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Synthesis and Characterization of Aluminum/Carbon Nanotubes Composites： Study of Interfacial Interaction

Journal of Chemistry and Chemical Engineering 2013年第4期7卷 313-318页

作者： mananna barbeno Pasquale Barone Valentino Pingitore Assunta Bonanno Mariano Davoli FangXu Physics Department University of Calabria Rende (CS) 87036 Italy Earth Science Department University of Calabria Rende (CS) 87036 Italy

In this work, the authors present a study of growth and characterization of composite based on Al and CNT (carbon nanotubes. The composites were prepared by a chemical mixing method and characterized by SEM analysis, energy dispersed X-ray measurements, X-ray photoelectron spectroscopy and cathodoluminescence spectroscopy. The analysis showed that the composites are formed by macro-cluster of aluminum oxide on a network of CNT without formation of chemical bonds at interface between particles. The results are compared with those obtained for a sample of CNT with Al traces (< 0.5%). They show that only the presence of metal traces changes the nanotubes optical properties, with a luminescence signal centered at about 380 nm. These luminescence signals are caused by the adhesion between CNT and Al micro-clusters that promote the formation of band gap with some local energy levels.

关键词：碳纳米管复合材料界面相互作用铝颗粒表征 X射线光电子能谱合成发光光谱 SEM分析

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Effect of Laser Ablation Cleaning Process on Ceramic Artifacts

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Journal of Physical Science and Application 2013年第4期3卷 224-228页

作者： mananna barbeno Pasquale Barone Fabio Stranges Diana Renzelli Fang Xu Assunta Bonanno Physics Department University of Calabria via Bueci 31 C 87036 Rende (cs) Italy Biology Ecolgy and Earth Science Department University of Calabria via Bucci 4B 87036 Rende (cs) Italy

In this work, the results of a study of laser ablation cleaning process on ceramic artifacts are presented. The experiments were conducted on a "Carosello", a structural hollow element made of clay, placed in arches, in domes or even in the walls of buildings such as churches and houses. Our results show that laser ablation techniques is able to remove the surface impurity patina from artifacts surface without changes the chemical composition and the optical properties of ceramic. Moreover, because the laser cleaning heats only locally the surface of the sample, this method don"t preclude the possibility to apply on artifact the thermo-luminescence dating process.

关键词：激光烧蚀陶瓷清洗工艺表面杂质房屋建筑物热释光测年清洗过程结构元素

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Optical and Structural Properties of Carbon Nanotube-Rutile Heterostructures

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Journal of Chemistry and Chemical Engineering 2012年第10期6卷 942-950页

作者： Marianna barbeno Pasquale Barone Alessandra Imbrogno Fang Xu Valentino Pingitore Assunta Bonanno Physics Department University of Calabria Arcavacata 87036 Italy

The paper presents a study of the growth and characterization of carbon nanotube–rutile nanocomposites. The heterostructures were obtained with a chemical mixing method. Scanning electron microscope images show that the samples appear as a homogeneous powder of rutile with carbon nanotubes intercalated in interspaces between the TiO2 grains. Characterization by both X-ray photoelectron spectroscopy and cathodo-luminescence analysis show the formation of CO-Ti chemical bonds with a decrease of 0.8 eV in the band gap compared to pure rutile. The consequence of this band gap modification is a strong change in optical properties. Luminescence emission is drastically reduced and absorption in the visible range is increased of about 6% at very low concentration (1%) of carbon nanotubes.

关键词：金红石型碳纳米管异质结构光学性质结构特性 X-射线光电子能谱二氧化钛颗粒扫描电子显微镜

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