Hybrid Cyanine-Silica Nanoparticles: Homogeneous Photoemission Behavior of Entrapped Fluorophores and Consequent High Brightness Enhancement

被引：37

作者：

Alberto, Gabriele ^{[1
,3
]}

Miletto, Ivana ^{[1
,3
]}

Viscardi, Guido ^{[2
,3
]}

Caputo, Giuseppe ^{[1
,3
]}

Latterini, Loredana ^{[4
,5
]}

Coluccia, Salvatore ^{[1
,3
]}

Martra, Gianmario ^{[1
,3
]}

机构：

[1] Univ Turin, Dept IPM Chem, I-10125 Turin, Italy

[2] Univ Turin, Dept Gen & Organ Chem, I-10125 Turin, Italy

[3] Ctr Innovat, NIS Interdept Ctr Excellence, I-10135 Turin, Italy

[4] Univ Perugia, Dept Chem, I-06123 Perugia, Italy

[5] Univ Perugia, CEMIN, I-06123 Perugia, Italy

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 50期

关键词：

ELECTRONIC-PROPERTIES; POLYMETHINE SYSTEMS; DYES; CORE;

D O I：

10.1021/jp907415q

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Spherical hybrid cyanine-silica nanoparticles, quite homogeneous in size (ca 50 rim) were prepared by the reverse microemulsion Method. Solvatochromism tests indicated that all fluorophore molecules were actually entrapped within the inorganic matrix. The combination of steady-state and time-resolved fluorescence measurements allowed LIS to Conclude that almost all cyanine molecules exhibited the same photophysical behavior and this Suggested they should be dispersed in a monomeric form. Such behavior resulted in a significant brightness enhancement per Cubic nanometer of nanoparticle with respect to molecules ill Solution. The Occurrence of the optical interparticle effect by progressively decreasing the distance among hybrid nanoparticles passing from Suspension to a dry powder was also investigated.

引用

页码：21048 / 21053

页数：6

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