In situ velocity control of gliding microtubules with temperature monitoring by fluorescence excitation on a patterned gold thin film

In situ velocity control of gliding microtubules with temperature monitoring by fluorescence excitation on a patterned gold thin film
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通过图案化金薄膜上的荧光激发进行温度监测的滑动微管的原位速度控制

DOI:
10.1088/2053-1591/1/4/045405
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发表时间:
2014
影响因子:
2.3
通讯作者:
Ryuji Yokokawa
Ryuji Yokokawa
中科院分区:
材料科学4区
文献类型:
--
作者:
Tasuku Nakahara;Junya Ikuta;Hirofumi Shintaku;Hidetoshi Kotera;Ryuji Yokokawa

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在微流体环境中,微管滑动是一种很有前途的纳米致动器。然而,电机在速度、方向和寿命方面的可控性在工程上一直具有挑战性。在这里,我们使用荧光激发来控制光刻图案金表面上的MT速度。选择的激发波长与用于观察mt的波长相匹配。由于将电阻温度检测器(RTD)集成在涂覆运动蛋白马达的检测底物上,因此可以进行原位温度监测。当温度升高10.4℃时,镀金表面MTs的速度增加了1.8倍,这是由13.5 W·cm−2的辐照度引起的。我们实现了重复的速度控制,这完全是由于温度的增加,即辐照能量的增加。这一关键技术的发展实现了MT滑动的可逆和局部速度控制,可以很容易地集成到由电机驱动的纳米系统中。
Microtubule (MT) gliding on a kinesin-coated surface is a promising nanoactuator to manipulate nanomaterials in microfluidic environments. However, controllability of motors with respect to velocity, direction, and lifetime has been challenging for engineering purposes. Here, we used fluorescence excitation to control the MT velocity on a photolithographically patterned gold surface. The excitation wavelength was selected to match that used for the observation of MTs. Since a resistance temperature detector (RTD) was integrated on the assay substrate on which kinesin motors were coated, in situ temperature monitoring was implemented. Compared with the velocity of gliding MTs on the bare glass surface, the velocity increased by 1.8-fold on the gold-coated surface with the increase of temperature of 10.4 C, which was caused by irradiance of 13.5 W· cm− 2. We achieved repetitive velocity control, which was solely caused by the increase of temperature, ie, irradiation energy. This key technology development enables reversible and localized velocity control of MT gliding, which can be easily integrated in nanosystems driven by kinesin motors.
光异构化单层表面上驱动蛋白驱动的微管滑动运动的动态光控制。
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