Enhanced photoluminescence of porous silicon nanoparticles coated by bioresorbable polymers

被引：20

作者：

Gongalsky, Maxim B. ^{[1
]}

Kharin, Alexander Yu ^{[1
]}

Osminkina, Liubov A. ^{[1
]}

Timoshenko, Victor Yu ^{[1
]}

Jeong, Jinyoung ^{[2
,3
]}

Lee, Han ^{[2
,3
]}

Chung, Bong Hyun ^{[2
,3
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119991, Russia

[2] Univ Sci & Technol, Taejon 305806, South Korea

[3] Korea Res Inst Biosci & Biotechnol, BioNanotechnol Res Ctr, Taejon 305806, South Korea

来源：

NANOSCALE RESEARCH LETTERS | 2012年 / 7卷

基金：

俄罗斯基础研究基金会;

关键词：

Silicon nanoparticles; Porous silicon; Bioimaging; Polymer coating; Photoluminescence; BIOMEDICAL APPLICATIONS; OPTICAL-PROPERTIES; CANCER-CELLS; QUANTUM DOTS; NANOCRYSTALS; PHOTOSENSITIZERS; OXYGEN;

D O I：

10.1186/1556-276X-7-446

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A significant enhancement of the photoluminescence (PL) efficiency is observed for aqueous suspensions of porous silicon nanoparticles (PSiNPs) coated by bioresorbable polymers, i.e., polylactic-co-glycolic acid (PLGA) and polyvinyl alcohol (PVA). PSiNPs with average size about 100 nm prepared by mechanical grinding of electrochemically etched porous silicon were dispersed in water to prepare the stable suspension. The inner hydrophobic PLGA layer prevents the PSiNPs from the dissolution in water, while the outer PVA layer makes the PSiNPs hydrophilic. The PL quantum yield of PLGA/PVA-coated PSiNPs was found to increase by three times for 2 weeks of the storage in water. The observed effect is explained by taking into account both suppression of the dissolution of PSiNPs in water and a process of the passivation of nonradiative defects in PSiNPs. The obtained results are interesting in view of the potential applications of PSiNPs in bioimaging.

引用

页数：7

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