Results 211 to 220 of about 20,932 (254)

Diffusivity measurements in polymers: III. Quartz crystal microbalance techniques

SPIE Proceedings, 1997
A quartz crystal microbalance (QCM) system has been designed and constructed in order to measure the diffusion rates of several different casting solvents in a photoresist film. The QCM employs an oscillating quartz crystal that is coated with a photoresist film.
Katherine E. Mueller, William J. Koros, Yvonne Y. Wang, C. Grant Willson   +3 more
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The Quartz Crystal Microbalance as a Nanotribology Technique

2007
The quartz crystal microbalance (QCM) technique is a powerful probe of interfacial phenomena that has been successfully employed to investigate the sliding friction of objects of nanoscopic size subject to lateral speeds as large as a few m/s. After a description of the quartz acoustics, the chapter presents the more common circuits used to drive the ...
BRUSCHI L, MISTURA, GIAMPAOLO
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Protein Adsorption on Hydroxyapatite Nano-Crystals with Quartz Crystal Microbalance Technique

Key Engineering Materials, 2007
Real time adsorption behaviors of six proteins with different isoelectric points on hydroxyapatite (HAp) nanocrystal surfaces have been investigated by using HAp sensors for quartz crystal microbalance with dissipation technique (QCM-D). The dissipation (D)–frequency (f) plots clearly showed that the different types of protein adsorption behaviors; the
Tomohiko Yoshioka, Toshiyuki Ikoma, Akira Monkawa, Toru Tonegawa, Dinko Chakarov, B. Kasemo, Nobutaka Hanagata, M. Tanaka   +7 more
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Electrospun zinc oxide nanofibers for UV sensing with quartz crystal microbalance technique

International Journal of Modern Physics B, 2021
An ultraviolet (UV) sensor consisting of a zinc oxide (ZnO) nanofiber sensing membrane and a quartz crystal microbalance (QCM) was fabricated. ZnO nanofibers were prepared by electrospinning and calcination. The morphology and structure of the nanofiber sensing membrane were characterized by scanning electron microscopy and X-ray diffraction.
Xing-Sheng Ma, Hong-Di Zhang, Guo-Yi Li, Kun Guo, Yun-Ze Long   +4 more
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Improved quartz crystal microbalance technique

Journal of Applied Physics, 1984
The importance of using the most pertinent mathematical description of the mass load versus frequency relation for quartz crystal thin-film thickness monitors is reviewed. The different usable crystal load ranges of the so-called frequency- and period-measurement techniques in comparison with the Z-Match technique are calculated for most of the ...
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Quartz Crystal Microbalance Technique for in Situ Analysis of Supersaturation in Cooling Crystallization

Analytical Chemistry, 2016
A quartz crystal microbalance (QCM) is used as a novel in situ strategy for analyzing the supersaturation profile during cooling crystallization. The main concept is based on preventing any solid mass loading on the QCM sensor by modifying the sensor surface.
Li-Shang, Liu, Jong-Min, Kim, Woo-Sik, Kim   +2 more
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Following Polymer Brush Growth Using the Quartz Crystal Microbalance Technique

Macromolecular Rapid Communications, 2005
AbstractSummary: The growth of surface‐initiated poly([2‐(methacryloyloxy)ethyl]trimethylammonium chloride) (pMETAC) brushes by ATRP was monitored by the quartz crystal microbalance technique with dissipation (QCM‐D). The change in mass of the quartz crystals starting from the adsorption of a thiol initiator monolayer through to the growth of the ...
Sergio E. Moya, Andrew A. Brown, Omar Azzaroni, Wilhelm T. S. Huck   +3 more
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Combination of Quartz Crystal Microbalance with other Techniques

2008
As implied by its acronym, the quartz crystal microbalance was first used to determine the mass of material deposited on its surface. A heuristic description of the linear relation between the change in its resonant frequency Δf, from its unloaded resonant frequency f 0 , and the mass density, m’, was recognized by Sauerbrey [1] and led to the now ...
Ernesto Calvo, Kay Kanazawa, Hubert Perrot, Yolanda Jimenez   +3 more
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Glassy polymer‐sorption phenomena measured with a quartz crystal microbalance technique

Journal of Polymer Science Part B: Polymer Physics, 2003
AbstractThe quartz crystal microbalance (QCM) method is applied to the measurement of CO2 sorption in glassy poly(ethylene terephthalate) (PET), poly(methyl methacrylate), and polysulfone. Polymer thin films in the thickness range of 350–550 nm are prepared by spin‐casting onto the quartz crystal devices.
C. Zhang, B. P. Cappleman, M. Defibaugh‐Chavez, D. H. Weinkauf   +3 more
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Electrochemical Quartz Crystal Microbalance Technique to Monitor External Polymeric Pipeline Coatings

Journal of ASTM International, 2009
Electrochemical Quartz Crystal Microbalance (EQCM) can be used to monitor changes in several material properties, including mass, electrochemical, viscosity, adsorption, and deposition. In this paper, EQCM was evaluated to determine if it can monitor changes to the metal-coating interface well before any visible∕physical changes to the coating ...
Sankara Papavinasam, Michael Attard, R. Winston Revie   +2 more
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