- 周濤 教授
- 四川大學 高分子研究所 高分子材料工程國家重點實驗室
- 網址: zhoutaopoly.polymer.cn 訪問量:270931
- 2DCS簡明教程-User guide, 提取碼:2DCS
- 2DCS free download link, code:2DCS
- 專業版直接下載,提取碼:2DCS
- 中國聚合物網
- 中國流變網
- 中國化學儀器網
- 化學化工論壇
- 通信地址:四川省成都市武侯區四川大學高分子材料工程國家重點實驗室
- 郵編:610065
- 電話:0
- 傳真:
- Email:zhoutaopoly@scu.edu.cn
關鍵字:Laser-induced; selective metallization; polymer; SERS; ultra-high sensitivity; R6G
論文來源:期刊
具體來源:ACS Sustainable Chemistry & Engineering, 2021, 9, 5038?5049
發表時間:2021年
A simple, low-cost, and reliable strategy
was developed to prepare SERS substrates with ultra-high sensitivity using laser-induced selective metallization of polymers combined
with an improved galvanic replacement reaction. To verify the SERS activity,
organic analytes, such as Rhodamine 6G (R6G), crystal violet (CV), and methylene
blue (MB), were selected as the probe molecules. Surprisingly, the detection
limit of R6G reached as low as 1×10-17 M in SERS tests with the
excitation wavelength of 532 nm, which was superior to the data reported in
most literature, indicating an ultra-high SERS sensitivity. XPS, WAXD, SEM, and
EDS revealed that evenly distributed nanoparticles with 203 nm based on the
Cu-Ag alloy were successfully formed on the Cu layer of the polymer. Besides, the
RSD values of the main characteristic peaks of R6G were less than 0.20, showing
a good reproducibility of the prepared SERS substrate. This SERS substrate also
demonstrated good stability because it still kept a high SERS sensitivity after
35 days of air storage. Moreover, this new substrate showed the potential for
reuse and probably addressed the problem that the traditional SERS substrate
can only be used once. We believe this facile and reliable approach to preparing
new SERS substrate will have prospects for large-scale production and
applications in the field of analytics.