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Weijun Fang,Qiuxiang Zheng,Ying Fang,Hua-Bin Huang 한국물리학회 2019 Current Applied Physics Vol.19 No.2
The development of a highly effective and recyclable antibacterial agent is of great interest. In this work, magnetic Fe3O4/Ag antibacterial nanoagent was successfully fabricated through a facile surface functionalization approach. Utilizing the strong interaction between silver and the amino groups on the surface of Fe3O4 nanospheres, the nanosized silver particles were tightly bonded on the Fe3O4 nanospheres' surface, improving silver nanoparticalsʼ antibacterial activity by preventing agglomeration of silver nanoparticles. Our antibacterial tests showed that the as-synthesized Fe3O4/Ag nanospheres presented high antibacterial performance against Gram-negative and Gram-positive bacteria. Moreover, these antibacterial nanohybrids can be easily recycled from water solution by applying an external magnetic field. Overall, taking into consideration the facile preparation method, excellent antibacterial activity and high magnetic recycling property, the as-synthesized Fe3O4/Ag nanospheres have great potential applications in medicine and water disinfection.
Rapid Detection of Trace 1,4-Dichlorobenzene Using Laser Mass Spectrometry
Ding, Lei,Ma, Jing,Zheng, Haiyang,Fang, Li,Zhang, Weijun,Kim, Duk-Hyeon,Cha, Hyung-Ki Korean Chemical Society 2006 Bulletin of the Korean Chemical Society Vol.27 No.9
The 1+1 two-photon Resonant Enhanced Multiphoton Ionization (REMPI) spectra of 1,4-dichlorobenzene was obtained from 240 nm through to 250 nm on a laser mass spectrometer. Special care was taken to build up a heatable sample inlet system suitable for detecting a trace semi-volatile organic compound and reducing the memory effort on the inner wall of the inlet system. The detection limits of 1,4-dichlorobenzene in ppbV/V concentration range at certain wavelengths are presented.
Rapid Detection of Trace 1,4-Dichlorobenzene Using Laser Mass Spectrometry
Lei Ding,Jing Ma,Haiyang Zheng,Li Fang*,Weijun Zhang,Dukhyeon Kim,Hyungki Cha* 대한화학회 2006 Bulletin of the Korean Chemical Society Vol.27 No.9
The 1+1 two-photon Resonant Enhanced Multiphoton Ionization (REMPI) spectra of 1,4-dichlorobenzene was obtained from 240 nm through to 250 nm on a laser mass spectrometer. Special care was taken to build up a heatable sample inlet system suitable for detecting a trace semi-volatile organic compound and reducing the memory effort on the inner wall of the inlet system. The detection limits of 1,4-dichlorobenzene in ppbV/V concentration range at certain wavelengths are presented.