Optical tweezers

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  • Triple helical collagens are the most abundant structural protein in vertebrates and are widely used as biomaterials for a variety of applications including drug delivery and cellular and tissue engineering.

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  • Optical tweezers have been seen as an essential tool for manipulating dielectric microparticles and nanoparticles thanks to its non-contact action and high resolution of optical force. Up to now, there has been a lot of optical tweezers applications in the fields of biophysics, chemistry, medical science and nanoscience. Recently, optical tweezers have been theoretically and experimentally developed for the nano mechanical characterization of various kinds of biological cells.

    pdf18p viaphrodite2711 14-10-2019 15 2   Download

  • The systematical equations using to control the trapped particles in 3D space of acoustic-optical tweezers is introduced. The factors influencing on the position of trapped particles in 3D space is discussed. The trajectories of trapped particle under the different single tweezers are theoretically observed by the change of acoustic frequency.

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  • An optical system to transform the laser Gaussian beam into the Hollow-Gaussian one is proposed and designed. Based on the principles of ray optics, the expressions describing the laser intensity distribution behind optical system and optical transverse gradient force acting on the both low- (refractive index ratio, m

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  • In this paper, we numerically observed the trajectories of free bead in embedding fluid under the nonlinear optical tweezers using thin layer of Acid Blue 29 (NOTAB). Using the set of general Langevin equations describing motions of particles in trapping region, the influence of some parameters on free bead’s trajectories is investigated by the finite difference method.

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  • The results show that the stabe region of the optical tweezer depends on the nonlinear coefficient of refractive index. Moreover, the stable region could be brokendown with a critical value of the nonlinear coefficient of refractive index of the surrounding medium irradiated by Gaussian laser pulse described by given parameters as intensity, duration and radius of beam waist.

    pdf7p thuyliebe 12-10-2018 29 0   Download

  • In this article, the micro-particle sieving capability of optical tweezers arrays in Germanium modulated by ultrasonic waves is presented. The sieving processes are controlled by changing of initial phase or intensity and frequency of ultrasonic waves. The simulation results show that the optical tweezers arrays will act as the dynamical one, which can sieve the dielectric micro-particles in 3D space in the embedding fluid.

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  • About a decade ago, the elastic properties of a single chromatin fiber and, subsequently, those of a single nucleosome started to be explored using optical and magnetic tweezers. These techniques have allowed direct mea-surements of several essential physical parameters of individual nucleo-somes and nucleosomal arrays, including the forces responsible for the maintenance of the structure of both the chromatin fiber and the individual nucleosomes

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  • Tham khảo sách 'applications of monte carlo method in sciencapplications of monte carlo method in science and engineering_1e and engineering_1', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • In this book, Applications of Monte Carlo Method in Science and Engineering, we further expose the broad range of applications of Monte Carlo simulation in the fields of Quantum Physics, Statistical Physics, Reliability, Medical Physics, Polycrystalline Materials, Ising Model, Chemistry, Agriculture, Food Processing, X-ray Imaging, Electron Dynamics in Doped Semiconductors, Metallurgy, Remote Sensing and much more diverse topics. The book chapters included in this volume clearly reflect the current scientific importance of Monte Carlo techniques in various fields of research....

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  • Micromechanical photonics is evolvingin interdisciplinary research and engineering fields and merging independently developed technologies based on optics, mechanics, electronics, and physical/chemical sciences. Manufacturing technologies such as those of semiconductor lasers, surface micromachining and bulk micromachiningare promotingtec hnology fusion.

    pdf259p beobobeo 01-08-2012 52 5   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Translation and manipulation of silicon nanomembranes using holographic optical tweezers

    pdf7p dauphong12 07-02-2012 30 3   Download



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