In Situ Observation of the Humidity Controlled Polymorphic Phase Transformation in Glycine Microcrystals
authors Isakov, D; Petukhova, D; Vasilev, S; Nuraeva, A; Khazamov, T; Seyedhosseini, E; Zelenovskiy, P; Shur, VY; Kholkin, AL
nationality International
journal CRYSTAL GROWTH & DESIGN
keywords BETA-GLYCINE; GAMMA-GLYCINE; CRYSTALLIZATION; NANOSCALE; GROWTH; STATE; RULE
abstract Glycine is a model crystal exhibiting three polymorphic phases and important functional properties such as piezoelectricity and ferroelectricity. We report here in situ observation of the irreversible transformation of the solution-grown glycine crystals from a beta phase into a gamma phase. The slow transformation process was monitored by piezoresponse force microscopy at room temperature. The process of beta to gamma conversion was entirely controlled by the variation of relative humidity in the sample chamber. The results show that the rate of phase transformation in glycine is humidity dependent with a threshold of about 25% RH. It is demonstrated that the phase boundary is highly rugged and the transformation front propagates inhomogeneously along the polar axis of the beta phase. The mechanism of the phase transformation is discussed.
publisher AMER CHEMICAL SOC
issn 1528-7483
year published 2014
volume 14
issue 8
beginning page 4138
ending page 4142
digital object identifier (doi) 10.1021/cg500747x
web of science category Chemistry, Multidisciplinary; Crystallography; Materials Science, Multidisciplinary
subject category Chemistry; Crystallography; Materials Science
unique article identifier WOS:000340080400052
  ciceco authors
  impact metrics
journal analysis (jcr 2019):
journal impact factor 4.089
5 year journal impact factor 3.771
category normalized journal impact factor percentile 74.819
dimensions (citation analysis):
altmetrics (social interaction):



 


Apoio

1suponsers_list_ciceco.jpg