08 polymer montmorillonite silver nanocomposite micro and nanoparticles prepared by in situ polymerization and electrospraying technique
Báo cáo " Silver nanoparticles prepared by laser ablation and their optical characteristics " pptx
... Binh et al / VNU Journal of Science, Mathematics - Physics 24 (2 008) 1-5 Using a Quanta Ray Pro 230 Nd: YAG laser in Q-switch mode we prepared silver nanoparticles from a metal silver plate in ... The Binh et al / VNU Journal of Science, Mathematics - Physics 24 (2 008) 1-5 The electron micrograph of silver nanoparticles obtained by a transmission electron microscope (TEM) was shown in Fig ... Absorption spectra of silver nanoparticles produced by laser ablation in a 0.003, 0.01 and 0.1M solution of PVA The silver nanoparticles produced in 0.01M concentration of PVA was observed by a transmission...
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Báo cáo hóa học: " Magnetic and Cytotoxicity Properties of La12xSrxMnO3 (0 £ x £ 0.5) Nanoparticles Prepared by a Simple " pptx
... estimated from XRD line-broadening (Table and Fig 2) The corresponding SAED patterns, given as insets in Fig 5, show spotty ring patterns suggesting a polycrystalline structure in all the prepared LSMO ... contamination in the samples with x = 0.1 and 0.2 The MS value increases as the Sr content increases and shows the highest value at x = 0.3 and then decreases as x increases to 0.5 These results indicate ... 0.5 are listed in Table and also displayed in Fig It is clearly seen that the crystallite size increases with increasing thermal decomposition temperature and decreases with the increase of Sr...
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Báo cáo hóa học: " In situ Polymerization of Multi-Walled Carbon Nanotube/Nylon-6 Nanocomposites and Their Electrospun Nanofibers" pot
... p-amino benzoic acid and methanol, and were finally dried under a reduced pressure for days at 100 °C In situ Polymerization of the Nanocomposites In situ polymerization of e-caprolactam in the ... (a) P-MWNTs and (b) F-MWNTs In situ Polymerization In situ polymerization of e-caprolactam in the presence of the F-MWNTs and the P-MWNTs was carried to prepare the F-MWNT/nylon-6 and the P-MWNT/nylon-6 ... WAXS patterns in the nanofibers were due to the small size of the crystal [48] Conclusions We prepared two kinds of the nanocomposites by using an in situ polymerization method in the presence...
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Báo cáo hóa học: " Improvement of photon extraction efficiency of GaN-based LED using micro and nano complex polymer structures" potx
... illuminated simultaneously onto the surface during the etching process [17] Details of material used as micro- and nanoscaled complex structure A high refractive index resin containing TiO2 nanoparticles ... Science Inc (Rolla, MO, USA) and used as an imprint resin to form the micro- and nanoscale complex structures since its n and k values are Figure Schematic diagram of fabrication of micro- and nanoscale ... spin-coating speed of the high refractive index polymer resin was carefully adjusted As shown in Figure 3a,c, in case of lower spin-coating speeds, high fidelity pattern transfer was achieved and...
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Báo cáo hóa học: "Nearly Monodispersion CoSm Alloy Nanoparticles Formed by an In-situ Rapid Cooling and Passivating Microfluidic Process" docx
... received from New Teacher Funds (2 008- 00061025) and SRF for ROCS and SEM by the Chinese Education Ministry, and Innovative Research Team of Chinese Education Ministry in University (IRT0512) at Beihang ... formation of an ultra-thin oxidation layer caused by including acetone in the quenching solution EDS data for the resulting NPs indicate the elemental oxygen appearing in those NPs (Fig 3d) Analysis ... Flow and temperature controller P1 V1 CoCl2 and SmCl3 mixture P2 H1 H2 Inlet V2 Reducing agent and stability Inlet TC1 N2 In N2 In Y-mixer N2 Out Reaction channel N2 Out TC2 N2 Out P3 N2 in V3...
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Synthesis and applications of polymer based micro and nanostructures
... [55] employed polymer substrates made by nanoimprint, and the Si masters they used in nanoimprinting were fabricated using the EBL and plasma etching method Due to the high cost and slow process ... of this study add to the existing knowledge of polymer nanofabrication by demonstrating the possibilities of fabricating polymer micro- and nanostructures in easy and costeffective ways The various ... PDMS mixture in (e) has a 5:1 pre -polymer to curing agent ratio as compared to 10:1 in (b)-(d), and therefore the nanopillars have higher stiffness than those in (d) and remain upstanding ……….56...
