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Gongalsky MB, Kharin AY, Osminkina LA, et al. Enhanced photoluminescence of porous silicon nanoparticles coated by bioresorbable polymers. Nanoscale Res Lett. 2012;7(1):446doi: 10.1186/1556-276X-7-446.
Gongalsky, M. B., Kharin, A. Y., Osminkina, L. A., Timoshenko, V. Y., Jeong, J., Lee, H., & Chung, B. H. (2012). Enhanced photoluminescence of porous silicon nanoparticles coated by bioresorbable polymers. Nanoscale research letters, 7(1), 446. https://doi.org/10.1186/1556-276X-7-446
Gongalsky, Maxim B, et al. "Enhanced photoluminescence of porous silicon nanoparticles coated by bioresorbable polymers." Nanoscale research letters vol. 7,1 (2012): 446. doi: https://doi.org/10.1186/1556-276X-7-446
Gongalsky MB, Kharin AY, Osminkina LA, Timoshenko VY, Jeong J, Lee H, Chung BH. Enhanced photoluminescence of porous silicon nanoparticles coated by bioresorbable polymers. Nanoscale Res Lett. 2012 Aug 08;7(1):446. doi: 10.1186/1556-276X-7-446. PMID: 22873790; PMCID: PMC3464699.
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Nanoscale Res Lett. 2012 Aug 08;7(1):446. doi: 10.1186/1556-276X-7-446.

Enhanced photoluminescence of porous silicon nanoparticles coated by bioresorbable polymers.

Nanoscale research letters

Maxim B Gongalsky, Alexander Yu Kharin, Liubov A Osminkina, Victor Yu Timoshenko, Jinyoung Jeong, Han Lee, Bong Hyun Chung

Affiliations

  1. Physics Department, Lomonosov Moscow State University, Leninskie Gory 1, Moscow, 119991, Russia. [email protected].

PMID: 22873790 PMCID: PMC3464699 DOI: 10.1186/1556-276X-7-446

Abstract

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.

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