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【期刊论文】Structural stability of icosahedral FePt nanoparticles
王荣明, Rongming Wang, *, a, b Hongzhou Zhang, c Michael Farled and Christian Kisielowskib
Nanoscale, 2009, 1, 276-279,-0001,():
-1年11月30日
The structural stability of FePt nanoparticles of about 5-6nm diameter was investigated by dynamic high resolution transmission electron microscopy. The FePt icosahedra were very stable under an electron beam flux of~20 A/cm2 at 300 kV. Surface sputtering was suppressed due to the large sputtering threshold energy of a Pt-rich shell. Under a flux of~50 A/cm2, the trapping potential well of the FePt particle on the supporting carbon film was lowered by the magnetic interaction between the electron beam and the particle, which leads to rotational and translational motions of the particle. A large dose of electrons (of~200 A/cm2) initiated melting and recrystallization of the FePt particle. The structure of the FePt nanoparticle, a Pt enriched shell around an Fe/Pt magnetic core, is believed to be responsible for its dynamic behaviour under different beam conditions.
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王荣明, Heng Li ab, Jingxia Wang *a, Zelin Pan a, Liying Cui a, Liang Xu a, Rongming Wang *b, Yanlin Song *a and Lei Jiang a
J. Mater. Chem., 2011, 21, 1730-1735,-0001,():
-1年11月30日
A fluorescence-amplifying method based on photonic crystal (PC) has been demonstrated for trace TNT detection. The fluorescence enhancement for TNT detection on the optimized PC can be up to 60.6-fold in comparison to that of the control sample, which combines the slow photon effect of PC and large surface areas of the inverse opal structure. Furthermore, the quenching efficiency of the PC-based sensor achieves 80% after exposure to TNT vapor for 300s. The results suggest that the fluorescenceamplifying method based on PC has enormous potential for the development of highly efficient fluorescence sensors toward detection of trace TNT or other explosives.
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【期刊论文】Platinum catalyzed growth of NiPt hollow spheres with an ultrathin shell
王荣明
,-0001,():
-1年11月30日
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【期刊论文】Fluorescence Enhancement by Heterostructure Colloidal Photonic Crystals with Dual Stopbands
王荣明
,-0001,():
-1年11月30日
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