a b C 女 Electron beam TEM Electron beam TEM Electron beam STEM Vacuum Vacuum Vacuum Differential aperture Membrane Membrane Vapour Membrane Sample support Liquid Liquid Nanoparticles Support Labels Support Nanoparticles Cell Transmitted electrons Transmitted electrons Scattered electrons 11
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Our thin-film heating system for the gas holder discretely heats samples up to 800C.Heating is controlled via a custom- designed control box featuring closed-loop temperature control and software that interfaces with a calibrated sensor on the chip. a C membrano bottom die 000000 heater,wincows gas iniet gas outlet 1 mm 100m b d 必 10m 12
12 Our thin-film heating system for the gas holder discretely heats samples up to 800ºC. Heating is controlled via a customdesigned control box featuring closed-loop temperature control and software that interfaces with a calibrated sensor on the chip
Breaking up of Au nanowires during Heating 6090 20 809e 9090 150( 2000℃ After cooling start to break J.B.Wu,Science China Materials,2015 13
13 Breaking up of Au nanowires during Heating J. B. Wu, Science China Materials, 2015
Composition Redistribution in Pt-Ni Octahedral Catalysts Vacuum ORR 200℃ ●Platinum ●Nickel dislocation movement and site suface composition fuel cell ORR catalyst 1.0 6500 Ni2p Ni2+ 0- 0.9 2.8 satellite ◆ 2.4 2 0.8 510152025 ◆ t(min) 5500 E[V)VS.RHE 0.7 d=0.633+0.375e014 5000 0.6 0 510152025 880 870 860 850 0.2 0.4 0.6 0.81.0 BE(ev) t(min) E(V)vs.RHE Jianbo Wu,AlChE Journal,2016 14
Composition Redistribution in Pt-Ni Octahedral Catalysts 14 Jianbo Wu, AIChE Journal, 2016
Phase Transformation 0000D000 a 00007975 10nm d0007a75 e00077a2 10nm 。 Jianbo Wu in preparation 15
15 Phase Transformation Jianbo Wu in preparation