溶液浸润模板法制备图案化ABS纳米管阵列

采用紫外光刻技术首先制备了图案化的阳极氧化铝(AAO)模板,以此作为"二次模板",以不同浓度的ABS溶液浸润模板,成功地制备了不同结构的ABS纳米管阵列。用扫描电镜(SEM)对其微观形貌进行表征,结果显示,所获得的ABS纳米管阵列排列规整,高度有序,与掩膜的图案完全一致。并且讨论了溶液浓度对纳米管壁厚的影响。     

图案化金属铜纳米线阵列的制备与表征

采用紫外线光刻技术与电化学沉积相结合的方法,成功制备了不同图案的铜纳米线阵列:一种是圆形图案;另一种是QDU图案.首先利用紫外线光刻技术在多孔阳极氧化铝模板(AAO)生成预设图案,以此作为"二次模板";再利用电化学方法将铜纳米线沉积到"二次模板"的开孔中.扫描电镜(SEM)测试结果表明,大面积、高规整的铜纳米线图案阵列各自独立地立在基底上, 同时,用电子能谱(EDS)分析了铜纳米线的化学成分.透射电镜(TEM)也探测到了铜纳米线的微结构.     

模板浸润法制备聚合物纳米管阵列

以孔径为200nm的多孔氧化铝膜（AAO）为模板、常规分子量的通用聚合物为原料,采用聚合物溶液或熔体浸润模板纳米孔的物理技术,进行了多种聚合物纳米管的制备研究。结果表明：聚苯乙烯、尼龙66、聚丙烯、ABS、热塑性聚氨酯等多种聚合物纳米管及其纳米管阵列成功制得。运用扫描电子显微镜（SEM）和透射电子显微镜（TEM）观察了纳米管的微观形貌和阵列结构。并探讨了聚合物性质、纳米管制备工艺与纳米管结构的关系,初步探索了多孔模板法制备聚合物纳米管的机理。     

模板浸润法制备可生物降解聚合物纳米管和纳米线

以孔径为200nm的阳极氧化铝（AAO）为模板，用简单的物理方法制备了生物可降解聚合物聚己内酯（PCL）的纳米管、线及其阵列结构。SEM和TEM测试结果表明：熔融法在120℃和140℃都能制得整齐的纳米管阵列结构，管径均匀，约300nm。在溶液法中，5％浓度的溶液制得了杂乱的纳米管，而10％浓度的溶液制得的是纳米线阵列，直径在200nm左右。     

图案化ZnO纳米线阵列制备与应用的研究进展

综述了多种图案化制备ZnO纳米线阵列的技术,包括电子束光刻技术、纳米球蚀刻技术、激光干涉光刻技术、纳米压印技术和嵌段共聚物蚀刻技术等。介绍了图案化ZnO纳米线阵列在传感器、太阳能电池和UV检测器等功能器件中的应用进展,分析了图案化ZnO纳米线阵列制备与应用中的优点、意义及存在的问题,并展望了其未来发展趋势。     

溶胶凝胶模板法制备钴铁氧体纳米线、纳米管

利用溶胶凝胶模板方法,通过控制不同的退火工艺成功制备出平均直径约40 nm的CoFe2O4纳米线和纳米管,振动样品磁强计(VSM)测试结果表明样品的矫顽力随退火速度的增加而降低.     

恒流法制备图案化的阳极氧化铝模板

采用紫外线光刻技术在铝片上生成预设图案,用恒流二次氧化法在图案化的铝片上生长AAO,以此模板制备了PS和Cu纳米线阵列.采用扫描电子显微镜(SEM)分析.结果表明,制备的图案是直径5μm的圆形组成,圆形图案中·心之间距离是10μm,每个圆中生长了均匀的AAO,孔径大约为60～80nm.     

