通过介孔硅膜对发光硅纳米颗粒进行尺寸调谐。

Size tuning of luminescent silicon nanoparticles with meso-porous silicon membranes.

机构信息

Institute of High Technologies, Taras Shevchenko National University of Kyiv, 64 Volodymyrska Str., 01601 Kyiv, Ukraine.

出版信息

J Colloid Interface Sci. 2011 Dec 1;364(1):65-70. doi: 10.1016/j.jcis.2011.07.068. Epub 2011 Aug 6.

DOI:10.1016/j.jcis.2011.07.068

PMID:21890146

Abstract

Size tuning of silicon (Si) nanoparticles (NPs) with the use of meso-porous silicon (meso-PS) free-standing layers is reported for the first time. Accumulation of Si NPs inside the membrane pores during the filtering process (NP transport through the meso-PS) leads to an auto-filtration effect (called Si-by-Si (SBS) filtration) allowing more efficient size selection of the NPs. General complex fractal shape and surface chemistry of the whole porous network, layer thickness as well as a given initial NP size dispersion determine final size of the NPs in the filtered solution. Moreover, quantum of step-like NP size increasing equal to 0.12 nm was found.

摘要

首次报道了使用介孔硅（meso-PS）无定形层对硅（Si）纳米颗粒（NPs）进行尺寸调谐。在过滤过程中（NP 通过介孔 PS 的传输），Si NPs 在膜孔内积累，导致自动过滤效应（称为 Si-by-Si（SBS）过滤），从而能够更有效地对 NPs 进行尺寸选择。整个多孔网络的一般复杂分形形状和表面化学性质、层厚度以及给定的初始 NP 尺寸分散度决定了过滤溶液中 NP 的最终尺寸。此外，还发现 NP 尺寸呈阶跃式增加，步长为 0.12nm。