Examination of Biodegradable Polymer Thin Films

2017 ◽  
Vol 885 ◽  
pp. 123-128
Author(s):  
Mariann Kollár ◽  
Gabriella Zsoldos ◽  
Tamás Szabó ◽  
Kornél Szóda
Keyword(s):  
Thin Films ◽  
Infrared Spectroscopy ◽  
Biodegradable Polymer ◽  
Immersion Time ◽  
Guar Gum ◽  
Water Immersion ◽  
Distilled Water ◽  
Ftir Analysis ◽  
Starting Solution ◽  
Fourier Transformed Infrared Spectroscopy

Fourier Transformed Infrared Spectroscopy (FTIR) was used to study the effect of water immersion of guar gum, gelatin and pektin films. Animal-derived gelatin, citrus-derived pektin and natural guar gum made from guar seeds was used to manufacture thin films (using a 2% concentration starting solution) by casting. The biodegradable polymer films were immersed in distilled water before FTIR analysis to absorb water. The immersion time varied between 1 to 15 sec for not to make hydrocolloids, only observe swelling. After 20 sec the biofilms effectively dissolved in the distilled water.

The consequence of immersion time in chemical bath deposition on the properties of CuO thin films

2018 ◽  
Vol 35 (10) ◽  
pp. 891-898
Author(s):  
V. Ramya ◽  
K. Neyvasagam ◽  
R. Chandramohan ◽  
R. Mohan ◽  
S. Valanarasu ◽  
...  
Keyword(s):  
Thin Films ◽  
Chemical Bath Deposition ◽  
Immersion Time

scholarly journals Effects of the thickness on resistive switching characteristics of CrOx thin films

2016 ◽  
Vol 19 (2) ◽  
pp. 92-100
Author(s):  
Ngoc Kim Pham ◽  
Thang Bach Phan ◽  
Vinh Cao Tran
Keyword(s):  
Thin Films ◽  
Surface Morphology ◽  
Resistive Switching ◽  
High Reliability ◽  
Switching Behavior ◽  
Ftir Analysis ◽  
Resistive Switching Behavior ◽  
Bipolar Resistive Switching ◽  
Structure Surface ◽  
Switching Characteristics

In this study, we have investigated influences of the thickness on the structure, surface morphology and resistive switching characteristics of CrOx thin films prepared by using DC reactive sputtering technique. The Raman and FTIR analysis revealed that multiphases including Cr2O3, CrO2, Cr8O21... phases coexist in the microstructure of CrOx film. It is noticed that the amount of stoichiometric Cr2O3 phase increased significantly as well as the surface morphology were more visible with less voids and more densed particles with larger thickness films. The Ag/CrOx/FTO devices exhibited bipolar resistive switching behavior and high reliability. The resistive switching ratio has decreased slightly with the thickness increments and was best achieved at CrOx – 100 nm devices.

Mercury Detection with Ag Nanoparticles Reduced on Si Thin Films

2007 ◽  
Vol 1010 ◽  
Author(s):  
A. Kaan Kalkan
Keyword(s):  
Thin Films ◽  
Silver Nanoparticles ◽  
Immersion Time ◽  
Reduction Process ◽  
Blue Shift ◽  
Plasmon Mode ◽  
Au Nanoparticle ◽  
Plasmon Band ◽  
Mercury Detection ◽  
Silicon Thin Films

AbstractA surface plasmon resonance mercury sensor was demonstrated by electroless reduction of silver nanoparticles on amorphous silicon thin films. Unlike the previous Ag/Au nanoparticle - Hg interaction investigations, which monitored the blue shift of the dipolar plasmon band of well-dispersed nanoparticles, the present work reveals and explores the red shift of the symmetric hybrid plasmon mode of the interacting nanoparticles in response to Hg vapor exposure. Sensitivity to Hg was explored with varying nanoparticle size, which could be controlled by the immersion time associated with the reduction process. The recovery of the hybrid plasmon band after the Hg exposure was also monitored which was observed to be slower than the recovery of the dipolar plasmon band for noninteracting particles.

Explosive Thermal Decomposition Mechanism of NTO

1995 ◽  
Vol 418 ◽  
Author(s):  
David J. Beardall ◽  
Tod R. Botcher ◽  
Charles A. Wight
Keyword(s):  
Thin Films ◽  
Thermal Decomposition ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Condensed Phase ◽  
Decomposition Product ◽  
Rapid Heating ◽  
Initial Step ◽  
Thermal Decomposition Mechanism ◽  
Decomposition Products

AbstractThe initial step of the thermal decomposition of NTO (5-nitro-2,4-dihydro-3H-1,2,4- triazol-3-one) is determined by pulsed infrared laser pyrolysis of thin films. Rapid heating of the film and quenching to 77 K allows one to trap the initial decomposition products in the condensed phase and analyze them using transmission Fourier-transform infrared spectroscopy. The initial decomposition product is CO2; NO2 and HONO are not observed. We propose a new mechanism for NTO decomposition in which CO2 is formed.

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