Damaging of a Soft Polymeric Substrate by Crack Propagation Through Its Hard Coating

2002 ◽  
Vol 734 ◽  
Author(s):  
M. George ◽  
J. Colin ◽  
C. Coupeau ◽  
J.W. Grilhé
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Crack Propagation ◽  
Post Mortem ◽  
Polymeric Substrate ◽  
Force Microscopy ◽  
Nickel Thin Films ◽  
Atomic Force ◽  
Film Substrate ◽  
Metallic Thin Film

Atomic force microscopy observations of the fine structure of cracks have been carried out on Nickel thin films on polyimide substrates under tensile test. For strains of the order of 10%, the cracking of the metallic thin film induces notable damaging of the polymeric substrate. Post-mortem observations of the substrate and finite element simulations of the stress field at the cracks head have been performed to characterize this unexpected damaging: the crack propagation at the film/substrate interface and inside the substrate.

Local piezoelectric and ferroelectric responses in nanotube-patterned thin films of BaTiO3 synthesized hydrothermally at 200 °C

2006 ◽  
Vol 21 (3) ◽  
pp. 547-551 ◽  
Author(s):  
Rosalía Poyato ◽  
Bryan D. Huey ◽  
Nitin P. Padture
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Atomic Force Microscopy ◽  
Direct Current ◽  
Piezoelectric Properties ◽  
Force Microscopy ◽  
Atomic Force ◽  
Phase Images ◽  
Fabrication Procedure ◽  
Film Substrate

Piezoresponse atomic-force microscopy (PFM) has been used to characterize the local piezoelectric properties of a novel, nanotube-patterned (“honeycomb”) thin film of BaTiO3 on Ti substrate synthesized hydrothermally at 200 °C. PFM amplitude and phase images, prior to the application of any direct current (dc) field, show ring-shaped piezoelectric regions that correspond to the nanostructure of this film. These results show clearly that the as-synthesized nanotube-patterned BaTiO3 thin film is piezoelectric, with a net spontaneous polarization perpendicular to the film–substrate interface. In addition, polarization switching and hysteresis were observed as a function of applied dc field, confirming that this novel fabrication procedure results in unique configurations of BaTiO3 film that are also ferroelectric.

Atomic force microscopy of in situ deformed nickel thin films

1999 ◽  
Vol 353 (1-2) ◽  
pp. 194-200 ◽  
Author(s):  
C. Coupeau ◽  
J.F. Naud ◽  
F. Cleymand ◽  
P. Goudeau ◽  
J. Grilhé
Keyword(s):  
Thin Films ◽  
Atomic Force Microscopy ◽  
Force Microscopy ◽  
Nickel Thin Films ◽  
Atomic Force

scholarly journals Tip-Based Nanomachining on Thin Films: A Mini Review

2021 ◽  
Author(s):  
Shunyu Chang ◽  
Yanquan Geng ◽  
Yongda Yan
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Data Storage ◽  
Three Dimensional ◽  
Maintenance Cost ◽  
Two Dimensional ◽  
Force Microscopy ◽  
Atomic Force ◽  
Current State ◽  
Two Dimensional Materials

AbstractAs one of the most widely used nanofabrication methods, the atomic force microscopy (AFM) tip-based nanomachining technique offers important advantages, including nanoscale manipulation accuracy, low maintenance cost, and flexible experimental operation. This technique has been applied to one-, two-, and even three-dimensional nanomachining patterns on thin films made of polymers, metals, and two-dimensional materials. These structures are widely used in the fields of nanooptics, nanoelectronics, data storage, super lubrication, and so forth. Moreover, they are believed to have a wide application in other fields, and their possible industrialization may be realized in the future. In this work, the current state of the research into the use of the AFM tip-based nanomachining method in thin-film machining is presented. First, the state of the structures machined on thin films is reviewed according to the type of thin-film materials (i.e., polymers, metals, and two-dimensional materials). Second, the related applications of tip-based nanomachining to film machining are presented. Finally, the current situation of this area and its potential development direction are discussed. This review is expected to enrich the understanding of the research status of the use of the tip-based nanomachining method in thin-film machining and ultimately broaden its application.

