Dispersions of alkyl-capped silicon nanocrystals in aqueous media: photoluminescence and ageing

文献信息

发布日期 2008-08-05

DOI 10.1039/B801921E

影响因子 4.616

作者

N. Al-Sharif, C. E. M. Berger, H. K. Datta, L. Šiller

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摘要

Alkyl-capped silicon nanocrystals can be dispersed in aqueous media by shaking or stirring their solutions in organic solvents (DMSO, ether, THF) with excess water. THF is the most straightforward choice with which to prepare stable aqueous dispersions, because the nanocrystals are very soluble in THF and it is also miscible with water. As little as 0.01% v/v tetrahydrofuran is sufficient. DMSO and ether were the preferred choices for subsequent staining of live cells because THF shows some acute toxicity even when very dilute. The luminescence intensity of the aqueous dispersions is linear in particle concentration and independent of pH over the range 5–9. The sols retain their photoluminescence and are stable against flocculation for at least 6 months.

期刊推荐

Russian Chemical Reviews

Organic Preparations and Procedures International

Science Progress

Pharmacological Reviews

Nature

Journal of Organometallic Chemistry

Journal of Heterocyclic Chemistry

European Journal of Wood and Wood Products

Science

Fibre Chemistry

来源期刊

Analyst

CiteScore: 7.8

自引率: 5.6%

年发文量: 653

Analyst publishes analytical and bioanalytical research that reports premier fundamental discoveries and inventions, and the applications of those discoveries, unconfined by traditional discipline barriers.

Dispersions of alkyl-capped silicon nanocrystals in aqueous media: photoluminescence and ageing

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