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Relevant bibliographies by topics / Thin films. Polystyrene. Fourier transform spectroscopy

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Academic literature on the topic 'Thin films. Polystyrene. Fourier transform spectroscopy'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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Journal articles on the topic "Thin films. Polystyrene. Fourier transform spectroscopy"

1

Xue, Meng Meng, and Guang Fen Li. "Microstructuring of Polystyrene Films by Template-Leaching Technique." Advanced Materials Research 538-541 (June 2012): 120–23. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.120.

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In this study, porous polystyrene membranes were prepared by a template-leaching technique. A suspension was first prepared by dispersing both polystyrene and starch in toluene, in which starch was used as leachable component. The weight ratio of starch/polystyrene ranged from 1:1, 1:2 to 1:3, whereas the concentration of the suspensions altered from 1%, 3%, to 5% by weight of polystyrene/toluene. After spin-coating the prepared suspension on the glass substrate, polystyrene/starch thin-film was produced, and then was treated with inorganic acid to remove starch components. The porous films with ordered and homogeneous structures were resulted. Analysis by contact angle measurement, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy analysis (FTIR) show that the microstructures on the porous films were affected by many experimental factors during the formation of thin-film and the following leaching process. Especially the type of the inorganic acid such as HCl, H2SO4, or HNO3, and the concentration of the specific acid selected in the leaching process have dramatic influences on the formation of the porous polystyrene membrane. The results further demonstrated that starch particles can be maximally removed when the films were immersed into the aqueous solution of HNO3.

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Markwell, Ross D., Ian S. Butler, Jian Ping Gao, and Alan Shaver. "Near-infrared fourier transform Raman spectroscopic characterization of transition metal carbonyl complexes embedded in thin films of polystyrene, poly(methyl methacrylate) and polystyrene-polyacrylonitrile." Journal of Raman Spectroscopy 24, no. 7 (1993): 423–30. http://dx.doi.org/10.1002/jrs.1250240707.

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Golla, Manohar, Baku Nagendra, Christophe Daniel, Paola Rizzo, and Gaetano Guerra. "Axial Orientation of Co-Crystalline Phases of Poly(2,6-Dimethyl-1,4-Phenylene)Oxide Films." Polymers 12, no. 10 (2020): 2394. http://dx.doi.org/10.3390/polym12102394.

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Films exhibiting co-crystalline (CC) phases between a polymer host and low-molecular-mass guest molecules are relevant for many applications. As is usual for semi-crystalline polymers, axially oriented films can give relevant information on the crystalline structure, both by Wide Angle X-ray diffraction fiber patterns and by polarized Fourier-transform infrared spectroscopy. Axially oriented CC phases of poly(2,6-dimethyl-1,4-phenylene)oxide (PPO) with 1,3,5-trimethylbenzene (mesitylene) can be simply obtained by the stretching of CC PPO films. In fact, due to the plasticization effect of this highly boiling guest, PPO orientation can occur in a stretching temperature range (170–175 °C) nearly 50 °C lower than that generally needed for PPO films (220–230 °C). This low stretching temperature range allows avoidance of polymer oxidation, as well as formation of the mesomorphic dense γ PPO phase. Axially oriented CC phases of PPO with toluene, i.e., with a more volatile guest, can be instead obtained by the stretching (in the same low temperature range: 170–175 °C) of CC PPO blend films with polystyrene.

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Bani-Salameh, Areen A., A. A. Ahmad, A. M. Alsaad, I. A. Qattan, and Ihsan A. Aljarrah. "Synthesis, Optical, Chemical and Thermal Characterizations of PMMA-PS/CeO2 Nanoparticles Thin Film." Polymers 13, no. 7 (2021): 1158. http://dx.doi.org/10.3390/polym13071158.