EFFECT OF N CONTENT ON THE THERMAL STABILITY OF Ta–Si–N THIN FILM BARRIER LAYER

2010 ◽  
Vol 24 (30) ◽  
pp. 5867-5875
Author(s):  
JICHENG ZHOU ◽  
ZHENG LIU ◽  
XUQIANG ZHENG ◽  
YOUZHEN LI ◽  
DITIAN LUO
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Sheet Resistance ◽  
Diffusion Barrier ◽  
Diffraction Method ◽  
N Content ◽  
Force Microscopy ◽  
Atomic Force ◽  
Nano Crystalline ◽  
P Type

Ta–Si–N thin films and Cu/Ta–Si–N thin films were deposited on p-type Si (111) substrates by magnetron reactive sputtering. Then the films were characterized by four-point probe sheet resistance measurement, atomic force microscopy, X-ray diffraction method and scanning electron microscope, respectively. The experimental results show that the sheet resistance of Ta–Si–N thin film increases with N content. And the surface roughness of the thin film first decreases and then increases with N content. By increasing the N content, the diffusion barrier property of Ta–Si–N thin film can be improved; however, this improvement is not evident when N content beyond 56%. The as-deposited Ta–Si thin film is nano-crystalline. When doped with N, the as-deposited thin film becomes amorphous. The crystallization of Ta–Si–N thin film occurs again at high temperature. Cu atoms diffuse through grain boundaries of Ta–Si–N thin film into Si , and this leads to failure of the diffusion barrier.

Fractal Analysis of Morphological Image of Organic Phthalocyanine Tetrasulfonic Acid Tetrasodium (TsNiPc) Film

2014 ◽  
Vol 895 ◽  
pp. 407-410
Author(s):  
Yeo Lee Kong ◽  
S.V. Muniandy ◽  
M.S. Fakir ◽  
K. Sulaiman
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Fractal Dimension ◽  
Organic Thin Films ◽  
Force Microscopy ◽  
Atomic Force ◽  
Power Spectral ◽  
Spectral Density Method ◽  
Surface Morphologies ◽  
Conductivity Of Thin Films

Surface morphology of thin films can be efficiently characterized using power spectral density method. Spectral based parameters from surface models can then be linked to electrical conductivity of thin films used for fabricating organic photovoltaic devices. In this study, the surface morphologies of the organic thin films phthalocyanine tetrasulfonic acid tetrasodium (TsNiPc) are investigated using atomic force microscopy. The thin film samples are imaged at 40-minutes and 120-minutes after the solvent treatment. The spectral exponent β is determined from the slope of PSD log-log plot and the fractal dimension D of each film is calculated based on fractal relation β = 8 2D. The relationship between surface roughness and fractal dimension with respect to electrical properties of thin film is discussed.

Effect of TiO2 Nanofiller on Nanocomposited PMMA/TiO2 Thin Film

2012 ◽  
Vol 576 ◽  
pp. 417-420 ◽  
Author(s):  
N.N. Hafizah ◽  
Ismail Lyly Nyl ◽  
M.Z. Musa ◽  
Mohamad Rusop Mahmood
Keyword(s):  
Thin Film ◽  
Electron Microscopy ◽  
Thin Films ◽  
Scanning Electron Microscopy ◽  
Spin Coating ◽  
Weight Percentage ◽  
Force Microscopy ◽  
Atomic Force ◽  
Nanocomposite Thin Films ◽  
Scanning Electron

In this study, PMMA/TiO2 nanocomposite thin films were prepared by using sonication spin coating technique. The PMMA and TiO2 solution were mixed together and sonicated for 1h to confirm the homogeneity of the sample. The thin films obtained were then measured using atomic force microscopy (AFM), field emission scanning electron microscopy (FESEM) and Fourier transform infrared (FTIR). FESEM micrograph reveals that the uniformity increases with the increase of TiO2 weight percentage.

scholarly journals Au Nanoparticles as Template for Defect Formation in Memristive SrTiO3 Thin Films

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 869 ◽  
Author(s):  
Nicolas Raab ◽  
Dirk Schmidt ◽  
Hongchu Du ◽  
Maximilian Kruth ◽  
Ulrich Simon ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Atomic Force Microscopy ◽  
Au Nanoparticles ◽  
Defect Formation ◽  
Subsequent Growth ◽  
Force Microscopy ◽  
Atomic Force ◽  
Oxygen Exchange Reaction ◽  
Defect Nucleation

We investigated the possibility of tuning the local switching properties of memristive crystalline SrTiO 3 thin films by inserting nanoscale defect nucleation centers. For that purpose, we employed chemically-synthesized Au nanoparticles deposited on 0.5 wt%-Nb-doped SrTiO 3 single crystal substrates as a defect formation template for the subsequent growth of SrTiO 3 . We studied in detail the resulting microstructure and the local conducting and switching properties of the SrTiO 3 thin films. We revealed that the Au nanoparticles floated to the SrTiO 3 surface during growth, leaving behind a distorted thin film region in their vicinity. By employing conductive-tip atomic force microscopy, these distorted SrTiO 3 regions are identified as sites of preferential resistive switching. These findings can be attributed to the enhanced oxygen exchange reaction at the surface in these defective regions.

