CAJ | 학술논문

利用自行搭建的扭转共振谱仪，研究了不同粒子体系胶体晶体在不同体积分数下的剪切模量，利用反射光谱测量了相应的晶体结构及内部孔洞等参数。结果表明，同一粒子体系的剪切模量均随体积分数的增加而增大；而对于同样的粒子数密度，不同粒子体系的剪切模量随体系内部孔洞所占比例增加呈增大趋势。对实验结果的分析及与理论分析的对比表明，决定胶体晶体剪切模量大小的主要因素是胶体晶体中粒子的最近邻间距，从而统一解释了体积分数和内部孔洞对胶体晶体剪切模量的影响。
이용자행탑건적뉴전공진보의，연구료불동입자체계효체정체재불동체적분수하적전절모량，이용반사광보측량료상응적정체결구급내부공동등삼수。결과표명，동일입자체계적전절모량균수체적분수적증가이증대；이대우동양적입자수밀도，불동입자체계적전절모량수체계내부공동소점비례증가정증대추세。대실험결과적분석급여이론분석적대비표명，결정효체정체전절모량대소적주요인소시효체정체중입자적최근린간거，종이통일해석료체적분수화내부공동대효체정체전절모량적영향。
Home-made torsional resonance spectroscopy was used to study the shear modulus of colloidal crys-tals formed by different particles at different volume fractions, while reflection spectrum was used to measure the corresponding crystal structure and internal voids etc. at the same time. The results indicate that shear modulus increases with volume fractions for colloidal crystals formed by same particles. And for colloidal crys-tals formed by different particles, the shear modulus has a tendency to increase with the increase of the fraction of internal voids for the same particle number density. Further analysis of the experimental results and the comparison with the theoretical analysis shows that the main factor influencing the shear modulus is the nearest interparticle distance, which explains the experimental findings.