Nanowire synthesis, templated

X. Yu, Y. Li, and K. Kalantar-zadeh, Synthesis and electrochemical properties of template-based polyanihne nanowires and template-free nanofibril arrays Two potential nanostructures for gas sensors. Sens. Actuators B, 136, 1-7 (2009). 

Zhang, D., Qi, L. Synthesis of mesoporous titania networks consisting of anatase nanowires by templating of bacterial cellulose membranes. Chem. Common. 21, 2735-2737 (2005)... 

Long nanochannels can be used as single molecule sensors in a similar way as nanopores, as has been demonstrated in several recent studies. In addition to the application as single molecule sensors, long nanochannels and their arrays can be used as filters for molecule separation, membranes for electroosmotic pumping, templates for nanowire synthesis, electrodes for supercapacitors, and proton exchange membranes in fuel cells. Novel and complex transport phenomena can occur in nanochannels, leading to improved performance or new functions for devices made of nanochannels. 

D. Zhang, and L. Qi, Synthesis of mesoporous titania networks consisting of anatase nanowires by templating of bacterial cellulose membranes. Chem. Commun. 21,2735-2737 (2005). D. Mullera, C. R. Rambo, L. M. Portoc, W. H. Schreiner, and G. M. O. Barra, Structure and properties of polypyrrole/bacterial cellulose nanocomposites. Carbohydr. Polym. 94, 655-662, (2013). 

Qu, Y., Porter, R., Shan, F., Carter, J. and Guo, T. (2005) Synthesis of tubular gold and silver nanoshells using silica nanowire core templates. Langmuir, 22(14), 5357-74. 

Du N, Xu YF, Zhang H, Yu JX, Zhai CX, Yang DR (2011) Porous ZnCo204 nanowires synthesis via sacrificial templates high-performance anode materials of Li-ion batteries. Inorg Chem 50 3320-3324... 

Zeolites have ordered micropores smaller than 2nm in diameter and are widely used as catalysts and supports in many practical reactions. Some zeolites have solid acidity and show shape-selectivity, which gives crucial effects in the processes of oil refining and petrochemistry. Metal nanoclusters and complexes can be synthesized in zeolites by the ship-in-a-bottle technique (Figure 1) [1,2], and the composite materials have also been applied to catalytic reactions. However, the decline of catalytic activity was often observed due to the diffusion-limitation of substrates or products in the micropores of zeolites. To overcome this drawback, newly developed mesoporous silicas such as FSM-16 [3,4], MCM-41 [5], and SBA-15 [6] have been used as catalyst supports, because they have large pores (2-10 nm) and high surface area (500-1000 m g ) [7,8]. The internal surface of the channels accounts for more than 90% of the surface area of mesoporous silicas. With the help of the new incredible materials, template synthesis of metal nanoclusters inside mesoporous channels is achieved and the nanoclusters give stupendous performances in various applications [9]. In this chapter, nanoclusters include nanoparticles and nanowires, and we focus on the synthesis and catalytic application of noble-metal nanoclusters in mesoporous silicas. 

Similarly, monometallic Rh, Pd, and Au and bimetallic Pt-Rh and Pt-Pd nanowires were prepared in FSM-16 or HMM-1 by the photoreduction method [30,33,34]. The bimetallic wires gave lattice fringes in the HRTEM images, and the EDX analysis indicated the homogeneous composition of the two metals. These results show that the wires are alloys of Pt-Rh and Pt-Pd. Mesoporous silica films were also used as a template for the synthesis of uniform metal particles and wires in the channels [35,36]. Recently, highly ordered Pt nanodot arrays were synthesized in a mesoporous silica thin film with cubic symmetry by the photoreduction method [37]. The... 

Over the past few years, a large number of experimental approaches have been successfully used as routes to synthesize nanorods or nanowires based on titania, such as combining sol-gel processing with electrophoretic deposition,152 spin-on process,153 sol-gel template method,154-157 metalorganic chemical vapor deposition,158-159 anodic oxidative hydrolysis,160 sonochemical synthesis,161 inverse microemulsion method,162 molten salt-assisted and pyrolysis routes163 and hydrothermal synthesis.163-171 We will discuss more in detail the latter preparation, because the advantage of this technique is that nanorods can be obtained in relatively large amounts. 

Mbindyo, J.K.N., Template synthesis of metal nanowires containing monolayer molecular junctions, J. Am. Chem. Soc., 124, 4020,2002. 

The Russell group has applied the template synthesis approach to nanoporous films generated from UV-treated PS-fo-PMMA copolymers [43, 147,233,235,241], which were pre-aligned perpendicular to the substrate by an electric field. Through direct current electrodeposition, they fabricated high-density vertical arrays of ferromagnetic cobalt nanowires (Fig. 10a) [43]. Through subsequent work, they also demonstrated the successful replication... 

Figure 15.1 Ordered nanoscale structures of mesoporous materials such as FSM-16 and HMM-1 (Et-HMM-1) as the silica and organosilica templates for surface-mediated synthesis of metal/alloy nanowires and nanoparticles.

Surface-Mediated Synthesis of Metal/Alloy Nanowires Using Mesoporous Templates... 

Surface-Mediated Synthesis of Metai/AHoy Nanowires Using Mesoporous Templates 603... 

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