Well-defined assembly of plasmonic metal nanoparticles by dielectrophoresis for highly sensitive SERS-active substrates

被引：0

作者：

Yeo, Yun Su ^{[1
,3
]}

Park, Jaejun ^{[1
,3
]}

Yoo, Sunghoon ^{[1
,3
]}

Nam, Dong Hwan ^{[1
,3
]}

Kim, Hayoung ^{[1
,3
]}

Lee, Tae Jae ^{[4
]}

Leem, Gyu ^{[5
,6
]}

Kwon, Jae-Sung ^{[7
,8
,9
]}

Lee, Seunghyun ^{[1
,2
,3
]}

机构：

[1] Hanyang Univ ERICA, Dept Appl Chem, Ansan 15588, South Korea

[2] Hanyang Univ ERICA, Dept Energy & Bio Sci, Ansan 15588, South Korea

[3] Hanyang Univ ERICA, Ctr Bionano Intelligence Educ & Res, Ansan 15588, South Korea

[4] Natl NanoFab Ctr, Ctr Nanobio Dev, Daejeon 34141, South Korea

[5] SUNY Coll Environm Sci & Forestry, Dept Chem, 1 Forestry Dr, Syracuse, NY 13210 USA

[6] Inst Sustainable Mat & Mfg, 1 Forestry Dr, Syracuse, NY 13210 USA

[7] Incheon Natl Univ, Dept Mech Engn, Incheon 22012, South Korea

[8] Incheon Natl Univ, Convergence Res Ctr Insect Vectors CRCIV, Incheon 22012, South Korea

[9] Incheon Natl Univ, Nucl Safety Res Inst, Incheon 22012, South Korea

来源：

LAB ON A CHIP | 2025年

基金：

新加坡国家研究基金会;

关键词：

ENHANCED RAMAN-SCATTERING; SINGLE-MOLECULE; SPECTROSCOPY; IMMUNOASSAY; NANOANTENNA; DEPENDENCE; SEPARATION; RESONANCE; GRAPHENE; SIZE;

D O I：

10.1039/d5lc00238a

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

In this study, dielectrophoresis (DEP) was performed to develop highly sensitive surface- enhanced Raman scattering (SERS)-active substrates for molecular sensing. Substrates with a circular hole pattern were used, and plasmonic particles were trapped and immobilized along the edges of the pattern using dielectrophoretic forces. The arranged particles created hotspots, resulting in an enhanced SERS signal that was detectable even at concentrations as low as 10-10 M. This uniform arrangement provided a consistent signal over a large area. In addition, it was experimentally verified that the behavior of the particles varied with pattern diameter. This phenomenon was further supported by theoretical analysis. The proposed DEP-based SERS substrates are expected to be useful in various applications due to their excellent reproducibility and reliability.

引用

页数：8

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