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Micro and nano structured functional materials by polymer aided self assembly
... and aggregation in condensed medium In conjugated electron rich polymers, co-operative electronic couplings and interactions between polymer chains are determined by polymer- polymer packing and ... Chapter Self induced micro- & nano-structuring of films interactions of the two domains with one another and solvent molecules become important in determining the size and shape of the resulting aggregates.73 ... donors, and C6035 (and derivatives) and TCNQ39-40 as acceptors New conjugated polymers have been synthesized and studied every year to meet the growing interest in using organic materials in semiconductor...
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Handbook of Micro and Nano Tribology P4
... profilometers, between 500 and µm by optical interferometry and between 100 µm and Å by scanning tunneling or atomic force microscopy The overlaps in the length scales between these instruments are used ... are made up of a single grain Also, machining processes such as turning, shaping, or milling can produce a textured surface that contain grooves made by moving the tool at a certain feed rate Although ... the following reason For any machining process, there exists a critical length scale below which the surface remains unaffected during machining For grinding, this length scale is the grain size...
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Handbook of Micro and Nano Tribology P8
... at a given point is referred to as the stiffness at that point and was determined by fitting a least-squares line through the nearby data points For bonded lubricant film, at the point where slope ... surface can be estimated by bringing the sample into contact with the tip and then measuring the maximum force needed to pull the tip and sample apart, Mate (1993) and Bhushan and Ruan (1994) Figure ... onto single-crystal silicon) on top of which a single, upper inverted bilayer of zinc arachidate (C20, ZnA) was deposited by the LB technique, Figure 8.12 Macro- and microscale friction and wear...
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Handbook of Micro and Nano Tribology P14
... displacement can be explained by the variations in intrinsic interatomic forces in the normal and lateral directions 14.4.2 Microscale Friction and Adhesion Friction and adhesion of magnetic ... References 14.1 Introduction Micro/ nanotribological studies are needed to develop fundamental understanding of interfacial phenomena on a small scale and to study interfacial phenomena in micro- and nanostructures ... Friction and Adhesion Nanoscale Friction • Microscale Friction and Adhesion 14.5 Scratching and Wear Nanoscale Wear • Microscale Scratching • Microscale Wear 14.6 Indentation Picoscale Indentation...
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Handbook of Micro and Nano Tribology P16
... as micromilling, microdrilling, microturning) or removal by energy beams (such as microspark erosion, focused ion beam, laser ablation, and machining, and laser polymerization) (Friedrich and ... Nonlithographic micromachining processes, primarily in Europe and Japan, are also being used for fabrication of millimeter-scale devices using direct material microcutting or micromechanical machining (such ... process and is routinely used to fabricate microstructures such as acceleration and pressure sensors and magnetic head sliders Surface micromachining is based on depositing and etching structural and...
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Handbook of Micro and Nano Tribology P5
... (1995), Advances in Acoustic Microscopy, Plenum, New York Burnham N A and Colton, R J (1993), “Force Microscopy,” in Scanning Tunneling Microscopy and Spectroscopy: Theory, Techniques and Applications ... conversion into distance and force, that is, the voltage driving the scanner, and the voltage corresponding to the cantilever position The thin lines indicate the cantilever instabilities, and the ... challenging Even if you understand your instrumental artifacts, and are confident about the interpretation of your data, you must still put your work in the context of the research and current thinking...
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Tài liệu Handbook of Micro and Nano Tribology P9 pptx
... have random protrusions rather than being periodically structured, we expect a smearing out of the correlated intermolecular interactions that are involved in film freezing and melting (and in phase ... both for increasing and decreasing loads two different curves are obtained These can be fitted to the JKR equation, Equation 9.20, to obtain the advancing (loading) and receding (unloading) surface ... displacement and resulting force law F(D) are deduced using Equations 9.4 and 9.5 For example, in SFA experiments, ∆D0 is changed by expanding a piezoelectric crystal by a known amount and the resulting...