聚苯乙烯一维纳米阵列的图案化

采用紫外线光刻技术在阳极氧化铝模板(AAO)上生成预设图案,用物理浸润的方法在图案化的模板上生长聚苯乙烯,最后用NaOH和磷铬酸溶液分别溶解模板.采用扫描电子显微镜(SEM)和电子能谱(EDS)分析.结果表明,制备的图案是直径5μm的圆形组成,圆形图案中心之间距离是10μm,每个圆中长满一维纳米阵列,其纳米特性没有变化.     

用AAO模板法制备硅纳米管

先用二步阳极氧化法制备纳米孔平均孔径约为100 nm的Al/Al_2O_3(AAO)模板,再以AAO为模板用溶胶-凝胶法合成管径约为60-80 nm的硅纳米管,并用扫描电镜和透射电镜观察了硅纳米管的形貌。结果表明,AAO模板的孔径分别随着二步阳极氧化法中电解温度、氧化电压、硫酸和草酸混酸浓度的增大而增大,硅纳米管的形成与硅烷溶胶的嵌入方法、凝胶形成时间和温度有较大的关系。     

模板法制备DyCoxZnyOz纳米管阵列及磁性研究

采用减压抽滤法在多孔阳极氧化铝模板（AAM）纳米孔道中构筑DyCo_xZn_yO_z纳米管阵列,采用扫描电镜（SEM）和透射电镜（TEM）观察DyCo_xZn_yO_z纳米管阵列和单根纳米管形貌,用选区电子衍射（SAED）、X-射线衍射（XRD）及能量色散谱（EDS）表征纳米管的结构和元素组成,结果表明,DyCoxZnyOz纳米管为非晶态结构,纳米管元素组成的原子百分比Dy：Co：Zn：O为4.86：1.67：1.70：91.77,质量百分比Dy：Co：Zn：O为32：4.42：4.07：59.51。以振动样品磁强计（VSM）研究了DyCo_xZn_yO_z纳米管阵列磁性能,实验结果表明,DyCo_xZn_yO_z纳米管阵列易磁化方向为垂直于纳米管阵列方向,磁各向异性源于形状各向异性,DyCo_xZn_yO_z纳米管阵列具备软磁体特征。     

Fabrication of patterned surfaces by photolithographic exposure of DNA hairpins carrying a novel photolabile group

This article demonstrates a method for the fabrication of patterned surfaces using hairpin oligonucleotides carrying a novel photolabile group at the apex of the loop. Photolysis of surfaces carrying photolabile hairpin oligonucleotides results in the formation of areas carrying single-stranded DNA sequences that direct the deposition of the complementary sequence at the photolysed sites. The non-photolysed areas carrying the intact hairpin do not bind to complementary sequences due to the presence of the more stable intramolecular hairpin duplex. The photolithographic process was performed on silicon wafers and followed by atomic force microscopy and epi-fluorescent microscopy. The method described offers an attractive option for the fabrication of biologically interfaced patterned surfaces with specific recognition properties with potential uses in electronics and as biosensors.     

Fabrication of microfluidic devices containing patterned microwell arrays

A rapid fabrication and prototyping technique to incorporate microwell arrays with sub-10 μm features within a single layer of microfluidic circuitry is presented. Typically, the construction of devices that incorporate very small architecture within larger components has required the assembly of multiple elements to form a working device. Rapid, facile production of a working device using only a single layer of molded polydimethylsiloxane (PDMS) and a glass support substrate is achieved with the reported fabrication technique. A combination of conventional wet-chemical etching for larger (≥20 μm) microchannel features and focused ion beam (FIB) milling for smaller (≤10 μm) microwell features was used to fabricate a monolithic glass master mold. PDMS/glass hybrid chips were then produced using simple molding and oxygen plasma bonding methods. Microwell structures were loaded with 3 μm antibody-functionalized dye-encoded polystyrene spheres, and a sandwich immunoassay for common cytokines was performed to demonstrate proof-of-principle. Potential applications for this device include highly parallel multiplexed sandwich immunoassays, DNA/RNA hybridization analyses, and enzyme linked immunosorbent assay (ELISA). The fabrication technique described can be used for rapid prototyping of devices wherever submicrometer- to micrometer-sized features are incorporated into a microfluidic device.     

