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Nanoparticle nanomaterials characterization Semiconductor thin film characterization Some of my other good sites:- External Sites Nanotechnology Free downloads papers,articles,reports. Site on Carbon Nanotube CNT SWNT Investing Stocks companies in Nanotechnology MEMS Nanotechnology Free download Pdf papers. Free Pdf papers- Nanotechnology Fabrication and Nanomanufacturing. Nano biotechnology - research investing nanomedicine Nanoelectronics Free downloads Nanophysics free downloads |
Nanotechnology characterization, particle characterization, surface characterization, thin film characterization, semiconductor characterization, material characterization, nanoparticle characterization free downloads papers articles reportsFree downloads Part 1 Topographic characterization and electrostatic response of M-DNA studied by atomic force microscopy Abstract Modified DNA species have attracted the interest of the scientific community in the last years in a search for an appropriate molecular wire for the incoming nanotechnology. M -DNA, a complex of DNA with divalent metallic ions, is one of the candidates for a molecular wire. In this paper we describe the procedure to fabricate M -DNA using NiCl and CoCl , and a 2 2 simple test to check the production of the modified biomolecule. We present atomic force microscope (AFM) images of nickel and cobalt M -DNA. Our results show that the DNA modified with these metal ions suffers a fivefold reduction in length and an increment of almost one order of magnitude in height as compared to the length and height of regular B-DNA. This type of condensation of the DNA is fully reversible upon the addition of EDTA. AFM images of reversed M -DNA show no differences from regular B-DNA. Two types of electrostatic experiment performed on this modified molecule show no evidence for metallic or semiconductor behaviour. Advanced Characterization Techniques in Optics for Nanostructures Boston University, Boston, MA 02215 http://ultra.bu.edu 4The Institute of Optics, University of Rochester, Rochester, NY 14627 The developments in nanotechnology present an outstanding challenge to characterization (measurement) technology by requiring nm-scale 3-D measurement capabilities. While the technology for synthesis has rapidly advanced, optical characterization of nanostructures is still in its infancy. Our NIRT Program [1] is building on the existing expertise and infrastructure at Boston University and University of Rochester and developing a toolbox of novel nano-optical characterization techniques to discover and understand the novel properties of nanostructures. Solid immersion lens (SIL) microscopy techniques combined with enhancement with nanoscale metal-tips will provide unprecedented resolution for spectroscopy of quantum dots and other semiconductor systems. The ultimate goal of the proposed program is to develop robust and efficient optical techniques at a spatial resolution on the order of 10 nm. Micro- and Nano-Antennas for Light Detection Antenna-coupled optical detectors, also named as optical antennas, are being developed as detection devices with micro- and nano-scale features for their use in the millimetre, infrared, and visible spectral range. They are optical components that couple the electromagnetic radiation in the visible and infrared wavelengths in the same way that radioelectric antennas do at the corresponding wavelengths. Optical antennas show polarization dependence, tuneability, and rapid time of response. They also cann be cosndiered as point detectors and directionally sensitive elements. So far, these detectors have been operated in the mid-infrared with positive results in the visible. The measurement and characterization of optical antennas requires the use of an experimental set-up with nanometric resolution. On the other hand, a computational simulation of the interaction between the material structures and the incoming electromagnetic radiation is needed to explore alternative designs of practical devices. In this contribution we will present the concept of optical and infrared antennas, and some experimental results of their performance, along with the experimental set-up arranged for their characterization in the visible. Characterization of metallic nano-particles via surface wave scattering: A. Theoretical framework and formulation Abstract Characterization of nano-size particles and structures are crucial for successful application of self- assembly processes that lead to bottom-up machining and manufacturing concepts. Conventional light- based approaches cannot be used for these purposes, mainly because the particle and structure sizes are much smaller than the wavelength of visible light. To overcome this problem, we are in the process of developing a diagnostic tool based on surface-wave scattering. In this paper, we outline the governing equations required to describe the scattering of the electromagnetic field by a particle located near a film. The formulation given here is for a general case; a special application of this work to surface waves can be obtained by considering the fields propagating at near grazing angles. This work constitutes the theoretical frame work needed for the characterization of nano-particles on or above a thin metallic film via scattered surface waves, which is outlined in Part B (JQSRT (2004)). Published by Elsevier Ltd. Atomic Force Microscope Probe based Controlled Pushing for Nano-Tribological Characterization Abstract—Using an Atomic Force Microscope (AFM) probe as a nano-manipulator, micrometer- and nanometer-sized objects, especially particles, are pushed on substrates for characterizing the object-substrate friction parameters and behavior in various environments, e.g. air, liquid and vacuum. Two possible nano- tribological characterization methods are proposed in this paper: (1) Sliding the micro/nano-object on the substrate while it is attached to an AFM probe, (2) Nano-robotic pushing of the micro/nano-object with the sharp tip of an AFM probe. Modeling of these methods are realized and experiments are conducted for the latter method using a piezoresistive AFMprobe as a 1-D force sensor and nano-manipulator. In the experiments, 500 nm radius gold-coated latex particles are pushed on a silicon substrate. Preliminary results show that different frictional behavior such as sliding, rolling, and rotation could be observed, and shear stresses and frictional behavior could be estimated using these techniques at the nano-scale. Mechanical Characterization of Nanofiber-Reinforced Composite Adhesives Tensile and shear strength tests of metal/metal and polymer/polymer joints featuring a new func- C tionalized nanofiber/epoxy composite adhesive were conducted. Strength increase is not as high as we expected (only up to 30%) although we used GCNF-ODA reactive linkers to improve the inter- O face. The moderate strength increase is due to high interfacial stress developed in nanocomposites M because of the high stiffness property mismatch, and inefficient interfacial shear stress transfer M through shear-lag mechanism. In order to design strong nanocomposite materials, continuous or at U N least aligned nanofibers/nanotubes should be employed. Structural Characterization of Nanotubes Fibres by X--ray Scattering REPORT OF US-India Workshop on Nanotechnology: Issues in Interdisciplinary Research and Education (Aug. 11-13; 2004; at IISc Bangalore) Characterization of Layer by Layer devices fabricated by nanotechnology ABSTRACT We report the growth proc ess of multilayer thinf ilms based on Layer by Layer (LBL) deposition of nanoparticles. The LBL thin f ilms were constructed with zinc sulphide nanoparticles (ZnS) capped with a pos itively charged p olyelectrolyte (chitosan), and gold nanoparticles stabilized by negatively charged radicals (electrostatic stabilization) . This LBL process of self assembly of alternate monolayers of nanopar ticles &po lyelectrolyte and subsequently sandwiched multilayers were grown on substrates. In this report, we present the growth devices by sequential depositio n and its I-V characteristics. Devices with rep eatable electrical characteristics could be grown with the onset voltage f or conduction moving to higher values f or thick devices. Title: Nano-scale Characterization of Materials Syllabus Course description Nanostructures are the smallest human-made objects exhibiting novel physical, chemical, and biological properties. The emerging field of nanoscience and nanotechnology is leading to a technological revolution in the 21st millennium. In contrast to conventional technologies, nanotechnologies operate on molecular levels to create and utilize materials, devices, and systems with fundamentally new molecular organization. The course introduces students to the concepts and principles of nanotechnology and advanced instrumentation for the characterization of materials and structures at nanoscale. Work at the W.M. Keck Foundation Laboratory will provide students with hands-on ability to operate advanced analytical instrumentation, run computer software, and perform measurements. The students will learn how to work as a team by cooperating in a group to carry out a short research project on specific applications of nanotechnology, conduct laboratory work, and prepare written reports & verbal presentations at the seminar. |