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We report the synthesis of hybrid thin films based on polymethyl methacrylate) (PMMA) and polystyrene (PS) doped with 1%, 3%, 5%, and 7% of cerium dioxide nanoparticles (CeO2 NPs). The As-prepared thin films of (PMMA-PS) incorporated with CeO2 NPs are deposited on a glass substrate. The transmittance T% (λ) and reflectance R% (λ) of PMMA-PS/CeO2 NPs thin films are measured at room temperature in the spectral range (250–700) nm. High transmittance of 87% is observed in the low-energy regions. However, transmittance decreases sharply to a vanishing value in the high-energy region. In addition, as the CeO2 NPs concentration is increased, a red shift of the absorption edge is clearly observed suggesting a considerable decrease in the band gap energy of PMMA-PS/CeO2 NPs thin film. The optical constants (n and k) and related key optical and optoelectronic parameters of PMMA-PS/Ce NPs thin films are reported and interpreted. Furthermore, Tauc and Urbach models are employed to elucidate optical behavior and calculate the band gaps of the as-synthesized nanocomposite thin films. The optical band gap energy of PMMA-PS thin film is found to be 4.03 eV. Optical band gap engineering is found to be possible upon introducing CeO2 NPs into PMMA-PS polymeric thin films as demonstrated clearly by the continuous decrease of optical band gap upon increasing CeO2 content. Fourier-transform infrared spectroscopy (FTIR) analysis is conducted to identify the major vibrational modes of the nanocomposite. The peak at 541.42 cm−1 is assigned to Ce–O and indicates the incorporation of CeO2 NPs into the copolymers matrices. There were drastic changes to the width and intensity of the vibrational bands of PMMA-PS upon addition of CeO2 NPs. To examine the chemical and thermal stability, thermogravimetric (TGA) thermograms are measured. We found that (PMMA-PVA)/CeO2 NPs nanocomposite thin films are thermally stable below 110 °C. Therefore, they could be key candidate materials for a wide range of scaled multifunctional smart optical and optoelectronic devices.

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Kausar, Ayesha, Sanaa Meer, and Tahir Iqbal. "Structure, morphology, thermal, and electro-magnetic shielding properties of polystyrene microsphere/polyaniline/multi-walled carbon nanotube nanocomposite." Journal of Plastic Film & Sheeting 33, no. 3 (2016): 262–89. http://dx.doi.org/10.1177/8756087916663813.

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In this work, polystyrene microspheres (PSMS) and PSMS-based polymer nanocomposites have been prepared. PSMS were first synthesized by dispersion polymerization of styrene monomer. The microsphere- coated-multi-walled carbon nanotube (PSMS/MWCNT) nanocomposite was prepared by incorporating MWCNT into PSMS matrix. Aniline monomer was then introduced by means of in situ oxidative polymerization (PANI) route to PSMS, MWCNT, and PSMS/MWCNT. Fourier transform infrared spectroscopy depicted the composite formation of PANI and MWCNT with PSMS matrix. PANI polymer was successfully polymerized in PSMS matrix and on carbon nanotube walls. According to scanning electron microscopy, all nanocomposites exhibited core-shell morphology. Glass transition temperature (Tg) of PSMS/PANI, PANI/MWCNT, and PSMS/PANI/MWCNT were found as 245℃, 287℃, and 289℃, while maximum decomposition temperature (Tmax) was 387℃, 575℃, and 580℃, respectively. Tetrahydrofuran was shown to be a suitable solvent for dispersing the nanocomposite. Toluene can also be used as suitable solvent for these nanocomposites. X-ray diffraction analysis depicted amorphous form of PSMS; however, PANI and MWCNT reduced the amorphous nature of the microspheres. PANI/MWCNT showed the highest crystallinity among all nanocomposites. Moreover, PSMS/PANI/MWCNT nanocomposite revealed electromagnetic interference shielding effectiveness of ∼23.2 dB.

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Zimba, C. G., V. M. Hallmark, J. F. Rabolt, and J. D. Swalen. "Fourier transform Raman spectroscopy of thin films." Thin Solid Films 160, no. 1-2 (1988): 311–16. http://dx.doi.org/10.1016/0040-6090(88)90075-2.

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Webb, J. D., B. M. Keyes, R. K. Ahrenkiel, et al. "Fourier transform-luminescence spectroscopy of semiconductor thin films and devices." Vibrational Spectroscopy 21, no. 1-2 (1999): 3–15. http://dx.doi.org/10.1016/s0924-2031(99)00051-x.

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Graf, R. T., F. Eng, J. L. Koenig, and H. Ishida. "Polarization Modulation Fourier Transform Infrared Ellipsometry of Thin Polymer Films." Applied Spectroscopy 40, no. 4 (1986): 498–503. http://dx.doi.org/10.1366/0003702864508818.

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Polarization modulation infrared ellipsometric spectra were collected on an FT-IR spectrometer, with the use of two linear polarizers and a photoelastic modulator. Samples consisted of thin poly(vinyl acetate) and poly(methyl methacrylate) films on gold substrates. The relative phase retardation (delta) and relative amplitude (psi) were derived from these measurements. These spectra were superior to those from static infrared ellipsometry measurements on the same samples. The thickness and optical constants of the films were calculated from the ellipsometric measurements and compared with reference optical constant spectra.

