title: Conducting the temperature-dependent conformational change of macrocyclic compounds to the lattice dilation of quantum dots for achieving an ultrasensitive nanothermometer.
abstract: We report a ligand decoration strategy to enlarge the lattice dilation of quantum dots (QDs), which greatly enhances the characteristic sensitivity of a QD-based thermometer. Upon a multiple covalent linkage of macrocyclic compounds with QDs, for example, thiolated cyclodextrin (CD) and CdTe, the conformation-related torsional force of CD is conducted to the inner lattice of CdTe under altered temperature. The combination of the lattice expansion/contraction of CdTe and the stress from CD conformation change greatly enhances the shifts of both UV-vis absorption and photoluminescence (PL) spectra, thus improving the temperature sensitivity. As an example, β-CD-decorated CdTe QDs exhibit the 0.28 nm shift of the spectra per degree centigrade (0.28 nm/°C), 2.4-fold higher than those of monothiol-ligand-decorated QDs.
authors: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China.
authors: Ding
authors: D
authors: Zhou
authors: Min
authors: M
authors: Lin
authors: Xun
authors: X
authors: Liu
authors: Jing
authors: J
authors: Li
authors: Zhaolai
authors: Z
authors: Chen
authors: Dong
authors: D
authors: Yao
authors: Haizhu
authors: H
authors: Sun
authors: Hao
authors: H
authors: Zhang
authors: Bai
authors: B
authors: Yang