Wei Ning, Wang Hui-Qiong, Zheng Jin-Cheng
Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen, 361005, China.
Nanoscale Res Lett. 2012 Feb 26;7(1):154. doi: 10.1186/1556-276X-7-154.
A method was proposed to manipulate nanoparticles through a thermal gradient. The motion of a fullerene molecule enclosed inside a (10, 10) carbon nanotube with a thermal gradient was studied by molecular dynamics simulations. We created a one-dimensional potential valley by imposing a symmetrical thermal gradient inside the nanotube. When the temperature gradient was large enough, the fullerene sank into the valley and became trapped. The escaping velocities of the fullerene were evaluated based on the relationship between thermal gradient and thermophoretic force. We then introduced a new way to manipulate the position of nanoparticles by translating the position of thermostats with desirable thermal gradients. Compared to nanomanipulation using a scanning tunneling microscope or an atomic force microscope, our method for nanomanipulation has a great advantage by not requiring a direct contact between the probe and the object.
提出了一种通过热梯度操纵纳米颗粒的方法。通过分子动力学模拟研究了在具有热梯度的(10, 10)碳纳米管内的富勒烯分子的运动。我们通过在纳米管内施加对称热梯度创建了一个一维势谷。当温度梯度足够大时，富勒烯沉入谷中并被困住。基于热梯度与热泳力之间的关系评估了富勒烯的逃逸速度。然后，我们引入了一种通过平移具有所需热梯度的恒温器位置来操纵纳米颗粒位置的新方法。与使用扫描隧道显微镜或原子力显微镜进行纳米操纵相比，我们的纳米操纵方法具有很大优势，因为它不需要探针与物体直接接触。
