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ABSTRACT: The current paper reports on the relase properties of conductive fabrics coated with proteinaceous microspheres containing a dye. The release of the dye was achieved by passing an electric current through the fabric. The conductivity of the polyester fibers resulted from nanosilver (Ag NPs) coated on the surface of these fibers. Both types of coatings (nanosilver coating and the coating of the proteinaceous microspheres) were performed using high-intensity ultrasonic waves. Two different types of dyes, hydrophilic RBBR (Remazol Brilliant Blue R) and hydrophobic ORO (Oil Red O), were encapsulated inside the microspheres (attached to the surface of polyester) and then released by applying an electric current. The Proteinaceous Microsphere (PM)-coated conductive fabrics could be used in medicine for drug release. The encapsulated dye can be replaced with a drug that could be released from the surface of fabrics by applying a low voltage.
ACS Applied Materials & Interfaces 05/2012; · 4.53 Impact Factor
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ABSTRACT: Titanium oxide (TiO(2)) nanoparticles (NPs) in their two forms, anatase and rutile, were synthesized and deposited onto the surface of cotton fabrics by using ultrasonic irradiation. The structure and morphology of the nanoparticles were analyzed by using characterization methods such as XRD, TEM, STEM, and EDS. The antimicrobial activities of the TiO(2)-cotton composites were tested against Escherichia coli (gram-negative) and Staphylococcus aureus (gram-positive) strains, as well as against Candida albicans. Significant antimicrobial effect was observed, mainly against Staphylococcus aureus. In addition, the combination of visible light and TiO(2) NPs showed enhanced antimicrobial activity.
Chemistry 03/2012; 18(15):4575-82. · 5.93 Impact Factor
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ABSTRACT: A mixture of Fe(AcAc)(2) and Co(AcAC)(2) was thermolyzed in a closed cell under the autogenic pressure of the reactants. The nature of the products was temperature dependent. The reaction is a one-stage, simple, efficient, and solvent-free method to prepare FeCo alloy nanoparticles protected by a carbon shell. Particle sizes of 60-150 were obtained covered by a carbon layer of 3-4 nm. The air stability of these particles is also demonstrated.
Inorganic Chemistry 02/2011; 50(4):1288-94. · 4.60 Impact Factor
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ABSTRACT: Silver nanoparticles were synthesized and deposited on different types of fabrics using ultrasound irradiation. The structure of silver-fabric composites was studied by physico-chemical methods. The mechanism of the strong adhesion of silver nanoparticles to the fibers is discussed. The excellent antibacterial activity of the Ag-fabric composite against Escherichia coli (gram-negative) and Staphylococcus aureus (gram-positive) cultures was demonstrated.
Nanotechnology 06/2008; 19(24):245705. · 3.98 Impact Factor
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Advanced Functional Materials 05/2008; 18(11):1641 - 1653. · 10.18 Impact Factor
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ABSTRACT: The first ever synthesis of submicron-sized rare earth hexaborides (RB6; R = La, Ce, Nd, Sm, Eu, and Gd) with a cubic morphology has been obtained by the single-step synthesis of the RAPET (reaction under autogenic pressure at elevated temperature) technique at a relatively low temperature of 900 °C using metal acetate precursors. The synthesized materials have been characterized for their structural (XRD, XPS, and Raman) and morphological (TEM, HRTEM, and FESEM) properties. The XRD pattern confirms the phase purity and the formation of a single phase compound of rare earth hexaborides. Raman spectra elucidate the active vibrational modes of the hexaborides. The TEM and FESEM images clearly show that the hexaborides are submicron in size with a cubic morphology. The SAED patterns reveal the single crystalline nature of the products.
01/2008;
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ABSTRACT: Single-crystalline W18O49@C core−shell nanorods were prepared by a simple and economical method using a naturally occurring biopolymer, chitosan, as a template. The core−shell nanorods were characterized by CHN, XRD, BET, SEM, and HRTEM analysis. The HRTEM shows that each nanorod is made up of bundle of tiny nanorods with diameters of 2−3 nm. The capacitance properties were studied in 1 M H2SO4 and 1 M Na2SO4 using cyclic voltammetry. W18O49@C prepared at 973 K shows higher capacitance compared to W18O49@C prepared at 1023 K in both acid and aqueous mediums.
01/2008;
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ABSTRACT: To realize a suitable supercapacitor nanomaterial, the recently developed technique of reaction under autogenic pressure at elevated temperature has been employed by us to synthesize SnO2 hexagonal nanocrystals and SnO2@C nanocomposites. The synthesis at different temperatures (viz. 500, 600, and 700 °C) yields three different composites. Characterization of these composites by various methods confirms the structural (XRD, Raman, FT-IR) and nanoparticulate (TEM, HRTEM) nature of the synthesized materials. TEM studies including HRTEM reveal that all the synthesized SnO2 and SnO2@C nanomaterials are highly crystalline with hexagonal shape. Cyclic voltammetric studies carried out to examine the capacitance of SnO2@C in 1 M H2SO4 show that the nanocomposite prepared at 700 °C has a maximum specific capacitance of 37.8 F/g at a scan rate of 5 mV/s.
01/2008;
