TY - JOUR
T1 - Au/AgI Dimeric Nanoparticles for Highly Selective and Sensitive Colorimetric Detection of Hydrogen Sulfide
AU - Zeng, Jingbin
AU - Li, Min
AU - Liu, Ao
AU - Feng, Fan
AU - Zeng, Teng
AU - Duan, Wei
AU - Li, Mengmeng
AU - Gong, Mingfu
AU - Wen, Cong Ying
AU - Yin, Yadong
N1 - Funding Information:
This work was supported by the Natural Scientific Foundation of Shandong (ZR2016BQ23), the Fundamental Research Funds for the Central Universities (17CX02055 and 18CX02037A), and the National Natural Science Foundation of China (81501521). Y.Y. acknowledges the support from the U.S. National Science Foundation(CHE-1308587).
Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/6/27
Y1 - 2018/6/27
N2 - The development of Au/AgI dimeric nanoparticles (NPs) is reported for highly selective colorimetric detection of hydrogen sulfide (H2S). The detection mechanism is designed by taking advantage of the chemical transformation of AgI to Ag2S upon reacting with sulfide, which leads to a shift in the plasmonic band of the attached Au NPs. The plasmonic shift is accompanied by a color change of the solution from purplish red to blue and finally to light green depending on the concentration of sulfide, thus enables a naked-eye readout and UV–vis quantitation of the sulfide exposure. The Au/AgI dimeric NPs are further immobilized in agarose gels to produce test strips, which can be used for both naked-eye readout and quantitative detection of sulfide using UV–vis spectroscopy thanks to its transparency in the visible region. Compared to commercial Pb(Ac)2 test papers, the agarose gel strip has superior performance for detecting sulfide in terms of sensitivity, selectivity, stability, and fidelity. The agarose gel is also capable of detecting gaseous H2S at important concentration thresholds, suggesting its practicability in real life applications. The potential of agarose gels is further highlighted by its ability in the enrichment and colorimetric detection of gaseous H2S released during cell cultivation.
AB - The development of Au/AgI dimeric nanoparticles (NPs) is reported for highly selective colorimetric detection of hydrogen sulfide (H2S). The detection mechanism is designed by taking advantage of the chemical transformation of AgI to Ag2S upon reacting with sulfide, which leads to a shift in the plasmonic band of the attached Au NPs. The plasmonic shift is accompanied by a color change of the solution from purplish red to blue and finally to light green depending on the concentration of sulfide, thus enables a naked-eye readout and UV–vis quantitation of the sulfide exposure. The Au/AgI dimeric NPs are further immobilized in agarose gels to produce test strips, which can be used for both naked-eye readout and quantitative detection of sulfide using UV–vis spectroscopy thanks to its transparency in the visible region. Compared to commercial Pb(Ac)2 test papers, the agarose gel strip has superior performance for detecting sulfide in terms of sensitivity, selectivity, stability, and fidelity. The agarose gel is also capable of detecting gaseous H2S at important concentration thresholds, suggesting its practicability in real life applications. The potential of agarose gels is further highlighted by its ability in the enrichment and colorimetric detection of gaseous H2S released during cell cultivation.
KW - agarose gel strips
KW - colorimetric detection
KW - dimeric nanoparticles
KW - hydrogen sulfide
KW - surface plasmon resonance
UR - http://www.scopus.com/inward/record.url?scp=85045377607&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85045377607&partnerID=8YFLogxK
U2 - 10.1002/adfm.201800515
DO - 10.1002/adfm.201800515
M3 - Article
AN - SCOPUS:85045377607
SN - 1057-9257
VL - 28
JO - Advanced Materials for Optics and Electronics
JF - Advanced Materials for Optics and Electronics
IS - 26
M1 - 1800515
ER -