蒋昌忠
纳米晶体材料,光电功能薄膜, 金属薄膜,非晶态薄膜,薄膜材料的光学非线性效应研究
个性化签名
- 姓名:蒋昌忠
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
原子核物理学
- 研究兴趣:纳米晶体材料,光电功能薄膜, 金属薄膜,非晶态薄膜,薄膜材料的光学非线性效应研究
蒋昌忠,1962年生,教授,博士生导师,法国里昂Claude Bernard第一大学材料物理系博士,曾任物理科学与技术学院党委书记、常务副院长。兼职湖北省核学会第三届理事会常务理事兼副秘书长、湖北省青年联合会第十届委员会委员、中国仪表功能材料学会理事、中国电镜学会仪器专业委员会委员等。
主要研究领域:纳米晶体材料,光电功能薄膜, 金属薄膜,非晶态薄膜,薄膜材料的光学非线性效应研究。对离子束方法合成材料、离子束表面改性、加速器和离子注入机、扫描电子显微学等理论和实践有深入的研究。
在国内外学术刊物上共发表科研论文45篇。主持了国家自然科学基金项目3项,教育部重点项目一项,教育部研究项目2项,横向科研项目一项。参加过十多项国家、省部级科研项目。
主要科研成果如下:1)利用加速器--透射电镜联机装置原位观测了离子注入形成纳米晶体的过程;用透射电镜原位退火实验,原位观察了纳米颗粒在退火过程中的成核、生长变化规律;2)用蒙特卡罗方法模拟了电子束和固体相互作用的全过程,研究并论证了具有探测高能同轴背反射电子功能的新型扫描电子显微镜的可行性;3)用离子注入的方法成功制备Ag-Cu合金、Zn-ZnO核壳结构纳米颗粒;4)首次分析并解释了离子注入法形成含空洞纳米颗粒的机理,解决了这一国际上已被发现但没有解决的问题;5)首次成功制备了金属壳-空洞-金属内核三层结构纳米颗粒,并解释了其形成的机理;6)对离子注入形成的纳米颗粒进行了较为系统的高分辨电子显微学研究,发现了晶格扭曲、位错、层错、孪晶等现象。
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474
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成果数
11
【期刊论文】Interface influence on the surface plasmon resonance of Ag nanocluster composite
蒋昌忠, Feng Ren a, b, Changzhong Jiang a, *, Chang Liu a, Dejun Fu a, Ying Shi a
Solid State Communications 135(2005)268-272,-0001,():
-1年11月30日
Ag nanoclusters embedded in silica matrix were formed by ion implantation to different doses. The intensity of surface plasmon resonance absorption enhances with the increasing of the implanted dose, but decreases at dose higher than 1
A., Nanocluster composites, D., Ion implantation, D., Surface plasmon resonance absorption
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【期刊论文】Alloy and Core-Shell Nanoclusters Formed by Sequential Ion Implantation and Thermal Annealing
蒋昌忠, Feng Ren and Chang-Zhong Jiang* Chang Liu and Yin Shi Jian-Bo Wang
Journal of the Korean Physical Society, Vol. 46, May 2005, pp. S43-S47,-0001,():
-1年11月30日
Ag-Cu alloy nanoclusters have been formed by sequential ion implantation. As the as-implanted sample is annealed in a reducing atmosphere, the optical absorption spectrum displays a new shoul- der peak. Transmission electron microscopy bright-field image, selected area electron diffraction pattern and high-angle annular dark field scanning transmission electron microscopy image analy- ses show that core-shell nanoclusters have been fabricated. The evolution of core-shell nanoclusters at elevated temperature was also studied.
Ion implantation,, Nanoclusters composites,, Core-shell structure,, Annealing,, Z-contrast
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蒋昌忠, F. Ren a, b, C.Z. Jiang a, H.B. Chen c, Y. Shi a, C. liu a, J.B. Wang a
Physica B 353(2004)92-97,-0001,():
-1年11月30日
The preparation of metal alloy and monoelemental nanoclusters in silica by Ag, Cu ion sequential implantation and annealing in selected oxidizing or reducing atmosphere is studied. The formation of metastable Ag-Cu alloy is verified in the as-implanted samples by optical absorption spectra, selected area electron diffraction and energy dispersive spectrometer spectrum. The alloy is discomposed at elevated annealing temperature in both oxidizing and reducing atmospheres. The different effects of annealing behaviors on the Ag-Cu alloy nanoclusters are investigated.
Ion implantation, Nanocluster composites, Alloy, Annealing
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蒋昌忠, F. Rena, C.Z. Jiang a, b, *, L. Zhang a, Y. Shi a, J.B. Wang a, R.H. Wang a
Micron 35(2004)489-493,-0001,():
-1年11月30日
We report on the formation of alloy nanoclusters in silica by Ag/Cu ion sequential implantation. The formation of alloy nanocluster has been evidenced by optical absorption spectra, selected area electron diffraction and energy dispersive X-ray spectra. The microstructure characters of nanoclusters have been studied by high resolution transmission electron microscopy. The lattice distortion of some nanoclusters has been observed. A model has been given to explain the distortion. Some defects (partial dislocation, stacking faults) have been found in nanoclusters.
