Hydration and Thermal Expansion in Anatase Nanoparticles

Journal Article · Mon Jun 06 00:00:00 EDT 2016 · Advanced Materials

DOI:https://doi.org/10.1002/adma.201600973· OSTI ID:1340531

Zhu, He ^[1]; Li, Qiang ^[1]; Ren, Yang ^[2]; Fan, Longlong ^[1]; Chen, Jun ^[1]; Deng, Jinxia ^[1]; Xing, Xianran ^[1]

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1. Department of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083 China
2. Argonne National Laboratory, X-Ray Science Division, Argonne IL 60439 USA

A tunable thermal expansion is reported in nanosized anatase by taking advantage of surface hydration. The coefficient of thermal expansion of 4 nm TiO2 along a-axis is negative with a hydrated surface and is positive without a hydrated surface. High-energy synchrotron X-ray pair distribution function analysis combined with ab initio calculations on the specific hydrated surface are carried out to reveal the local structure distortion that is responsible for the unusual negative thermal expansion.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NNSFC)
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1340531
• Journal Information: Advanced Materials, Vol. 28, Issue 32; ISSN 0935-9648
• Publisher: Wiley
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY