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Annealing effect of platinum-incorporated nanowires created by focused ion/electron-beam-induced deposition
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Focused ion-beam-induced deposition(FIBID) and focused electron-beam-induced deposition(FEBID) are convenient and useful in nanodevice fabrication. Since the deposition is from the organometallic platinum precursor, the conductive lines directly written by focused ion-beam(FIB) and focused electron-beam(FEB) are carbon-rich materials. We discuss an alternative approach to enhancing the platinum content and improving the conductivity of the conductive leads produced by FIBID and FEBID, namely an annealing treatment. Annealing in pure oxygen at 500?C for 30 min enhances the platinum content values from ~18% to 30% and ~ 50% to 90% of FIBID and FEBID, respectively. Moreover, we find that thin films will be formed in the FIBID and FEBID processes. The annealing treatment is helpful to avoid the current leakage caused by these thin films. A single electron transistor is fabricated by FEBID and the current–voltage curve shows the Coulomb blockade effect. 相似文献
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利用拉曼光谱方法,对柠檬酸钠辅助水热合成纳米结构多孔ZnO微球的机理进行了研究。样品的拉曼光谱特征显示,多孔ZnO微球中存在Zn-柠檬酸配合物;分析表明反应溶液中柠檬酸钠水解产生的柠檬酸根与Zn2+结合形成Zn-柠檬酸配合物,该配合物化学吸附在Zn(OH)2晶核的(204)和(503)晶面,使Zn(OH)2晶核择优生长形成纳米薄片状结构;水热过程中Zn(OH)2微晶团聚形成纳米片状结构多孔Zn(OH)2微球并以沉淀析出。研究发现吸附在薄片表面的Zn-柠檬酸配合物提高了Zn(OH)2微晶的热稳定性,使得Zn(OH)2的分解温度高于200 ℃,加热到300 ℃后Zn(OH)2完全分解获得纳米结构多孔ZnO微球。 相似文献
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以聚环氧乙烷-聚环氧丙烷-聚环氧乙烷(P123)为模板剂,采用共溶胶的蒸发诱导自组装方法制备了氨基功能化介孔SO2薄膜,然后利用氯金酸(HAUCl4)与介孔SiO2薄膜孔道内壁的氨基之间的中和反应组装Au纳米粒子,制备得到Au/SiO2纳米复合材料.用TEM,XRD和UV-Vis光谱对材料进行了测试.结果表明,无水乙醇... 相似文献
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气-液界面有序介孔SiO2无机膜的仿生合成 总被引:2,自引:0,他引:2
早在几百万年以前,自然界就通过生物矿化过程形成了结构高度有序的有机/无机复合材料,如哺乳动物的牙床、骨骼以及贝壳珍珠层等[1]。随着对天然生物材料生物矿化过程研究的逐渐深入,材料研究者从中得到极为重要的启示:先形成有机物自组装体,无机先驱物在自组装聚集体与溶液相的界面处发生化学反应,在有机自组装体的模板作用下,形成有机/无机复合体,再将有机模板去除即可得到具有一定形状与组织结构的无机材料。这种模仿生物矿化中无机物在有机物调制下形成过程的材料合成,称为仿生合成(biomimetic synthesis)[2]。仿生合成过程中,通过选择有… 相似文献
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Mesoporous silica thin films loaded with gold nanoparticles are synthesized in the presence of EO20PO70EO20(P123).Transmission electron microscope images show that the matrix of the nanocomposite is an ordered porous structure with a two-dimensional hexagonal phase.The wide-angle X-ray diffraction pattern implies that the nanocomposite contains gold crystals.These metallic nanoparticleembedded solid thin films show some linear and nonlinear optical properties due to their special structure and composition.Gold nanoparticles bring about surface plasmon resonance,and an absorption peak stemming from this effect has been observed.The linear absorption property is analyzed by a quantum mechanism,and the results show that it is influenced by the size and volume fraction of gold nanoparticles. Furthermore,it shows an obviously clear nonlinear optical property measured by the z-scan technique.The magnitude of the nonlinear refractive index of the nanocomposite is estimated to be about 10? 10 cm 2 /W. 相似文献
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在原子力显微镜的接触扫描模式下,研究了半导体ZnO纳米棒的压电放电特性.采用两步湿化学法制备沿c轴择优生长的ZnO纳米棒阵列;利用镀Pt探针接触扫描ZnO纳米棒获得峰值达120 pA电流脉冲,脉冲持续时间可达30 ms,电流脉冲与纳米棒的形貌存在对应关系.镀Pt探针与ZnO纳米棒接触形成肖特基二极管,I-V特性研究表明放电的ZnO纳米棒压电电势必须大于03 V,以驱动肖特基二极管并输出电流;放电时肖特基二极管的结电阻达吉欧(GΩ)量级,是影响压电电势输出的主要因
关键词:
ZnO
纳米棒
压电放电
肖特基接触 相似文献
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刚性-柔性嵌段共聚物聚苯基喹啉-b-聚乙二醇(PPQ-b-PEG)在选择性溶剂中具有自组装行为. 该共聚物在V (三氟乙酸, TFA)︰V (二氯甲烷, DCM) = 1︰1的混合溶剂中能够自组装成直径为几个微米的聚合物空心球. 空心球尺寸随着PPQ聚合度的增大而增大, 具有单分散性, 溶液浓度对球径没有影响, 浓度过低时, 球的表面出现毛刺. 同时所形成稀溶液的最大吸收波长为378 nm, 最大发射波长为605 nm. 相似文献
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