Polydopamine/Silver Substrates Stemmed from Chiral Silica for SERS Differentiation of Amino Acid Enantiomers

被引：25
|
作者：
Kong, Huanjun [1 ]
Sun, Xueping [1 ]
Yang, Liu [1 ]
Liu, Xinling [1 ]
Yang, Haifeng [1 ]
Jin, Ren-Hua [2 ]
机构：
[1] Shanghai Normal Univ, Coll Chem & Mat Sci, Educ Minist, Key Lab Resource Chem, Shanghai 200234, Peoples R China
[2] Kanagawa Univ, Dept Mat & Life Chem, Yokohama, Kanagawa 2218686, Japan
来源：
ACS APPLIED MATERIALS & INTERFACES | 2020年 / 12卷 / 26期
基金：
中国国家自然科学基金;
关键词：
Raman spectroscopy; enantio-differentiation; amino acids; chiral silica; polydopamine; silver; METAL NANOPARTICLES; RECOGNITION; SELECTION;
D O I：
10.1021/acsami.0c08780
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Polydopamine (PDA) and silver (Ag) nanoparticles were first generated on chiral silica nanofibers and then detached from silica to form PDA/Ag composites. The as-obtained PDA/Ag showed surface-enhanced Raman scattering (SERS) activity but very weak circular dichroism optical activity. Interestingly, the PDA/Ag substrates could make a pair of tyrosine (or phenylalanine) enantiomers show different Raman scattering signal intensities, where the differences could reach 3 times. In contrast, PDA/Ag prepared by using racemic or achiral silica did not exhibit such discrimination performance. Therefore, this research offered a novel SERS-based enantiomeric differentiation method with the assistance of plasmonic metal-containing substrates stemmed from intrinsically chiral inorganic silica.
引用
收藏
页码：29868 / 29875
页数：8
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