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FTIR Spectrometer
FTIR Spectrometer

... A spectrometer is an optical instrument used to measure properties of light over a specific portion of the electromagnetic spectrum, 5 microns to 20 microns. ...
Absorption Measurements on PC1
Absorption Measurements on PC1

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A Study of YVO4 - Sweet Briar College
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... boules. The most popular method of growth is the Czochralski technique. YVO4 is effective in many applications because of its birefringence and thermal properties. Birefringence of a crystal is the splitting of a light wave into two unequally reflected or transmitted waves by a crystal. The birefrin ...
852_1.pdf
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... heterogeneous samples such as biological tissue may be investigated. Figure 2b shows that phase of the interference fringe intensity contains information about surface acoustic waves and appropriate phase demodulation processing is required to extract the acoustic waveform. We use a lock-in type syn ...
Characterization techniques for nanotechnology
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... are used to identify the elemental composition of the sample by a technique known as energy dispersive Xray (EDX). Back-scattered electrons (BSE) that come from the sample may also be used to form an image. BSE images are often used in analytical SEM along with the spectra made from the characterist ...
X-Ray Diffraction and Scanning Probe Microscopy
X-Ray Diffraction and Scanning Probe Microscopy

... Challenges for STM Theoretically, STM can be used to image individual atoms on the surface; in practice, however, three challenges arise. The first challenge, vibrations, are important because the separation between the sample and probe is so small. Since the tip is only a few angstroms from the sur ...
FYS0460 / FYSZ460 Ohjelmatyö Elektronisuhkulitografia
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Raman_Intensities
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Atomic Force Microscope (AFM)
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... • Imaging of the surface topology may then be carried out in one of two ways: – in constant height mode (in which the tunnelling current is monitored as the tip is scanned parallel to the surface) – in constant current mode (in which the tunnelling current is maintained constant as the tip is scann ...
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... obtained in a cumbersome way by moving the sample, which would require the accurate verification of the exact sample movement. This could be done in our method by the presence of an online AFM. However, as shown in the Methods section, a single nanometrically exact and known subpixel movement of the ...
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Nanoscopy with focused light
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... Throughout the 20th century it was widely accepted that a light microscope relying on conventional optical lenses cannot discern details that are much finer than about half the wavelength of light (200-400 nm), due to diffraction. However, in the 1990s, the viability to overcome the diffraction barr ...
Frequency Domain Optical Coherence Tomography (FDOCT)
Frequency Domain Optical Coherence Tomography (FDOCT)

... University of California at Irvine Irvine, CA 92612 Email: [email protected] Faculty mentor: Prof. Zhongping Chen Lab mentor: Jun Zhang ...
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Atomic Absorption Spectrometry
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... As shown in figure 1, the leaf spring, also called cantilever, is brought close to the sample. As with the STM, a signal is m easured in the immediate vicinity of the surface. The deflection of the leaf spring is measured with the laser beam deflection. To this end a laser beam is reflected from the ...
Stimulated Raman Spectroscopy  1 1.  Introduction
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... a cell that was connected to a listening tube. When the sunlight was repeatedly blocked and unblocked, sound could be heard through the listening tube at the sunlight chopping frequency. The technique saw few applications until about 1968 when a rise in its use began due to the availability of laser ...
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... in-plane (CONH plane) and three out-of-plane vibrations. The amide I band occurs at about 1650 cm−1; it is mainly caused by C = 0 stretching vibration. The amide II bond at 1540 cm−1 has C–N stretching and NH bending character. A strong band occurs at about 3300 cm−1 and a somewhat weaker one at 310 ...
Document
Document

... brings the resolution down to the 1-nm range; by applying high fields (on the order of 108 V/cm) during, for example, half an hour, resolutions considerably below 1 nm could be reached. Most experiments were done with tungsten wires either ground or etched to a radius typically in the range of 0.1– ...
Summary
Summary

... which the number of atoms in a quantum state is amplified due to bosonic stimulation. In previous amplifiers based on superradiant Rayleigh scattering the atoms remained in the same internal state [1, 2], a fact that severely limited the performance since the amplified atoms were scattered out of th ...
Raman Spectroscopy Case Study: The Dissolution of Amorphous
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pptx - Yale University
pptx - Yale University

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Enhanced transmission in near-field imaging of layered plasmonic
Enhanced transmission in near-field imaging of layered plasmonic

... in the near-field optical microscopy community. With near-field scanning optical microscopy (NSOM), convention dictates that smaller apertures provide better resolution. As aperture diameter decreases, so does the amount of light exiting the aperture. It has since been shown that surface plasmon res ...
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Vibrational analysis with scanning probe microscopy

The technique of vibrational analysis with scanning probe microscopy allows probing vibrational properties of materials at the submicrometer scale, and even of individual molecules. This is accomplished by integrating scanning probe microscopy (SPM) and vibrational spectroscopy (Raman scattering or/and Fourier transform infrared spectroscopy, FTIR). This combination allows for much higher spatial resolution than can be achieved with conventional Raman/FTIR instrumentation. The technique is also nondestructive, requires non-extensive sample preparation, and provides more contrast such as intensity contrast, polarization contrast and wavelength contrast, as well as providing specific chemical information and topography images simultaneously.
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