Effect of Three Arm Polystyrene on Polystyrene Film Stability

2013 ◽  
Vol 481 ◽  
pp. 92-97
Author(s):  
Suntree Sangjan
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Polystyrene Film ◽  
Polymer Thin Film ◽  
Film Stability ◽  
Polymeric Thin Films ◽  
Force Microscopy ◽  
Atomic Force ◽  
Blended Polymer ◽  
The Stability

This research studied ways to increase the stability of a polymer thin film with a thickness of approximately 10 nm. Our system consisted of a polystyrene (PS) thin film filled with three arm polystyrene (TAP) as additives. Formation of dewetting was investigated by atomic force microscopy and optical microscopy which showed that complete dewetting of the pure PS film occurs after being annealed at 120 oC for 5 h. The dewetting dynamics were dramatically suppressed when a small amount of TAP polymer was added into the PS thin film. We hypothesize that the nitrogen atom in the TAP polymer provides dipolarity between the polymeric thin films and the substrate followed by an increase in the interfacial interaction of the TAP/PS thin films, which in turn leads to increased film stability. However, if the concentration of TAP is too high, this leads to phase separation of the thin films. We also observed that the amount of TAP within the PS thin film largely affected the efficiency of inhibiting dewetting. This method could be utilized for the study of the mechanism in a blended polymer film.

Epitaxial growth of PbTiO3 thin films on (001) SrTiO3 from solution precursors

1995 ◽  
Vol 10 (3) ◽  
pp. 680-691 ◽  
Author(s):  
Andreas Seifert ◽  
Fred F. Lange ◽  
James S. Speck
Keyword(s):  
Thin Films ◽  
Stable Phase ◽  
X Ray Diffraction ◽  
Amorphous Precursor ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron ◽  
Heat Treated ◽  
Film Substrate

A mixed alkoxide liquid precursor was used to form epitaxial PbTiO3 thin films by spin-coating on cubic (001) SrTiO3 substrates. The films were heat-treated at temperatures between 380 °C/1 h and 800 °C/1 h. X-ray diffraction, atomic force microscopy, scanning and transmission electron microscopy were used to characterize the microstructure of the films and to evaluate the epitaxial phenomena. At ∼400 °C/1 h, a polycrystalline, metastable Pb-Ti fluorite crystallizes from the pyrolyzed amorphous precursor. At slightly higher temperatures (∼420 °C/1 h), the thermodynamically stable phase with the perovskite structure epitaxially nucleates at the film/substrate interface. A small number of epitaxial grains grow through the film toward the surface and consume the nanocrystalline fluorite grains. Coarsening of the perovskite grains leads to a reduction in mosaic spread during further heating. Pores, which concurrently coarsen with grain growth, produce a pitted surface as they disappear from within the film. At 800 °C/1 ha dense epitaxial PbTiO3 film with a smooth surface is observed. Parameters governing the formation of a- and c-domains are discussed as well as the small tilts of the domain axes away from the substrate normal.

Chemically Deposited Silver Antimony Selenide Thin Films for Photovoltaic Applications

2009 ◽  
Vol 1165 ◽  
Author(s):  
Jorge G. Garza ◽  
Sadasivan Shaji ◽  
Ana Maria Arato Tovar ◽  
Eduardo Perez Tijerina ◽  
Alan Castillo Roderiguez ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Close Contact ◽  
Optical Transmittance ◽  
Halogen Lamp ◽  
X Ray ◽  
Force Microscopy ◽  
Glass Substrates ◽  
Atomic Force ◽  
Antimony Selenide

AbstractSilver antimony selenide (AgSbSe2) thin films were prepared by heating sequentially deposited antimony sulphide (Sb2S3), silver selenide (Ag2Se) and Ag thin films in close contact with a selenium thin film. Sb2S3 thin film was prepared from chemical bath containing SbCl3 and Na2S2O3, Ag2Se from the bath containing AgNO3 and Na2SeSO3 and Se thin films from an acidified solution of Na2SeSO3, at room temperature on cleaned glass substrates. Ag thin film was deposited by vacuum thermal evaporation. The annealing temperature was varied from 300-390°C in vacuum (∼10−3 Torr) for 1 h. X-ray diffraction analysis showed the films formed at 350 °C was polycrystalline AgSb(S,Se)2 or AgSbSe2 depending on selenium thin film thickness. Morphology of these films was analyzed using Atomic Force Microscopy and Scanning Electron Microscopy. The elemental analysis was done using Energy Dispersive X-ray technique. Optical characterization of the thin films was done by optical transmittance spectra. The electrical characterizations were done using Hall effect and photocurrent measurements. A photovoltaic structure: Glass/ITO/CdS/AgSbSe2/Ag was formed, in which CdS was deposited by chemical bath deposition. J-V characteristics of this PV structure showed Voc=370 mV and Jsc=0.5 mA/cm2 under illumination using a tungsten halogen lamp.

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