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RISS 인기검색어
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- 저자 : FAMING GAO (검색결과 4 건)
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NA LI,FAMING GAO,LI HOU 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.7
We present, for the ¯rst time, a rational and general method to construct pearl-like chains ofplatinum (Pt) clusters with cytochrome c (cyt c) as building blocks, demonstrating the greatpotential of cyt c for the construction of nanoscale devices. We investigate the conditions whichshould be ful¯lled to grow pearl-like chains of Pt clusters on cyt c according to a selectivelyheterogeneous, template-controlled mechanism. Various mechanistic aspects of the single stepscomposing the metallization protocol has been addressed and discussed. The results indicate thatpH and the degree of reduction reaction can be considered as the key parameters for a \¯ne-tuning"of the metallization procedure. The formation mechanism has been extensively studied which isextremely important for future elaboration for the preparation of better-controlled structures.
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SYNTHESIS AND ORGANIZATION OF PLATINUM NANOPARTICLES AND NANOSHELLS ON A NATIVE VIRUS BIOSCAFFOLD
LI HOU,FAMING GAO,DANDAN TONG,YANG JIANG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.6
A wild type virion, bacteriophage T4, was used as an organic template for the controlled synthesisand organization of Pt nanoparticles and nanoshells on its capsid. A long incubation of T4 virionswith the metalchloride solution is necessary to the speci¯c binding of the external surface of T4capsid with Pt IV by means of interactions between Pt IV and the chemical functionality foundinherently on the surface of the proteinaceous viral capsid. After chemical reduction with dime-thylaminoborane (DMAB), the highly dispersive Pt nanoparticles with a uniform size of 3 – 4 nmwere synthesized and covered the whole viral capsid. The packing density of Pt nanoparticles wasenhanced by increasing the incubation cycles of the virions in metal salt solution. Moreover,Pt@T4 shell/core structures could be achieved by increasing the amount of metal ions aroundvirons. UV/vis spectroscopy was used to follow the course of the reaction, and the formationmechanism was discussed. Both the small Pt nanoparticles and Pt@T4 shell/core structures showhigh electrocatalytic activity in electrochemical measurement, and therefore are expected to havepotential applications in electrocatalysis.
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Mengmeng Zhao,Faming Wang,Chuansi Gao,Zhaoli Wang,Jun Li 한국섬유공학회 2022 Fibers and polymers Vol.23 No.2
In recent years, air ventilation garments (AVG) have been reported effective to improve thermal comfort. In thisstudy, an AVG incorporated with small fans was investigated on torso thermal comfort in moderate environment (Ta=25 oC,RH=50 %). Eight female subjects walked on the treadmill at a speed of 4 km·h-1 for 30 min and then rested for another30 min. During the whole test protocol, the AVG was worn in three conditions of flow rates to examine which flow rate wasthe best choice to keep thermal comfort: fans off with no air ventilation (a controlled condition, CON), low flow rate (12 l/s,LOW) and high flow rate (20 l/s, HIGH). Results showed that HIGH made significantly lowered local skin temperature of theabdomen, scapula and the lower back (p<0.05). The mean torso skin temperature in CON, LOW and HIGH in the last 5 minin the exercising stage was 32.3, 30.2 and 29.2 oC, respectively and it was 32.1, 29.5 and 28.2 oC, respectively in the restingstage. HIGH significantly mitigated thermal sensation in the 40 and 50th min (p<0.05), whereas it produced cool andunpleasant thermal sensation in the resting stage. In the whole test scenario, LOW produced the best torso thermal comfort. The low flow rate of ventilation (12 l/s) should be recommend and used in such a moderate environment to maintain torsothermal comfort.
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LI HOU,Yunfeng Niu,Yan Wang,YANG JIANG,Rongna Chen,Tianran Ma,FAMING GAO 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.6
Here, we present a simple and novel method based on using insulin amyloid fibrils (INSAFs) as sacrificial templates for the construction of Pt–Pd nanoparticle chains (Pt–PdNPCs) under mild conditions. By incubating INSAFs in metal salt solution and then reduction, Pt–Pd nanoparticles with an uniform particle size of around 2.5 nm nucleated and grew along the axial direction of INSAFs, and thus formed a long chain structure with length up to several micrometers. The as-prepared Pt–PdNPCs exhibit an improved catalytic activity for lowtemperature CO and methanol oxidation and possess greater CO tolerance compared with the commercial Pt/C catalyst, which makes them promising for a variety of possible catalytic applications.
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