TY - JOUR
T1 - Fast microwave-assisted synthesis of AuAg bimetallic nanoclusters with strong yellow emission and their response to mercury(II) ions
AU - Zheng, Baozhan
AU - Zheng, Jingying
AU - Yu, Tingting
AU - Sang, Aohua
AU - Du, Juan
AU - Guo, Yong
AU - Xiao, Dan
AU - Choi, Martin M.F.
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China ( 21377089 and 21407109 ), the Doctoral Program Foundation of Institutions of Higher Education of China ( 20120181120075 ) and the China Postdoctoral Science Foundation ( 2013M531962 ). We express our thanks to Ms Shanling Wang of the Analytical & Testing Center of Sichuan University for taking the HRTEM images.
PY - 2015/7/13
Y1 - 2015/7/13
N2 - A rapid, effective and environmental friendly method was developed for preparing strong yellow fluorescent AuAg bimetallic nanoclusters (BNCs). With microwave irradiation, bovine serum albumin (BSA)-stabilized AuAg BNCs could be synthesized in a one-pot procedure within several minutes. The synthesized BSA-AuAg BNCs were fully characterized by high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, infrared spectroscopy, and photoluminescence spectroscopy. The mechanism of the formation of BSA-AuAg BNCs was also discussed in detail. Because the as-prepared BSA-AuAg BNCs display a good response to Hg2+, they have been potentially developed for the fabrication of fluorescent Hg2+ sensor. More importantly, due to the silver effect of Ag in the AuAg BNCs, the sensitivity of sensor prepared with BSA-AuAg BNCs is 6.3-fold higher than that prepared with BSA-Au NCs. Thus, this work highlights a new approach for the preparation of strongly fluorescent BNCs for the fabrication of highly sensitive fluorescence sensors.
AB - A rapid, effective and environmental friendly method was developed for preparing strong yellow fluorescent AuAg bimetallic nanoclusters (BNCs). With microwave irradiation, bovine serum albumin (BSA)-stabilized AuAg BNCs could be synthesized in a one-pot procedure within several minutes. The synthesized BSA-AuAg BNCs were fully characterized by high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, infrared spectroscopy, and photoluminescence spectroscopy. The mechanism of the formation of BSA-AuAg BNCs was also discussed in detail. Because the as-prepared BSA-AuAg BNCs display a good response to Hg2+, they have been potentially developed for the fabrication of fluorescent Hg2+ sensor. More importantly, due to the silver effect of Ag in the AuAg BNCs, the sensitivity of sensor prepared with BSA-AuAg BNCs is 6.3-fold higher than that prepared with BSA-Au NCs. Thus, this work highlights a new approach for the preparation of strongly fluorescent BNCs for the fabrication of highly sensitive fluorescence sensors.
KW - AuAg bimetallic nanoclusters
KW - Hg<sup>2+</sup> sensor
KW - Microwave synthesis
KW - Silver effect
UR - http://www.scopus.com/inward/record.url?scp=84936937415&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2015.06.089
DO - 10.1016/j.snb.2015.06.089
M3 - Journal article
AN - SCOPUS:84936937415
SN - 0925-4005
VL - 221
SP - 386
EP - 392
JO - Sensors and Actuators B: Chemical
JF - Sensors and Actuators B: Chemical
ER -