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The particles grown in gas phase of carbon sputtering plasmas were observed, and analyzed in chemical composition and atomic arrangement. The atomic arrangement obviously changed from amorphous to crystalline with addition of fluorine-contained gas (CF4). The fluorine atom enhanced the formation of nano-sized particles with graphite structure. The fluorine content was not be found in the crystalline...
This work covers an area of miniaturized electrochemical systems for detection of substances matters in aqueous solutions. Multiwalled carbon nanotubes powder has been used for preparation of screen-printable paste nanocomposition using suitable polymer vehicle. Fabricated electrode has been used for electrochemical analysis of cadmium and lead ions in acetate buffer solution using differential pulse...
Carbon nanotubes (CNTs) offer unique properties such as the highest current density, ballistic transport, ultrahigh thermal conductivity, and extremely high mechanical strength. Because of these remarkable properties, they have been expected for use as wiring materials and as alternate channel materials for extending complementary metal-oxide-semiconductor (CMOS) performance in future very large scale...
Bio- and nano-material arrays have attracted significant attention due to their importance in a number of research and application fields, such as biology, sensors, devices, etc. How to generate these arrays in a controlled manner is critical. In this talk, we introduce several methods developed in our group to show how to control the growth of bio- and nanoarrays on patterned solid substrates. By...
RuO2 nanocrystals (NCs) were deposited on carbon nanotubes (CNTs) by reactive RF magnetron sputtering using a Ru target under different conditions. Their surface morphology, structural, spectroscopic and field emission (FE) properties were studied using field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM), Raman spectroscopy, and a home made high vacuum FE...
In this study, we are focusing on the detailed control of the size and density of nanoparticles on the substrate by employing the gas-phase catalyst. To fabricate iron (Fe) nanoparticles as catalyst, Fe(CO)5 gas was used. Size and density of the nanoparticles can be controlled by varying the experimental parameters, such as the molar flow rate, the decomposition temperature and the flow time. Quartz...
Micellles of poly(cyclohexyl metharylate)-block-poly(2-vinylpyridine) (PCMA-b-P2VP) block copolymer in methanol were used as nanoreactors to fabricate FeCl3 nanoparticles. Then the FeCl3-loaded micelles solution was used as an ink to print films with polydimethylsiloxane (PDMS) stamps, different morphologies of the FeCl3-loaded micellar films were left onto silicon substrates after printed. After...
Carbon nanotubes (CNTs) films were synthesized at low pressure using nickel as catalyst by thermal chemical vapor deposition with hydrogen-acetylene mixture. The Raman characteristics and morphological features of CNTs at different substrate temperatures were investigated. The variation of CNTs morphological feature mainly depends on the substrate temperatures. In the low temperature range (450-550degC),...
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