Differential pressure experiment to probe hole growth in freely standing polymer films

2003 ◽  
Vol 74 (5) ◽  
pp. 2796-2804 ◽  
Author(s):  
C. B. Roth ◽  
B. G. Nickel ◽  
J. R. Dutcher ◽  
K. Dalnoki-Veress
Keyword(s):  
Polymer Films ◽  
Differential Pressure ◽  
Pressure Experiment ◽  
Hole Growth ◽  
Probe Hole

Transition of Linear to Exponential Hole Growth Modes in Thin Free-Standing Polymer Films

2004 ◽  
Vol 37 (4) ◽  
pp. 1470-1475 ◽  
Author(s):  
J. H. Xavier ◽  
Y. Pu ◽  
C. Li ◽  
M. H. Rafailovich ◽  
J. Sokolov
Keyword(s):  
Polymer Films ◽  
Free Standing ◽  
Growth Modes ◽  
Hole Growth

Gum arabic helps prepare better lacey polymer films for specimen support in electron microscopy

1993 ◽  
Vol 51 ◽  
pp. 240-241
Author(s):  
Shailesh R. Sheth ◽  
Jayesh R. Bellare
Keyword(s):  
Electron Microscopy ◽  
Polymer Films ◽  
Gum Arabic ◽  
Complete Removal ◽  
Ammonium Bromide ◽  
Release Agent ◽  
Astigmatism Correction ◽  
Long Time ◽  
Micro Holes ◽  
Cetyl Trimethyl Ammonium

Specimen support and astigmatism correction in Electron Microscopy are at least two areas in which lacey polymer films find extensive applications. Although their preparation has been studied for a very long time, present techniques still suffer from incomplete release of the film from its substrate and presence of a large number of pseudo holes in the film. Our method ensures complete removal of the entire lacey film from the substrate and fewer pseudo holes by pre-treating the substrate with Gum Arabic, which acts as a film release agent.The method is based on the classical condensation technique for preparing lacey films which is essentially deposition of minute water or ice droplets on the substrate and laying the polymer film over it, so that micro holes are formed corresponding to the droplets. A microscope glass slide (the substrate) is immersed in 2.0% (w/v) aq. CTAB (cetyl trimethyl ammonium bromide)-0.22% (w/v) aq.

Is the chain dynamics in thin polymer films isotropic ?

2000 ◽  
Vol 10 (PR7) ◽  
pp. Pr7-233-Pr7-237 ◽  
Author(s):  
S. Rivillon ◽  
P. Auroy ◽  
B. Deloche
Keyword(s):  
Polymer Films ◽  
Thin Polymer Films ◽  
Chain Dynamics ◽  
Thin Polymer

A COMPUTER CONTROLLED SCANNING PROBE-HOLE FIELD EMISSION MICROSCOPE

1988 ◽  
Vol 49 (C6) ◽  
pp. C6-43-C6-48 ◽  
Author(s):  
R. M. WOLF ◽  
J. W. BAKKER ◽  
B. E. NIEUWENHUYS
Keyword(s):  
Field Emission ◽  
Scanning Probe ◽  
Computer Controlled ◽  
Probe Hole

Influence of magnetic field to the allocation of imputiry molecules in the structure of optically transparent polymer films

2016 ◽  
Vol 38 (3) ◽  
pp. 205-210
Author(s):  
L.A. Bulavin ◽  
◽  
Yu.F. Zabashta ◽  
О.О. Brovko ◽  
L.Yu. Vergun ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Polymer Films ◽  
Optically Transparent

Scanning-tunneling spectroscopy on conjugated polymer films

2003 ◽  
Vol 771 ◽  
Author(s):  
M. Kemerink ◽  
S.F. Alvarado ◽  
P.M. Koenraad ◽  
R.A.J. Janssen ◽  
H.W.M. Salemink ◽  
...  
Keyword(s):  
Polymer Films ◽  
Conjugated Polymer ◽  
Three Dimensional ◽  
Field Enhancement ◽  
Direct Consequence ◽  
Scanning Tunneling Spectroscopy ◽  
Tunneling Spectroscopy ◽  
Band Alignment ◽  
Scanning Tunneling ◽  
Order Of Magnitude

AbstractScanning-tunneling spectroscopy experiments have been performed on conjugated polymer films and have been compared to a three-dimensional numerical model for charge injection and transport. It is found that field enhancement near the tip apex leads to significant changes in the injected current, which can amount to more than an order of magnitude, and can even change the polarity of the dominant charge carrier. As a direct consequence, the single-particle band gap and band alignment of the organic material can be directly obtained from tip height-voltage (z-V) curves, provided that the tip has a sufficiently sharp apex.

Sign in / Sign up

Export Citation Format

Share Document