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Al-Kadhemy, Mahasin F. Hadi, Zahraa S. Rasheed, and Sanaa R. Salim. "Fourier transform infrared spectroscopy for irradiation coumarin doped polystyrene polymer films by alpha ray." Journal of Radiation Research and Applied Sciences 9, no. 3 (2016): 321–31. http://dx.doi.org/10.1016/j.jrras.2016.02.004.

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Zimba, C. G., S. Turrell, J. D. Swalen, V. M. Hallmark, and J. F. Rabolt. "Applications of Fourier transform Raman spectroscopy to studies of thin polymer films." Journal of Physical Chemistry 94, no. 2 (1990): 939–43. http://dx.doi.org/10.1021/j100365a080.

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Dissertations / Theses on the topic "Thin films. Polystyrene. Fourier transform spectroscopy"

1

Wong, Kin Chiu. "Study of mechanically aligned polystyrene thin films by FTIR /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?PHYS%202006%20WONG.

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Khoele, Joshua Relebogile. "Deposition and structural properties of silicon carbide thin films for solar cell applications." University of the Western Cape, 2014. http://hdl.handle.net/11394/4345.

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>Magister Scientiae - MSc<br>The growth of hydrogenated amorphous silicon carbide (a-SiC:H) thin films deposited by Hot- Wire Chemical Vapour Deposition (HWCVD) for solar cell applications has been studied. The films were characterized for structural properties using Fourier Transform Infrared Spectroscopy FTIR, Elastic Recoil Detection Analysis (ERDA), X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM) and Raman Spectroscopy (RS). A low temperature of the substrate heater maintained at 280 °C was used in this thesis due to the demand of low-cost solar cells based on cheap substrate that require deposition at such low temperatures. In this thesis, we showed that the structural properties of a-SiC:H films are dependent on the filament temperature and also on the CH4 gas flow rate. It was shown that in non-stoichiometric a-SiC:H, hydrogen content throughout the deposited films varies with depth. An attempt is done in this study to determine, for the first time the absorption strength of the C-Hn bonds in the 950 -1050 cm-1 band of the FTIR spectrum. Real-time ERDA was used to determine the hydrogen kinetics parameters in a single temperature ramp; a model based on the solution of the diffusion equation is used for this effect.

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Khuu, Vinh. "Spectral radiative properties of thin films with rough surfaces using Fourier-transform infrared spectrometry." Thesis, Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-04122004-120249/unrestricted/khuu%5Fvinh%5Fp%5F200405%5Fmast.pdf.

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Thesis (M.S.)--Mechanical Engineering, Georgia Institute of Technology, 2004.<br>Fedorov, Andrei, Committee Member ; Mahan, J. Robert, Committee Member ; Zhang, Zhuomin, Committee Chair. Includes bibliographical references (leaves 80-82).

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Shahedipour, Fatemeh. "Diamond synthesis on steel substrates using magneto-active plasma chemical vapor deposition with novel in situ FTIR spectroscopy characterization /." free to MU campus, to others for purchase, 1998. http://wwwlib.umi.com/cr/mo/fullcit?p9901278.

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Mukherjee, Tamal. "Investigation of Post-Plasma Etch Fluorocarbon Residue Characterization, Removal and Plasma-Induced Low-K Damage for Advanced Interconnect Applications." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc849649/.

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Modern three-dimensional integrated circuit design is rapidly evolving to more complex architecture. With continuous downscaling of devices, there is a pressing need for metrology tool development for rapid but efficient process and material characterization. In this dissertation work, application of a novel multiple internal reflection infrared spectroscopy metrology is discussed in various semiconductor fabrication process development. Firstly, chemical bonding structure of thin fluorocarbon polymer film deposited on patterned nanostructures was elucidated. Different functional groups were identified by specific derivatization reactions and model bonding configuration was proposed for the first time. In a continued effort, wet removal of these fluorocarbon polymer was investigated in presence of UV light. Mechanistic hypothesis for UV-assisted enhanced polymer cleaning efficiency was put forward supported by detailed theoretical consideration and experimental evidence. In another endeavor, plasma-induced damage to porous low-dielectric constant interlayer dielectric material was studied. Both qualitative and quantitative analyses of dielectric degradation in terms of increased silanol content and carbon depletion provided directions towards less aggressive plasma etch and strip process development. Infrared spectroscopy metrology was also utilized in surface functionalization evaluation of very thin organic films deposited by wet and dry chemistries. Palladium binding by surface amine groups was examined in plasma-polymerized amorphous hydrocarbon films and in self-assembled aminosilane thin films. Comparison of amine concentration under different deposition conditions guided effective process optimization. A time- and cost-effective method such as current FTIR metrology that provides in-depth chemical information about thin films, surfaces, interfaces and bulk layers can be increasingly valuable as critical dimensions continue to scale down and subtle process variances begin to have a significant impact on device performance.

