Crack and size-dependence of shear modulus in a drying particulate film  

作　　者：CAO He LAN Ding WANG YuRen 

机构地区：[1]Key Laboratory of Microgravity(National Micrograviry Laboratory),Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China [2]Institute of Microelectronics,Chinese Academy of Sciences,Beijing 100029,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2012年第6期1093-1097,共5页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Basic Research Program of China (Grant No. 2011CB710901);the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No. KJCX2-YW-L08)

摘　　要：We utilized controlled vertical drying deposition (CVDD) method,which can fabricate a uniform face-center-cubic (FCC) structure film,to investigate the crack formation and the size dependence of shear modulus in a drying particulate film.We found that both crack spacing and shear modulus depend on colloidal particle size.They drop with increase of particle radius (R) in a single range.Furthermore,compared with the shear modulus variation of a dry particulate film,it was found that both solid part and liquid part in a drying particulate film play equivalent roles in the film mechanical behavior.We utilized controlled vertical drying deposition （CVDD） method,which can fabricate a uniform face-center-cubic （FCC） structure film,to investigate the crack formation and the size dependence of shear modulus in a drying particulate film.We found that both crack spacing and shear modulus depend on colloidal particle size.They drop with increase of particle radius （R） in a single range.Furthermore,compared with the shear modulus variation of a dry particulate film,it was found that both solid part and liquid part in a drying particulate film play equivalent roles in the film mechanical behavior.

关 键 词：crack formation size dependence shear modulus colloidal film 

分 类 号：O484.43[理学—固体物理] TU435[理学—物理]