Controllable-density nanojunctions as SERS substrates for highly sensitive detection
Controllable-density nanojunctions as SERS substrates for highly sensitive detection
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可控密度纳米结作为 SERS 基底,用于高灵敏度检测
DOI:
10.1016/j.apsusc.2015.02.023
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发表时间:
2015-04
影响因子:
6.7
通讯作者:
Weiyue Zhu
中科院分区:
文献类型:
--
作者:
Zhiliang Zhang;Weiyue Zhu
A facile and efficient approach was designed to fabricate highly sensitive and reproducible SERS-active substrates based on the controllable-density nanojunctions with ink-jet printing technique. In this system, polyvinylpyrrolidone-capped silver nanoparticles (AgNPs) were ink-jet printed on substrates and subsequently dipped into sodium chloride solution. The capped molecules on the AgNPs surfaces were detached with the competitive absorption of chloride, and spontaneously triggered to form the controllable-density nanojunctions among the AgNPs aggregates. These formed AgNPs nanojunctions demonstrated excellent controllability, reproducibility, and a detection limit of 1 × 10−11M level for Rhodamine 6G probe molecules. This strategy could be expected to construct multifarious SERS sensors for highly sensitive detection in chemical and biological fields.
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影响因子:
19
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通讯作者:
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影响因子:
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