Ion implantation, Nanocluster composites, High resolution transmission electron microscopy, Distortion, Defects
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【期刊论文】A new type of scanning electron microscope using the coaxial backscattered electrons
蒋昌忠, C.Z. Jiang a, b, *, P. Morin c, N. Rosenberg b
Micron 33(2002)69-74,-0001,():
-1年11月30日
A new coaxial detection system for backscattered electrons in SEM is described. This coaxial detection system allows us to collect only the backscattered electrons that have lost a small percentage of the primary energy, emerging from the sample surface with a take-off angle de
Scanning electron microscope, Backscattered electron, Coaxial detection, Monte Carlo simulation, Backscattering coeffcient, Composition analysis
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【期刊论文】In-situ TEM observation of silver nanocrystals in an Ag-implanted SiO film
蒋昌忠, C.Z. JiangU, X.J. Fan
Surface and Coatings Technology 131(2000)330-333,-0001,():
-1年11月30日
The Ag ions were implanted in an amorphous SiO2 film, which was placed in a sample chamber of TEM. The concentration and size distribution of the Ag nanocrystals as functions of both the ion dose and the annealing temperature were examined in-situ by using this TEM. The selected diffraction pattern determined the Ag nanocrystal's presence and the dark field micrograph showed the shape and the concentration of the Ag nanocrystals. The implantation results demonstrated an average size diminution and a significant concentration increase of the Ag nanocrystals when the dose increased. The annealing results showed a loss of silver at 300℃ and above.
In-situ, Silver nanocrystal, TEM observation
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蒋昌忠, JIANG Chang-Zhong, , p. Morin, N. Rosenberg
CHIN. PHYS. LETT. Vol. 17. No.9 (2000) 637-639,-0001,():
-1年11月30日
A new detection system in scanning electron microscope, which filters in energy and detects the backscattered electrons close to the microscope axis, is described. This technique ameliorates the dependence of the backscat-tering coefficient on atomic number, and suppresses effectively the relief contrast at the same time. Therefore this new method is very suitable to the composition analysis.
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【期刊论文】Monte Carlo simulations of coaxial backscattered electrons in SEM
蒋昌忠, N. Rosenberg*, C.Z. Jiang, P. Morin
Ultramicroscopy 76(1999)97-105,-0001,():
-1年11月30日
We simulate the trajectories of backscattered electrons within a SEM of particular detection geometry which is adapted to topographic contrast attenuation and Z atomic number contrast enhancement. The calculations are performed choosing the different experimentally possible conditions as regards the primary electron energy, the detector aperture angle and the energy window of the detected electrons. From such simulations, it is possible to deduce the backscattering coe
Re
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【期刊论文】Ag-Cu离子注入玻璃后不同气氛退火的光吸收研究
蒋昌忠, 张丽), 蒋昌忠))†, 任峰), 陈海波), 石瑛), 付强))
物理学报,2004,53(9):2910~2914,-0001,():
-1年11月30日
采用MEVVA源(metal vapor vacuum arc ion source)引出的强束流脉冲Ag,Cu离子先后注入到SiO2玻璃,x射线光电子能谱仪(XPS)分析显示Ag,Cu大多仍为金属态,有部分氧化态Cu存在。透射电镜观察分析和光学吸收谱都表明在衬底中形成了纳米合金颗粒。结合有效媒质理论,得到模拟的光学吸收谱,与实验结果基本符合,较好地验证了以上结论。样品退火后颗粒发生分解,分解的颗粒在氧化气氛下被氧化,且有部分向样品表面蒸发;在还原气氛下氧化态元素被还原并成核生长。故可通过改变退火条件对纳米颗粒的成核生长进行调制。
离子注入,, 纳米颗粒,, 退火,, 光学吸收率
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【期刊论文】Ag离子注入非晶SiO2的光学吸收、拉曼谱和透射电镜研究
蒋昌忠, 刘向绯), 蒋昌忠))†, 任峰), 付强))
物理学报,2005,54(10):4363~7364,-0001,():
-1年11月30日
能量为200keV的Ag离子,以1×1016,5×1016,1×1017cm-2的剂量分别注入到非晶SiO2玻璃,光学吸收谱显示:注入剂量为1×1016cm-2的样品的光吸收谱为洛伦兹曲线,与Mie理论模拟的曲线形状一致;注入剂量较大的5×1016,1×1017cm-2的谱线共振吸收增强,峰位红移并出现伴峰。透射电镜观察分析表明,注入剂量不同的样品中形成的纳米颗粒的大小、形状、分布都不同,注入剂量较大的还会产生明显的表面溅射效应,这些因素都会影响共振吸收的峰形、峰位和峰强。当注入剂量达到1×1017cm-2时,Ag纳米颗粒内部可能还形成了杂质团簇。
离子注入,, 纳米颗粒,, 共振吸收,, 红移
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