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Tài liệu Colchero, J. et al. “Friction on an Atomic Scale”Handbook of Micro and Nano Tribology P6 Handbook of Micro/Nanotribology. Ed. Bharat ppt
... topographic image is obtained by adjusting the position of the sample to maintain a constant force Hence, minima and maxima of the normal force and of the topography coincide and are both shifted ... these minima (for example, the lines ζ or η in Figure 6.13), and thus in an energy “valley.” The tip will then stick in the nearest minimum until the shearing force built up during the scanning ... reconstructed from these signals Interestingly, a region exists around the lines containing the potential minima where the tip is caught in the valleys containing the potential minima, so that no jumps...
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Tài liệu Handbook of Micro and Nano Tribology P10 pptx
... loading rate against the suspending springs and detecting a change in velocity on contact with the surface In the testing mode, the load is incremented in order to maintain a constant loading ... (used in the continuous loading and unloading tests, or constant load indentation (used in the indentation creep test), or cyclic loading (using sawtooth or sinusoidal references, in the indentation ... employed as a servo-input signal and in turn different testing modes can be generated using an IND servo, constant indenter rate testing (typically used in the constant loading and unloading tests),...
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Tài liệu Handbook of Micro and Nano Tribology P1 ppt
... (1886), and related work by Petroff (1883) Since then, developments in hydrodynamic bearing theory and practice were extremely rapid in meeting the demand for reliable bearings in new machinery ... wheel bearings During and after the glory of the Roman empire, military engineers rose to prominence by devising both war machinery and methods of fortification, using tribological principles It ... friction and bearing development, and it was initiated on a largely empirical basis © 1999 by CRC Press LLC Since the beginning of the 20th century, from enormous industrial growth leading to demand...
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Tài liệu Handbook of Micro and Nano Tribology P2 ppt
... one shown in Figure 2.6, permit imaging at the highest resolution in all known imaging modes Since the thickness of the cantilever is determined by etching, it cannot be made as thin as in the silicon ... current source, since R must be large in this setup Plugging this equation into Equation 2.70 and neglecting the phase information, one obtains U out = U≈x ωRεε A (2.71) which is linear in the displacement ... return to the starting point The scanning pattern is characterized by the number of points along the line NP and the number of lines NL If the size of the scanning pattern is xP by yL, then one...
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Tài liệu Handbook of Micro and Nano Tribology P3 pptx
... sensitivity of IRS can be enhanced by multiple reflections in the surface films and by using grazing incidence angles Orientation of adsorbed molecules can be obtained by examining the polarization dependence ... ionized levels by the simple relation E final = E xray − E binding energy (3.15) Since the final energy is measured and the X-ray energy is known, one can determine the binding energy and consequently ... now be handled by modeling the background and subtracting it, leaving an enhanced AES peak Thus, the number of particles present can be obtained by finding the area under the peak, enhancing the...
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Tài liệu Handbook of Micro and Nano Tribology P7 pptx
... microscratching/microwear, nanofabrication/nanomachining, and nano/picoindentation using AFM and related instrumentation 7.2 Experimental Techniques 7.2.1 AFM for Microscratching/Microwear and Nanoindentation ... Microscratching/Microwear and Nanoindentation • Nano/Picoindenter 7.3 7.4 7.5 7.6 Microscratching/Microwear Studies Nanofabrication/Nanomachining Studies Nano/Picoindentation Closure References 7.1 Introduction ... 7 Microscratching/ Microwear, Nanofabrication/ Nanomachining, and Nano/Picoindentation Using Atomic Force Microscopy Bharat Bhushan 7.1 7.2 Introduction Experimental Techniques AFM for Microscratching/Microwear...
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Tài liệu Handbook of Micro and Nano Tribology P11 docx
... liquid temperatures are 1.0 nm and 297 K in (a), 1.6 nm and 297 K in (b), 1.25 nm and 297 K in (c), 1.25 nm and 250 K in (d), 1.8 nm and 297 K in (e), and 1.8 nm and 250 K in (f ) The light spheres ... are beginning to invite comparison with both nanoscale and microscale experiments 11.3.5 Adhesion Adhesion can be studied by bringing two materials into contact and then separating them or by separating ... embedding energies while maintaining their individual material cohesive binding Advancing the tip past the JC point caused indentation of the gold substrate accompanied by the characteristic increase...
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