Department of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14850, USA.
Nano Lett. 2010 Jan;10(1):111-5. doi: 10.1021/nl9029847.
Telomers ionically tethered to nanometer-sized particles yield self-suspended, nanoparticle-laden liquids with unusual dynamical features. By subjecting these suspensions to controlled, modest shear strains, we find that their flow behaviors observed using experiments performed on time scales of tens of seconds can be projected to obtain maps of their dynamical response on geological time scales. That such extraordinarily slow dynamic processes can be uncovered from real-time measurements by simply stretching a system provides a simple but powerful tool for interrogating extremely slow motions in other jammed physical states.
带正电荷的端粒离子与纳米级颗粒结合,生成自悬浮的、负载纳米颗粒的液体,具有不同寻常的动力学特性。通过对这些悬浮液施加可控的适度剪切应变,我们发现,使用数十秒时间尺度上进行的实验观察到的它们的流动行为,可以通过投影来获得它们在地质时间尺度上的动力学响应图谱。通过简单地拉伸系统,从实时测量中揭示出如此极其缓慢的动态过程,为研究其他被堵塞的物理状态中的极缓慢运动提供了一个简单而强大的工具。