Phytosynthesis of metal nanoparticles is gaining importance due to their biocompatibility,low toxicity and eco-friendly nature.In the present study,an aqueous extract of Jatropha seedcake(JSC)is assessed as a reducing...Phytosynthesis of metal nanoparticles is gaining importance due to their biocompatibility,low toxicity and eco-friendly nature.In the present study,an aqueous extract of Jatropha seedcake(JSC)is assessed as a reducing and stabilizing agent for the synthesis of silver nanoparticles(AgNPs).The maximum reduction of silver ions occur when 1 mM AgNO_(3) solution is treated with 0.1 volume fraction of JSC extract in boiling water bath for 10 min.The synthesis of AgNPs is monitored by the excitation of surface plasmon resonance using UV-vis spectrophotometry.The AgNPs are found to be mono-dispersed,spherical with average particle size of 10.48±74 nm when analyzed by transmission electron microscopy.The selected area electron diffraction(SAED)ring pattern indicated the polycrystalline nature of the AgNPs.The x-ray diffraction data further confirm the presence of characteristic(111),(200),(220),(311)and(222)diffraction planes of face centered cubic structure,and the calculated lattice parameter comes out to be 4.083Å.FTIR analysis reveals the involvement of proteins and phenols in reduction and stabilization of nanoparticles.The synthesized AgNPs have significant antibacterial action on both the Gram positive and negative bacteria.展开更多
In recent years,Rhenium-based chalcogenides have gained traction as promising materials for optoelectronic applications.The photoresponse of the as-grown rhenium chalcogenide ReS_(2-x)Se_(x)(x=0,1,2)single crystals wa...In recent years,Rhenium-based chalcogenides have gained traction as promising materials for optoelectronic applications.The photoresponse of the as-grown rhenium chalcogenide ReS_(2-x)Se_(x)(x=0,1,2)single crystals was investigated under varying incident wavelengths and bias conditions of 0 and+3 V.X-ray photoelectron spectroscopy,scanning electron microscopy,and transmission electron microscopy were performed to assess the crystal structure and surface quality for photodetection applications.The photodetection properties indicate favorable potential for switching applications within the photocurrent range of 10^(−9) A.Notably,the photoresponse of ReS_(2-x)Se_(x)(x=0,1,2)exhibited significant enhancement,achieving responsivity of 4.78×10^(−3) A/W,detectivity of 9.16×10^(9) Jones,and response time of<0.2 s.These values demonstrate the potential of these single crystals for advanced optoelectronic applications.展开更多
The SnS thin films were synthesized by chemical bath deposition （CBD）, dip coating and successive ionic layer adsorption and reaction （SILAR） techniques. In them, the CBD thin films were deposited at two tem- pera...The SnS thin films were synthesized by chemical bath deposition （CBD）, dip coating and successive ionic layer adsorption and reaction （SILAR） techniques. In them, the CBD thin films were deposited at two tem- peratures： ambient and 70℃. The energy dispersive analysis of X-rays （EDAX）, X-ray diffraction （XRD）, Raman spectroscopy, scanning electron microscopy （SEM） and optical spectroscopy techniques were used to characterize the thin films. The electrical transport properties studies on the as-deposited thin films were done by measuring the I-V characteristics, DC electrical resistivity variation with temperature and the room temperature Hall effect. The obtained results are deliberated in this paper.展开更多
文摘Phytosynthesis of metal nanoparticles is gaining importance due to their biocompatibility,low toxicity and eco-friendly nature.In the present study,an aqueous extract of Jatropha seedcake(JSC)is assessed as a reducing and stabilizing agent for the synthesis of silver nanoparticles(AgNPs).The maximum reduction of silver ions occur when 1 mM AgNO_(3) solution is treated with 0.1 volume fraction of JSC extract in boiling water bath for 10 min.The synthesis of AgNPs is monitored by the excitation of surface plasmon resonance using UV-vis spectrophotometry.The AgNPs are found to be mono-dispersed,spherical with average particle size of 10.48±74 nm when analyzed by transmission electron microscopy.The selected area electron diffraction(SAED)ring pattern indicated the polycrystalline nature of the AgNPs.The x-ray diffraction data further confirm the presence of characteristic(111),(200),(220),(311)and(222)diffraction planes of face centered cubic structure,and the calculated lattice parameter comes out to be 4.083Å.FTIR analysis reveals the involvement of proteins and phenols in reduction and stabilization of nanoparticles.The synthesized AgNPs have significant antibacterial action on both the Gram positive and negative bacteria.
文摘In recent years,Rhenium-based chalcogenides have gained traction as promising materials for optoelectronic applications.The photoresponse of the as-grown rhenium chalcogenide ReS_(2-x)Se_(x)(x=0,1,2)single crystals was investigated under varying incident wavelengths and bias conditions of 0 and+3 V.X-ray photoelectron spectroscopy,scanning electron microscopy,and transmission electron microscopy were performed to assess the crystal structure and surface quality for photodetection applications.The photodetection properties indicate favorable potential for switching applications within the photocurrent range of 10^(−9) A.Notably,the photoresponse of ReS_(2-x)Se_(x)(x=0,1,2)exhibited significant enhancement,achieving responsivity of 4.78×10^(−3) A/W,detectivity of 9.16×10^(9) Jones,and response time of<0.2 s.These values demonstrate the potential of these single crystals for advanced optoelectronic applications.
基金the Department of Atomic Energy (DAE)–BRNS,Mumbai,India for providing financial assistance through DAE-BRNS Major Research Project (No. 2010/34/34/BRNS/2060) dated 13th December 2010 for carrying out this research
文摘The SnS thin films were synthesized by chemical bath deposition （CBD）, dip coating and successive ionic layer adsorption and reaction （SILAR） techniques. In them, the CBD thin films were deposited at two tem- peratures： ambient and 70℃. The energy dispersive analysis of X-rays （EDAX）, X-ray diffraction （XRD）, Raman spectroscopy, scanning electron microscopy （SEM） and optical spectroscopy techniques were used to characterize the thin films. The electrical transport properties studies on the as-deposited thin films were done by measuring the I-V characteristics, DC electrical resistivity variation with temperature and the room temperature Hall effect. The obtained results are deliberated in this paper.
