Nanoscale rheology at solid-complex fluid interfaces
Nanoscale rheology at solid-complex fluid interfaces
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固体-复合流体界面的纳米级流变学
DOI：
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发表时间：
2017
影响因子：
4.6
通讯作者：
H. Frielinghaus
中科院分区：
文献类型：
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作者：
S. Jaksch;O. Holderer;M. Gvaramia;M. Ohl;M. Monkenbusch;H. Frielinghaus
在这里，我们提出了一种方法来测量动态膜性能的磷脂膜接近接口。作为一个例子，我们展示了固体基板（硅）上的磷脂膜多层堆叠的膜动力学的结果。在这个样品上，我们能够使用掠入射中子自旋回波光谱（GINSES）测量局部相互作用和摩擦参数，其中倏逝中子波探测接近刚性界面的波动。利用这种方法，可以访问纳米到微米区域的长度尺度以及μeV范围内的能量。使用一种新的中子谐振腔结构，我们实现了所需的强度增益为这个实验。在我们的调查中，我们发现了磷脂膜的激发模式，以前没有报道过，只有使用新的方法才能看到。我们推测，通过这种波动传输的能量也可以用来分配能量在一个更大的面积的膜，稳定it.This新的方法有能力探测生物膜的粘弹性效应，成为一个新的工具，在纳米级的摩擦学，并允许观察到迄今为止看不见的属性磷脂膜使用中子。
Here we present an approach to measure dynamic membrane properties of phospholipid membranes close to an interface. As an example we show results of the membrane dynamics of a phospholipid membrane multilayer-stack on a solid substrate (silicon). On this sample we were able to measure local interaction and friction parameters using Grazing Incidence Neutron Spin Echo Spectroscopy (GINSES), where an evanescent neutron wave probes the fluctuations close to a rigid interface. With this method it is possible to access length scales in the nano to micrometer region as well as energies in the μeV range. Using a new neutron resonator structure we achieved the required intensity gain for this experiment. During our investigations we found an excitation mode of the phospholipid membrane that has not been reported previously and only became visible using the new methodology. We speculate that the energy transported by that undulation can also serve to distribute energy over a larger area of the membrane, stabilizing it. This new methodology has the capability to probe the viscoelastic effects of biological membranes, becoming a new tool for tribology on the nanoscale and has allowed the observation of the hitherto invisible property of phospholipid membranes using neutrons.
时间分辨漫射 X 射线散射光激发脂质多层中的非平衡集体动力学
影响因子：
8.6
作者：
Reusch T;Mai DD;Osterhoff M;Khakhulin D;Wulff M;Salditt T
通讯作者：
Salditt T