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Abrahams, Dhielnawaaz. "Charge Transfer and Capacitive Properties of Polyaniline/ Polyamide Thin Films." University of the Western Cape, 2018. http://hdl.handle.net/11394/6361.

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Magister Scientiae - MSc (Chemistry)<br>Blending polymers together offers researchers the ability to create novel materials that have a combination of desired properties of the individual polymers for a variety of functions as well as improving specific properties. The behaviour of the resulting blended polymer or blend is determined by the interactions between the two polymers. The resultant synergy from blending an intrinsically conducting polymer like polyaniline (PANI), is that it possesses the electrical, electronic, magnetic and optical properties of a metal while retaining the poor mechanical properties, solubility and processibility commonly associated with a conventional polymer. Aromatic polyamic acid has outstanding thermal, mechanical, electrical, and solvent resistance properties that can overcome the poor mechanical properties and instability of the conventional conducting polymers, such as polyaniline.

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Murphy, Michael Roland. "Characterization of thin biological films by Raman and fourier transform infrared spectroscopy." 2004. http://purl.galileo.usg.edu/uga%5Fetd/murphy%5Fmichael%5Fr%5F200405%5Fphd.

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Xie, Yidan. "The measurements of the optical properties of diamond-like carbon thin films by fourier-transform infrared spectroscopy." Thesis, 1994. http://hdl.handle.net/2429/5602.

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Infrared reflectance and transmittance measurements of diamond-like carbon thin films grown by d.c. magnetron sputtering were performed at nearly normal incidence, using a Bruker IFS 1 13V Fourier-transform spectrometer. The project was a collaboration with Glenn Clarke, a Ph.D student under the supervision of Dr. R. Parsons. Glenn Clarke grew all of the films and extracted the absorption coefficient from the reflectivity and transmission data, using a matrix method. The spectral features were mainly the broad interference oscillations characteristic of thin films and the absorptions caused by excited vibrational modes. An interband-transition model of n and k, together with a dispersion model, which is a superposition of the background absorption and the vibrational resonances, was used to fit the experimental data and obtain some information about the chemical bonds in these films. It was found that the optical properties of the diamond-like carbon films were strongly dependent on the deposition pressure during the sputtering and any hydrogen incorporation.

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Books on the topic "Thin films. Polystyrene. Fourier transform spectroscopy"

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Feng, Chen Jing, and United States. National Aeronautics and Space Administration., eds. Optical and electrical properties of thin superconducting films. Sam Houston State University, Dept. of Physics, 1990.

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2

Devinder, Gupta, and National Institute of Standards and Technology (U.S.), eds. Polystyrene films for calibrating the wavelength scale of infrared spectrophotometers - SRM 1921. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1995.

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Book chapters on the topic "Thin films. Polystyrene. Fourier transform spectroscopy"

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Petzelt, Jan, Vladimir Železný, Stanislav Kamba, Ilja Fedorov, and Filip Kadlec. "Quantitative Infrared and Sub-millimetre Spectroscopy of Dielectric Single Crystals, Ceramics and Thin Films." In Progress in Fourier Transform Spectroscopy. Springer Vienna, 1997. http://dx.doi.org/10.1007/978-3-7091-6840-0_67.

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2

Zhizhin, Guerman N., Andrei A. Sigarev, and Vladimir A. Yakovlev. "FT Infrared SEW Spectroscopy of Thin Films on Metal Surfaces by Using a Single Coupling Element or Composite SEW Waveguides." In Progress in Fourier Transform Spectroscopy. Springer Vienna, 1997. http://dx.doi.org/10.1007/978-3-7091-6840-0_172.

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Swalen, J. D., and J. F. Rabolt. "CHARACTERIZATION OF ORIENTATION AND LATERAL ORDER IN THIN FILMS BY FOURIER TRANSFORM INFRARED SPECTROSCOPY." In Fourier Transform Infrared Spectra. Elsevier, 1985. http://dx.doi.org/10.1016/b978-0-12-254104-9.50013-4.

