Preparation and characterization of positively surface charged zinc oxide nanoparticles against bacterial pathogens.

Undoped zinc oxide (ZnO) and nitrogen-doped zinc oxide (NZO) thin films were prepared on transparent conducting oxide-coated glass substrates by employing sol–gel technique. The effect of different solvents and nitrogen doping on the optical, structural, and electrical properties was investigated by UV–visible absorption spectroscopy, atomic force microscopy (AFM), X-ray diffraction (XRD), profilometry, and Hall effect studies. ZnO films yielded transmittance above 85% and the bandgap of ZnO thin films decreased with doping. XRD pattern confirmed hexagonal wurtzite structure of ZnO. NZO thin films were found to be in the nano-thin film phase with thickness of 40 nm. Hall effect studies yielded carrier concentration of 1.2 × 1015 cm−3 and 2.03 × 1014 cm−3, respectively, for undoped and doped ZnO thin films. The changes in vibrational modes of ZnO due to nitrogen doping were detected using Fourier transform infrared (FTIR) analysis. It was found that p-type doping, leading to an improved surface morphology, led to a reduction in optical bandgap and an increased charge carrier mobility. The choice of the solvent was found to have a profound influence on the surface morphology, optical bandgap, tail states distribution, and charge carrier mobility.

Opto-electronic properties of solution-processed zinc oxide thin films: role of solvents and doping

The Fabrication of Porous ZnO Nanorods through Two-Step Aqueous Synthesis, and Their Properties

The invention discloses ultrasonic vibration assisted vacuum slow vapor deposition equipment, and belongs to the technical field of vapor deposition equipment. The equipment comprises a heating chamber and a vacuum box cover above the heating chamber, wherein a micro-deposition crucible is sequentially arranged between the vacuum box cover and a base bottom of the heating chamber from top to bottom, a confluence plate is arranged below the micro-deposition crucible, and graphite heating electrodes are arranged around the micro-deposition crucible and connected with the confluence plate throughsoft busbars; and an ultrasonic vibration auxiliary system is arranged inside the confluence plate, the ultrasonic vibration auxiliary system involves an amplitude-change rod and an energy converterarranged below the amplitude-change rod, the energy converter is connected with a circuit in the confluence plate, and the amplitude-change rod is located right under the micro-deposition crucible. According to the ultrasonic vibration assisted vacuum slow vapor deposition equipment, the graphite electrodes are adopted to directly heat the micro-deposition crucible, so that the electric and thermal energy loss is reduced, and the internal temperature of the crucible is uniform in the deposition process.

Ultrasonic vibration assisted vacuum slow vapor deposition equipment

Structural and optical properties of porous ZnO nanorods synthesized by a simple two-step method

The invention provides a powder surface metallization method and device. The powder surface metallization method comprises an air guide pipe, a heating pipe, a heater and a dispersing device, wherein an air inlet and an air extracting hole are formed in one end of the air guide pipe, the other end of the air guide pipe communicates with one end of the heating pipe, and the other end of the heating pipe communicates with the dispersing device; the dispersing device comprises a rotary dispersing mechanism and a stirring mechanism; the rotary dispersing mechanism comprises a dispersing cavity and a first motor; and the stirring mechanism comprises a stirring component and a second motor. The surface metallization method of the powder surface metallization device comprises the following steps that under a sealing condition, under an inert atmosphere, metal powder in the heating pipe is heated to a molten state at a proper temperature and pressure, and the first motor and the second motor are started, so that the powder is in a suspension state; and after the metallization is ended, the powder is taken out to obtain a finished product, a metal film can be formed on the surface of the powder body, and the thickness of the metal film on the surface of the powder material can be accurately controlled.

Powder surface metallization method and device

The invention relates to the technical field of capacitor processing. The invention discloses a device for processing a supercapacitor. Slideways are arranged on two opposite inner walls of a frame respectively; a pressing device is installed on the frame through a first supporting frame; a cushion block is arranged at the upper end of a lifting device; the cushion block is arranged under a notch;the cushion block reciprocates in the vertical direction; a semi-cylindrical boss is arranged at the upper end of the cushion block; the axial direction of the boss is parallel to the center line ofthe cushion block in the length direction; the left end and the right end of the boss are flush with the left end and the right end of the cushion block; the diameter of the boss is equal to the horizontal distance between the two supporting legs in the standard state; the standard state is that the supporting legs do not incline, the opposite ends of side pressing devices are provided with pushing blocks respectively, the pushing blocks are arranged right in front of and right behind the notch, and the cushion block pushing blocks reciprocate in the front-back direction. According to the device, the supporting legs are arranged and kept in a normal level, cutting by workers or cutting by a machine in the next step is facilitated, unnecessary labor force is saved, and the machining efficiency is improved.

Device for processing supercapacitor

The invention relates to a solar power generator based on a low-dimensional photoelectric material. In the prior art, problems of a solar power generator based on a low-dimensional photoelectric material is poor in self-cleaning capability and cyclic cleaning is incapable are solved. A fixed disc and a rotating disc which are matched with each other in a set are adopted, the position of a slidewayis changed by rotating a rotating disc, so switching between water supply and air supply is realized, the flushed water or gas is subjected to cleaning treatment through an activated carbon plate ina filtering and cleaning device in the rotating disc, cyclic use is realized, a solar cell panel is thoroughly cleaned through a high-pressure air injection device, a cleaning scraper, a high-pressurewater spraying device and a cleaning sponge on a rotating cylinder, moreover, a water storage device can store water resources in rainy days, so the solar cell panel is convenient to use in drought days. The solar power generator is ingenious in structure, remarkably improves the self-cleaning capability of the solar cell panel, achieves recycling of water resources, saves energy, is further suitable for the field drought environment with a severe condition, and is worthy of popularization and application.

Solar power generator based on low dimensional photoelectric material

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Papers

Structural and optical properties of porous ZnO nanorods synthesized by a simple two-step method

Powder surface metallization method and device

Device for processing supercapacitor

Solar power generator based on low dimensional photoelectric material