Microbial infectious are becoming a global threat, which is a reason for rise in mortality of human beings. One of the reasons for this mortality has been the drug resistance in microbes. The drug resistance poses a m...Microbial infectious are becoming a global threat, which is a reason for rise in mortality of human beings. One of the reasons for this mortality has been the drug resistance in microbes. The drug resistance poses a major challenge for effective control of microbial infections, and this threat has prompted us to search for alternative strategy to control the microbial infections. Recently, nanomaterials have emerged as an alternative to conventional platforms because they combine multiple mechanisms of action into one platform due to the distinctive properties of nanosized materials. In the present research we have attempted to synthesize ZnO/CdS nanocomposite for its application as an antimicrobial agent. We have characterized the synthesized nanocomposites by X-ray diffraction (XRD), ultraviolet-visible spectroscopy (UV-Vis), photoluminescence spectroscopy (PL), field emission scanning electron microscopy (FESEM) and high-resolution transmission electron microscopy (HRTEM). The nanocomposites have exhibited good antibacterial property against Gram positive and Gram-negative organisms by virtue of the generation of reactive oxygen species (ROS) inside the cells, as reflected by ruptured appearances in the FESEM micrographs. Apart from antimicrobial activity, it also inhibited biofilm formations in Pseudomonas aeruginosa, a causative organism in lung infection and burn associated infections.展开更多
Constructing a one-dimensional(1D)core/shell heterostructure is a rational and efficient way to integrate multiple functional materials into a single device,in which a distinct and reliable interface and suitable ener...Constructing a one-dimensional(1D)core/shell heterostructure is a rational and efficient way to integrate multiple functional materials into a single device,in which a distinct and reliable interface and suitable energy-band alignment play important roles in optoelectronic applications.Here,using a typical magnetron sputtering system,we constructed a 1D ZnO/CdS/CdTe core/shell nanorod arrays radial heterojunction with a well-designed cascade type-II energy band alignment and improved the broadband photodetector(PD)performance.The well-formed shell layers compensated for the defect states on the ZnO surface and extended the photoresponse range from ultraviolet to visible and near-infrared.Moreover,reliable and distinct heterointerfaces with a cascade type-II energy band alignment can guarantee more stable carrier migration and reduce energy loss,promoting effective photogenerated charge carrier separation and resulting in an enhanced photoresponse.The optimised 1D ZnO/CdS/CdTe core/shell heterojunction PD exhibited a fast photoresponse at 0 V bias with high responsivity and detectivity.These results provide an important reference for the rational design and controllable synthesis of multifunctional optoelectronic nanodevices.展开更多
文摘Microbial infectious are becoming a global threat, which is a reason for rise in mortality of human beings. One of the reasons for this mortality has been the drug resistance in microbes. The drug resistance poses a major challenge for effective control of microbial infections, and this threat has prompted us to search for alternative strategy to control the microbial infections. Recently, nanomaterials have emerged as an alternative to conventional platforms because they combine multiple mechanisms of action into one platform due to the distinctive properties of nanosized materials. In the present research we have attempted to synthesize ZnO/CdS nanocomposite for its application as an antimicrobial agent. We have characterized the synthesized nanocomposites by X-ray diffraction (XRD), ultraviolet-visible spectroscopy (UV-Vis), photoluminescence spectroscopy (PL), field emission scanning electron microscopy (FESEM) and high-resolution transmission electron microscopy (HRTEM). The nanocomposites have exhibited good antibacterial property against Gram positive and Gram-negative organisms by virtue of the generation of reactive oxygen species (ROS) inside the cells, as reflected by ruptured appearances in the FESEM micrographs. Apart from antimicrobial activity, it also inhibited biofilm formations in Pseudomonas aeruginosa, a causative organism in lung infection and burn associated infections.
基金supported by the National Natural Science Foundation of China NSFC(62075041,62375049,62335003)the Basic Research Program of Jiangsu Province(BK20222007)。
文摘Constructing a one-dimensional(1D)core/shell heterostructure is a rational and efficient way to integrate multiple functional materials into a single device,in which a distinct and reliable interface and suitable energy-band alignment play important roles in optoelectronic applications.Here,using a typical magnetron sputtering system,we constructed a 1D ZnO/CdS/CdTe core/shell nanorod arrays radial heterojunction with a well-designed cascade type-II energy band alignment and improved the broadband photodetector(PD)performance.The well-formed shell layers compensated for the defect states on the ZnO surface and extended the photoresponse range from ultraviolet to visible and near-infrared.Moreover,reliable and distinct heterointerfaces with a cascade type-II energy band alignment can guarantee more stable carrier migration and reduce energy loss,promoting effective photogenerated charge carrier separation and resulting in an enhanced photoresponse.The optimised 1D ZnO/CdS/CdTe core/shell heterojunction PD exhibited a fast photoresponse at 0 V bias with high responsivity and detectivity.These results provide an important reference for the rational design and controllable synthesis of multifunctional optoelectronic nanodevices.
