Orientation Selection during Heterogeneous Nucleation: Implications for Heterogeneous Catalysis

Chatterjee, Dipanwita and Akash, R and Kamalnath, K and Ahmad, Rafia and Singh, Abhishek Kumar and Ravishankar, N (2017) Orientation Selection during Heterogeneous Nucleation: Implications for Heterogeneous Catalysis. In: JOURNAL OF PHYSICAL CHEMISTRY C, 121 (18). pp. 10027-10037.

PDF Jou_Phy_Che_121-18_10027_2017.pdf - Published Version Restricted to Registered users only Download (4MB) | Request a copy

Abstract

Hybrids based on supported nanoparticles are used for many applications such as catalysis and sensing. It is well-known that the size and shape of the particles and: their interaction with the substrate play a key role in controlling the properties, of the hybrid. Here, we show that in addition to these commonly considered effects, the orientation Of the partide,on the:substrate could play a critical role that could dominate over the other effects. For the same nominal size of the particle, changes in its orientation on the substrate lead, to dramatic changes in the accessible, surface, area and the electronic structure, Thus profoundly affecting the properties. Using analytical calculations, we show that the orientation of the crystal, heterogeneously nucleating on; substrate, is determined by the, barrier for nucleation and experimentally demonstrate that it is possible to tune. this orientation by tuning the interfacial energy between the, nucleus and substrate. Our study provides some fundamentally new insights into the process, of heterogeneous nucleation, that can be exploited for practical applications.

Item Type:	Journal Article
Publication:	JOURNAL OF PHYSICAL CHEMISTRY C
Additional Information:	Copy right for this article belongs to the AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	10 Jun 2017 04:38
Last Modified:	10 Jun 2017 04:38
URI:	http://eprints.iisc.ac.in/id/eprint/57158

Actions (login required)

View Item