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Conference papers on the topic "Thin films. Polystyrene. Fourier transform spectroscopy"

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Alieva, E. V., G. Mattei, Yuriy Y. Petrov, et al. "Infrared optical constants of fullerene and phtalocyanin thin films." In Fourier Transform Spectroscopy: Ninth International Conference, edited by John E. Bertie and Hal Wieser. SPIE, 1994. http://dx.doi.org/10.1117/12.166634.

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Graf, R. T., J. L. Koenig, and H. Ishida. "Fourier Transform Infrared Ellipsometry Of Thin Polymer Films." In 1985 International Conference on Fourier and Computerized Infrared Spectroscopy, edited by David G. Cameron and Jeannette G. Grasselli. SPIE, 1985. http://dx.doi.org/10.1117/12.970736.

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Kristof, Janos, J. Mink, Erzsebet Horvath, and Csaba Nemeth. "Emission FTIR studies on the formation of ruthenium-based electrocatalytic thin films." In Fourier Transform Spectroscopy: Ninth International Conference, edited by John E. Bertie and Hal Wieser. SPIE, 1994. http://dx.doi.org/10.1117/12.166637.

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Hilbrich, S., W. Theiß, and R. A. Carpio. "Wait and watch—monitoring photoresist thin films during heat treatment." In The eleventh international conference on fourier transform spectroscopy. AIP, 1998. http://dx.doi.org/10.1063/1.55842.

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Terpugov, Eugeni L., and Olga V. Degtyareva. "Investigation of thin films using Fourier-transform infrared emission spectroscopy." In International Symposium on Optical Science and Technology, edited by Cam Nguyen. SPIE, 2000. http://dx.doi.org/10.1117/12.390672.

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Zhizhin, G. N., M. A. Moskalova, V. A. Sychugov, and V. A. Yakovlev. "Surface Electromagnetic Wave Fourier-Transform Infrared (FTIR) sPectroscopy Of Very Thin Films." In 1985 International Conference on Fourier and Computerized Infrared Spectroscopy, edited by David G. Cameron and Jeannette G. Grasselli. SPIE, 1985. http://dx.doi.org/10.1117/12.970913.

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Malone, C. G., E. G. Cravalho, T. J. Johnson, and R. S. Jackson. "A technique for measuring the far-infrared radiative properties of metal and superconducting thin films." In The eleventh international conference on fourier transform spectroscopy. AIP, 1998. http://dx.doi.org/10.1063/1.55740.

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Ishino, Yuichi, Robert T. Graf, and Hatsuo Ishida. "Fourier Transform Infrared Surface Electromagnetic Wave Spectroscopy of polymer thin films on metal substrate." In 1985 International Conference on Fourier and Computerized Infrared Spectroscopy, edited by David G. Cameron and Jeannette G. Grasselli. SPIE, 1985. http://dx.doi.org/10.1117/12.970925.

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Chao, Liu, Anjali Sharma, and Mohammed N. Afsar. "Precise Fourier transform spectroscopy based measurement of dielectric properties of thin films at terahertz frequency range." In 2012 IEEE International Instrumentation and Measurement Technology Conference (I2MTC). IEEE, 2012. http://dx.doi.org/10.1109/i2mtc.2012.6229584.

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Abdulhafez, Moataz, Se Youn Cho, Golnaz Tomaraei, and Mostafa Bedewy. "Microwave-Assisted Processing of Regenerated Silk Fibroin Films." In ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2932.

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Abstract Regenerated silk fibroin (RSF) is an emerging material derived from natural silk. Thin RSF films are transparent, biocompatible and biodegradable, which makes them suitable for many applications, such as flexible/conformal and transient electronics, bioresorbable devices, bioresists for lithography, and edible food protective coatings. To realize these applications, controlling and tuning the properties of RSF films is required to fully exploit their unique mechanical, optical, and degradation properties. Here, a new approach for tuning these properties is presented based on inducing rapid molecular structure transformations in fibroins via microwave heating. Transparent RSF films were post-treated by microwave irradiation, resulting in the transition of amorphous silk fibroin structure to a more α-helix dominant secondary structure. By increasing the microwave irradiation duration, an increase of helix secondary structure was observed. We use amide-I band Fourier-transform infrared spectroscopy (FTIR) of the films to characterize the secondary structure of fibroins. Moreover, we show that silicon substrates coated with 100 nm thick RSF films by spin casting, exhibit higher stability in water after microwave irradiation for up to 10 minutes, confirming a conformational change in the RSF secondary structure towards more stable α-helical rich motifs. Our results show that microwave treatment can be a new high throughput approach for tailoring the properties and structure of functional RSF-based films in a scalable and sustainable manufacturing process, when compared to other post processing techniques.

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