Despite recent exciting progress in catalysis by supported gold nanoparticles, there remains the formidable challenge of preparing supported gold catalysts that collectively incorporate precise control over factors such as size and size-distribution of the gold nanoparticles, homogeneous dispersion of the particles on the support, and the ability to utilize a wide range of supports that profoun...

We present an improvement in the electrical properties of silica nanotubes by coating metal nanoparticles on their surfaces. The silica nanotubes are formed from bacterial flagella bio-templates having a tubular structure. Successive depositions of metal nanoparticles on the silica nanotubes are performed through easily functionalized silica surfaces. The results show uniform metal nanoparticle...

Metal nanoparticles were utilized as heating elements within nanofibers to demonstrate an alternative approach to thermally process nanostructured polymeric materials. In the photothermal process, resonant light excites the surface plasmon of the nanoparticle and the absorbed energy is converted into heat due to electron-phonon collisions. This heating is efficient and strongly localized, gener...

Metal oxides play a very important role in many areas of chemistry, physics and materials science.The metal elements are able to form a large diversity of oxide compounds. In this investigation, wesynthesis SnO2 and C,N,S-tridoped SnO2 nanoparticles by precipitation method. The synthesizedSnO2 and C,N,S-tridoped SnO2 nanoparticles were characterized by instrumental analysis methods,such as X-ra...

Many catalysts consist of metal nanoparticles anchored to the surfaces of oxide supports. These are key elements in technologies for the clean production and use of fuels and chemicals. We show here that the chemical reactivity of the surface metal atoms on these nanoparticles is closely related to their chemical potential: the higher their chemical potential, the more strongly they bond to sma...

A bottom-up approach to produce a long-range ordered superlattice of monodisperse and isomorphic metal-oxide nanoparticles (NP) supported onto an oxide substrate is demonstrated. The synthetic strategy consists of self-assembling metallic NP on an ultrathin nanopatterned aluminum oxide template followed by a morphology-conserving oxidation process, and is exemplified in the case of Ni, but is g...

We report the application of palladium nanoparticles and thin films for hydrogen sensor. Electrochemically grown palladium particles with spherical shapes deposited on Si substrate and sputter deposited Pd thin films were used to detect hydrogen at room temperature. Grain size dependence of H(2) sensing behavior has been discussed for both types of Pd films. The electrochemically grown Pd nanop...

Since 1997 [1,2], water-solubilized and positively charged organo-building blocks of aminoclay nanoparticles (ACNPs) have attracted intensive academic and industrial interest for their multifaceted applications [3]. Engineered organic-inorganic ACNPs constituted of high-density amine groups and approximately 10% total amines in aqueous solution, when protonated, acquire a cationic surface prope...