for Bioimaging},
journal = {ACS applied materials & interfaces},
year = {2016},
volume = {8},
publisher = {American Chemical Society (ACS)},
month = {sep},
url = {https://doi.org/10.1021/acsami.6b07768},
number = {37},
pages = {24826--24836},
doi = {10.1021/acsami.6b07768}
}
MLA
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MLA Copy
Song, Jiangluqi, et al. “Bandgap and Structure Engineering via Cation Exchange: From Binary Ag2S to Ternary AgInS2, Quaternary AgZnInS alloy and AgZnInS/ZnS Core/Shell Fluorescent Nanocrystals for Bioimaging.” ACS applied materials & interfaces, vol. 8, no. 37, Sep. 2016, pp. 24826-24836. https://doi.org/10.1021/acsami.6b07768.
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