Cation Crosslinking-Induced Stable Copper Nanoclusters Powder as Latent Fingerprints Marker

Yi Qiu; Zhuoqi Wen; Shiliang Mei; Jinxin Wei; Yuanyuan Chen; Zhe Hu; Zhongjie Cui; Wanlu Zhang; Fengxian Xie; Ruiqian Guo

doi:10.3390/nano11123371

Nanomaterials (Dec 2021)

Cation Crosslinking-Induced Stable Copper Nanoclusters Powder as Latent Fingerprints Marker

Yi Qiu,
Zhuoqi Wen,
Shiliang Mei,
Jinxin Wei,
Yuanyuan Chen,
Zhe Hu,
Zhongjie Cui,
Wanlu Zhang,
Fengxian Xie,
Ruiqian Guo

Affiliations

Yi Qiu: Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai 200433, China
Zhuoqi Wen: Institute of Future Lighting, Academy for Engineering and Technology, Fudan University, Shanghai 200433, China
Shiliang Mei: Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai 200433, China
Jinxin Wei: Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai 200433, China
Yuanyuan Chen: Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai 200433, China
Zhe Hu: Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai 200433, China
Zhongjie Cui: Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai 200433, China
Wanlu Zhang: Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai 200433, China
Fengxian Xie: Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai 200433, China
Ruiqian Guo: Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai 200433, China

DOI: https://doi.org/10.3390/nano11123371
Journal volume & issue: Vol. 11, no. 12
p. 3371

Abstract

Read online

Luminescent copper nanoclusters (Cu NCs) have shown great potential in light-emitting devices (LEDs), chemical sensing, catalysis and biological fields. However, their practical use has been restricted by poor stability, and study on the stability of Cu NCs solid powder along with the mechanism is absent. In this study, stablized Cu NCs powder was first obtained by cation crosslinking method. Compared with the powder synthesized by solvent precipitation method, the stability of Cu NCs powder crosslinked by ionic inducer Ce3+ was enhanced around 100-fold. The storage time when the fluorescence intensity decreased to 85% (T85) was improved from 2 h to 216 h, which is the longest so far. The results of characterizations indicated that the aggregation structure was formed by the binding of Ce3+ with the capping ligands of Cu NCs, which helped in obtaining Ce-Cu NCs powder from aggregate precipitation in solution. Furthermore, this compact structure could avoid the destruction of ambient moisture resulting in long-lasting fluorescence and almost unchanged physical form. This demonstrated that phosphor, with excellent characteristics of unsophisticated synthesis, easy preservation and stable fluorescence, showed great potential in light sources, display technology and especially in latent fingerprints visualization on different substrates for forensic science.

Published in Nanomaterials

ISSN: 2079-4991 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: https://www.mdpi.com/journal/nanomaterials

About the journal

Abstract

Keywords