Fabrication of magnetic nanodot arrays for patterned magnetic recording media

Fabrication processes of arrayed magnetic nanodots for the use of patterned magnetic recording media were reviewed. One candidate for the patterned media is ordered assemble of magnetic nanoparticles, and the other is patterned magnetic thin films fabricated using various micro/nano scale machining processes. For the formation of patterned masks and molds, lithography processes as well as self-organized pattern formation are utilized. For the deposition processes of magnetic dots, electrochemical deposition processes were widely used. These fabrication processes are reviewed mainly from recent reports. The recording systems for the patterned media including probe-type-recording are also overviewed.     

Fabrication of patterned multicomponent protein gradients and gradient arrays using microfluidic depletion

We demonstrate that depletion effects in the fluids used to fill a poly(dimethylsiloxane) microfluidic device can be used in conjunction with its design rules to generate patterned protein gradients. The linear portions of these structures can be designed to present gradients of bound protein coverage-varying from near-saturation to effectively zero-over distances ranging from a few hundred micrometers to more than 1 cm by design. Such patterns can be developed in a simple, single-channel form as well as in a multichannel gradient array of more complex design. The patterning protocols also support the use of multiple protein sources, and we demonstrate an assembly process mediated by a protein that inhibits adsorption to generate a gradient array in pixel form. We describe examples of multiple protein gradient patterns along with simple immunoassays to illustrate the scope of the methodology, the activity of the patterned proteins, and their recognition in gradient form on a surface. These gradients should prove useful to studies in biosensor and bioassay development and as substrates for cell culture to study growth and motility.     

Fabrication of nanostructure on a polymer film using atomic force microscope

SPM based lithographic techniques have been developed to pattern various substrates such as metals, semiconductors, and organic/polymer films due to its simplicity and high spatial precision nanostructure. Fabrication of nanostructure using polymeric materials is a key technique for the development of nanodevices. Here, we report the fabrication of nanostructures from polyacrylicacid (PAA) and polymethacrylicacid (PMAA) film on a silicon substrate using atomic force microscope (AFM). The formation of the nanopattern from the polymer film was studied using electrostatic nanolithography and the optimization of the conditions for nanopatterning of the polymer film was investigated with respect to the applied potential and translational speed of the AFM tip. The nanostructure of size 28 nm was created using the biased AFM tip on the PMAA film coated on Si(100) substrate and found that this method is a direct and reliable method to produce uniform nanostructures on a polymer film.     

Fabrication and actuation of ionic polymer metal composites patterned by combining electroplating with electroless plating

The novel fabrication technique that patterns the multiple electrodes of the ionic polymer metal composite actuators was developed to mimic the swimming and flapping locomotion of a living thing. The developed method is to combine electroplating with the electroless chemical reduction using the patterned mask. The advantages of this fabrication method are that the initial compositing between the polymer and platinum particles can be assured by the chemical reduction method, and the thickness of each electrode can be controlled easily and rapidly by electroplating. By using the fabricated actuator with a multiple degree of freedom, the oscillatory and undulatory waves of the flexible membrane actuator was generated and a twisting motion was also realized to verify the possibility of mimicking the fish-like locomotion. Present results show that this novel method combining electroplating with electroless plating can be a promising technique to easily pattern multiple electrodes and to implement the biomimetic motion of the polymer actuators with good mechanical bending performance.     

Self-assembled one-dimensional nanostructure arrays

A range of proposed devices relies on the electronic, optical or magnetic properties of one-dimensional (1D) chains of nanoparticles. Here, well-controlled 1D arrays have been formed by templating a spherical-morphology block copolymer within a narrow groove. Significantly, the domains are distorted into ellipses with aspect ratio and major axis orientation controlled by the groove width. This technique gives unprecedented control over the period, particle size, aspect ratio, and orientation of nanoparticles in 1D arrays, making it valuable for creating self-assembled masks for the fabrication of novel devices.