Jinhai Niu

Atmospheric cold plasma jet for plant disease treatment

This study shows that the atmospheric cold plasma jet is capable of curing the fungus-infected plant leaves and controlling the spread of infection as an attractive tool for plant disease management. The healing effect was significantly dependent on the size of the black spots infected with fungal cells and the leaf age. The leaves with the diameter of black spots of <2u2009mm can completely recover from the fungus-infected state. The plasma-generated species passing through the microns-sized stomas in a leaf can weaken the function of the oil vacuoles and cell membrane of fungal cells, resulting in plasma-induced inactivation.

Atmospheric-pressure microplasmas with high current density confined inside helium-filled hollow-core fibers

We report on the generation and confinement of atmospheric-pressure microplasmas inside the 100-to-2000-μm-inner-diameter (i.d.) hollow-core fibers (HCFs) filled with helium gas. The microplasma propagation inside these 10-cm-long HCFs results from the anode-driven pulse discharges with their durations of 30u2009ns–15u2009μs. The pulse current density generated at an i.d. of 100u2009μm is about four magnitudes higher than the glow-like one at an i.d. of 2000u2009μm. Analysis shows that the generation of the microplasmas with high current density can be explained by the confinement mechanism of HCFs with small i.d. values and low surface recombination rate.

Pebrine Disease of Chinese Silkworm Controlled by Using Atmospheric Cold Plasma Jet

Tussah pebrine disease resulting from Nosema bombycis (NB) spores causes massive production and economic losses in the silk industry in China. This paper reports on highly effective inactivation of NB spores for the control of pebrine disease by using an atmospheric pressure cold plasma jet. Both Giemsa dyeing measurement and tussah breeding experiment show that the atmospheric pressure He plasma jet containing 1% <formula formulatype=inline> <tex Notation=TeX>

The Inactivation of Resistant Candida Albicans in a Sealed Package by Cold Atmospheric Pressure Plasmas

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Structural and electrical evolution of He ion irradiated hydrocarbon films observed by conductive atomic force microscopy

</tex></formula> kills almost all the NB spores with a <formula formulatype=inline> <tex Notation=TeX>

Large-area surface modification of polymers using a cold pulsed glow discharge

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The influence of helium ion irradiation on amorphous hydrocarbon films

</tex></formula> population within an exposure time of 5 min. Scanning electron microscopy measurements and UV absorbance spectra show that plasma inactivation has withered up the NB spores and resulted in the spores inactivated. Both energy dispersive spectroscopy and optical emission spectroscopy measurements showed that plasma-created reactive particles, such as O and accompanied charged species can play an important role in the inactivation processing.