Phonon dispersion and elastic moduli of two-dimensional disordered colloidal packings of soft particles with frictional interactions

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	Phonon dispersion and elastic moduli of two-dimensional disordered colloidal packings of soft particles with frictional interactions
	Still, T ; Goodrich, CP ; Chen, K ; Yunker, PJ ; Schoenholz, S ; Liu, AJ ; Yodh, AG
刊名	PHYSICAL REVIEW E
	2014
卷号	89 期号:1
ISSN号	1539-3755
通讯作者	Still, T (reprint author), Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA.
中文摘要	Particle tracking and displacement covariance matrix techniques are employed to investigate the phonon dispersion relations of two-dimensional colloidal glasses composed of soft, thermoresponsive microgel particles whose temperature-sensitive size permits in situ variation of particle packing fraction. Bulk, B, and shear, G, moduli of the colloidal glasses are extracted from the dispersion relations as a function of packing fraction, and variation of the ratio G/B with packing fraction is found to agree quantitatively with predictions for jammed packings of frictional soft particles. In addition, G and B individually agree with numerical predictions for frictional particles. This remarkable level of agreement enabled us to extract an energy scale for the interparticle interaction from the individual elastic constants and to derive an approximate estimate for the interparticle friction coefficient.
资助信息	NSF, through PENN MRSEC [DMR11-20901, DMR12-05463]; Graduate Fellowship (CPG); NASA [NNX08AO0G]; DAAD
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59577]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Still, T,Goodrich, CP,Chen, K,et al. Phonon dispersion and elastic moduli of two-dimensional disordered colloidal packings of soft particles with frictional interactions[J]. PHYSICAL REVIEW E,2014,89(1).
APA	Still, T.,Goodrich, CP.,Chen, K.,Yunker, PJ.,Schoenholz, S.,...&Yodh, AG.(2014).Phonon dispersion and elastic moduli of two-dimensional disordered colloidal packings of soft particles with frictional interactions.PHYSICAL REVIEW E,89(1).
MLA	Still, T,et al."Phonon dispersion and elastic moduli of two-dimensional disordered colloidal packings of soft particles with frictional interactions".PHYSICAL REVIEW E 89.1(2014).