气凝胶：具有超长激子寿命和高光致荧光量子产率的 CdSe/CdS 纳米棒气凝胶（Adv. Mater. 40/2015）。

Aerogels: Aerogels from CdSe/CdS Nanorods with Ultra-long Exciton Lifetimes and High Fluorescence Quantum Yields (Adv. Mater. 40/2015).

机构信息

Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstr. 3A, D-30167, Hannover, Germany.

出版信息

Adv Mater. 2015 Oct 28;27(40):6151. doi: 10.1002/adma.201570270.

DOI:10.1002/adma.201570270

PMID:26487019

Abstract

The fabrication of gels from semiconductor nanoparticles by means of a controlled and optimized destabilization process is investigated by N. C. Bigall and co-workers on page 6152. Aerogels with high photoluminescence quantum yield and ultra-long radiative lifetimes are fabricated from CdSe/CdS seeded nanorods. It is shown that excited electrons can be delocalized within the aerogel monolith while, at the same time, holes stay confined in the CdSe cores. This type of assembly of nanoparticles shows novel properties in comparison to those of the nanoparticle building blocks and of the bulk material.

摘要

N. C. Bigall 等人研究了通过受控和优化的失稳过程从半导体纳米粒子制备凝胶。CdSe/CdS 种子纳米棒制备出具有高光致发光量子产率和超长辐射寿命的气凝胶。结果表明，在气凝胶整体中，激发电子可以离域，而同时，空穴仍局限在 CdSe 核中。与纳米颗粒构建块和体材料相比，这种纳米颗粒的组装具有新颖的性质。