Plasmonic optical trapping of nanometer-sized J-/H- dye aggregates as explored by fluorescence microspectroscopy

被引：16

作者：

Mototsuji, Ayaka ^{[1
]}

Shoji, Tatsuya ^{[1
]}

Wakisaka, Yumi ^{[2
]}

Murakoshi, Kei ^{[2
]}

Ya, Hiroshi ^{[3
]}

Tsuboi, Yasuyuki ^{[1
]}

机构：

[1] Osaka City Univ, Grad Sch Sci, Div Mol Mat Sci, Sumiyoshi Ku, 3-3-138 Sugimoto, Osaka 55588585, Japan

[2] Hokkaido Univ, Grad Sch Sci, Dept Chem, Sapporo, Hokkaido 0600810, Japan

[3] Univ Hyogo, Grad Sch Mat Sci, 3-2-1 Koto, Kamigori, Hyogo 6781297, Japan

来源：

OPTICS EXPRESS | 2017年 / 25卷 / 12期

关键词：

METALLIC-NANOSTRUCTURE; ORGANIC NANOPARTICLES; AQUEOUS-SOLUTION; NEAR-FIELD; MANIPULATION; TWEEZERS; NANOTWEEZERS; EXCITATION; ROTATION; LIGHT;

D O I：

10.1364/OE.25.013617

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In the present study, we explored plasmonic optical trapping (POT) of nanometer-sized organic crystals, carbocyanine dye aggregates (JC-1). JC-1 dye forms both J- and H- aggregates in aqueous solution. POT behavior was analyzed using fluorescence microspectroscopy. POT of JC-1 aggregates was realized in an increase in their fluorescence intensity from the focus area upon plasmon excitation. Repeating on-and-off plasmonic excitation resulted in POT of JC-1 aggregates in a trap-and-release mode. Such POT of nanometer-sized dye aggregates lying in a Rayleigh scattering regime (< 100 run) is important toward molecular manipulation. Furthermore, interestingly, we found that the J-aggregates were preferentially trapped than H-aggregates. It possibly indicates semi selective optical trapping of nanopartieles on the basis of molecular alignments. (C) 2017 Optical Society of America

引用

页码：13617 / 13625

页数：9