Due to the advances in nanotechnology and its growing of potential applications, it is evident that the development of practical technologies for the manipulation of nanostructures is essential. The focus of this dissertation is to develop an integrated nanomanipulation system that would be able to image, manipulate as well as fabricate micro/nano-scaled structures in a controlled manner. The system consists of four main components: an Atomic Force Microscope (AFM) for obtaining topographic information of sample surfaces, a haptic device controlled by a server which generates the force environment, a molecular dynamics simulation for determinations of the effects of force application on nano particles, and a visualization program for display of the results. An extended platform with high precision and accuracy is included for broadening the workspace. The interface would be implemented for direct interaction with nano molecules. The users are then allowed to see, touch and manipulate such particles. By the principle of contact mechanics, the tip-sample interaction forces and intermolecular forces between the tip and surface can be modeled; calculated forces are used to predict the results of each operation. The proposed nanomanipulation model facilitates further improvement to accommodate other physical phenomena that characterize the mechanics of nanomanipulation. / Nanotechnology has been defined as a description of activities at the atomic level that have applications in the real world. Advances in the field of nanotechnology have expanded the breadth of potential applications tremendously in recent years, which also leads to rapid growth of several research and development areas throughout the world. Recent development in microelectronics, nano-optics and generic chips shows the trend driving towards miniaturization. Gaining access to the nano world also enable us to make further advances in obtaining precise measurement of material properties and exploring fundamental physical laws at the atomic level. / The aim for developing such an integrated system is for prototyping of optics components with micro/nano structures, especially for diffractive optics elements (DOE) and optical lightguide. Diffractive optics is a transmissive diffraction grating with a series of closely ruled lines on a piece of transmissive substrate, A collimated beam of monochromatic light incident on a grating will result in the defined light diffraction pattern. The lightguide is being commonly adopted in backlight system, the spatially varying extraction pattern will couple flux out of the light guide to produce a spatially uniform luminance distribution. Determining the ruled lines for diffraction grating and extraction pattern for lightguide is greatly facilitated through the use of optimization. With the imposition of nonlinear constraints, optimization is achieved by incorporating the approximating function into an optimization algorithm. The micro/nano patterns on DOE and optical lightguide are feasible to be fabricated by the integrated nanomanipulation system with the AFM probe tip as a cutting tool. The characteristics of the AFM probe tip are also taken into account when designing the optical elements. / The developed system has been validated by different experiments, including raster scanning, nanoindentation and nanomanipulation testing. New application of nanomanipulation in photonics has been explored. With the proposed nanostructure fabrication techniques, several optical components can be fabricated in a more efficient and cost-effective way. / Fok, Lo Ming. / Adviser: Yun Hui Lin. / Source: Dissertation Abstracts International, Volume: 71-01, Section: B, page: 0611. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2009. / Includes bibliographical references (leaves 121-123). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. Ann Arbor, MI : ProQuest Information and Learning Company, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstracts in English and Chinese.
| Identifer | oai:union.ndltd.org:cuhk.edu.hk/oai:cuhk-dr:cuhk_344389 |
| Date | January 2009 |
| Contributors | Fok, Lo Ming., Chinese University of Hong Kong Graduate School. Division of Automation and Computer-Aided Engineering. |
| Source Sets | The Chinese University of Hong Kong |
| Language | English, Chinese |
| Detected Language | English |
| Type | Text, theses |
| Format | electronic resource, microform, microfiche, 1 online resource (ix, 123 leaves : ill.) |
| Rights | Use of this resource is governed by the terms and conditions of the Creative Commons “Attribution-NonCommercial-NoDerivatives 4.0 International” License (http://creativecommons.org/licenses/by-nc-nd/4.0/) |
Page generated in 0.0016 seconds