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| 1 | Translocation of polymer through nanopore:dissipative particle dynamics simulation显示文摘Dissipative particle dynamics simulations are performed to study the forced translocation of polymer through a nanopore inside which the polymer experiences a driving force F.Hydrodynamic interaction(HI) is taken into account for the polymer in good solvent.We find that the mean translocation time<τ>scales with the polymer length N as<τ>~Nx with a = 1.26 ± 0.03 close to a theoretical prediction,and the probability distribution of s can be described by a Gaussian function.Our results show that the dynamics of polymer translocation with the HI is different from that without the HI.However,the exponent d in the scaling<τ>~δ F-dis found not to be affected by the HI effect. | Meng-Bo Luo | 2014 | Chinese Science Bulletin2014，59，35： | 3 |
| 2 | 基于高分子聚合物及毛细玻璃管的固态单纳米孔通道在分析化学中的应用显示文摘纳米孔检测技术以其独特的优势在电分析化学领域引起广泛的关注,基于此构建的电化学传感器及电化学整流开关已被用于多种目标物分析,如单分子蛋白检测及DNA测序。纳米孔既可由生物分子制成,也可由固态材料制备。其中,固态纳米孔易于修饰,机械性能、稳定性等相对较好,应用较为广泛。纳米孔检测技术主要的输出信号为电阻脉冲和电流-电压曲线(离子整流),本文以两种输出信号为重点,详细介绍了纳米孔检测的原理和应用,总结了近年来固态单纳米孔通道在分析化学领域的发展,并对该领域未来的发展趋势和应用前景进行了展望。 | 翟庆峰 李敬 汪尔康 | 2018 | 分析化学2018，46，6： | 3 |
| 3 | Fabrication of all-transparent polymer-based and encapsulated nanofluidic devices using nano-indentation lithography显示文摘In this paper,we describe a novel and simple process for the fabrication of all-transparent and encapsulated polymeric nanofluidic devices using nano-indentation lithography.First,a nanomechanical probe is used to‘scratch’nanoscale channels on polymethylmethacrylate(PMMA)substrates with sufficiently high hardness.Next,polydimethylsiloxane(PDMS)is used twice to duplicate the nanochannels onto PDMS substrates from the‘nano-scratched’PMMA substrates.A number of experiments are conducted to explore the relationships between the nano-indentation parameters and the nanochannel dimensions and to control the aspect ratio of the fabricated nanochannels.In addition,traditional photolithography combined with soft lithography is employed to fabricate microchannels on another PDMS‘cap’substrate.After manually aligning the substrates,all uncovered channels on two separate PDMS substrates are bonded to achieve a sealed and transparent nanofluidic device,which makes the dimensional transition from microscale to nanoscale feasible.The smallest dimensions of the achievable nanochannels that we have demonstrated thus far are of~20 nm depth and~800 nm width,with lengths extendable beyond 100μm.Fluid flow experiments are performed to verify the reliability of the device.Two types of colloidal solution are used to visualize the fluid flow through the nanochannels,that is,ethanol is mixed with gold colloid or fluorescent dye(fluorescein isothiocyanate),and the flow rate and filling time of liquid in the nanochannels are estimated based on time-lapsed image data.The simplicity of the fabrication process,bio-compatibility of the polymer substrates,and optical transparency of the nanochannels for flow visualization are key characteristics of this approach that will be very useful for nanofluidic and biomolecular research applications in the future. | Cong Wu Tiffany G.Lin Zhikun Zhan Yi Li Steve C.H.Tung William C.Tang Wen J.Li | 2017 | Microsystems & Nanoengineering2017，3，1： | 2 |
| 4 | 基于聚合物膜的仿生纳米通道显示文摘在生物体内,细胞膜上的离子通道可以通过选择性地传输离子参与生命活动.受生物体内传输通道结构和功能的启发,具有实际应用价值的人工离子纳米通道备受关注.基于高分子材料的仿生纳米通道具有机械稳定性、离子输运性能优异和可设计性强等特点.本文主要介绍了基于聚合物的仿生纳米通道的制备及其在环境响应性生物传感和能量转换方面的应用.首先介绍了纳米通道在离子传输调控和能量转换方面的基本特性.之后,我们讨论了聚合物基纳米通道材料的制备方法,并强调了它们相对于其他材料的优势.详细讨论了聚合物基仿生纳米通道在能量转换和环境响应生物传感器中的实际应用.最后,总结了仿生纳米通道研究中尚未解决的问题,并对该领域的进一步发展方向进行了展望. | 马贺 王松 于冰 随欣 申有青 丛海林 | 2021 | Science China Materials2021，64，6： | 0 |
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