Patterned Growth of TiO<sub>2</sub>Nanowires on Titanium Substrates

Ha, Jong-Yoon; Sosnowchik, Brian D.; Liu, Lin; Kang, Dong Heon; Davydov, Albert V.

doi:10.1143/apex.4.065002

Cited by 14 publications

(15 citation statements)

References 21 publications

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“…Fabrication of semiconductor and oxide nanowires typically uses dewetting of a low melting point metal catalyst where the resulting clusters set the feature size while epitaxy to the underlying substrate can control the growth orientation. 5,[35][36][37] More recently, an electrochemical electrolyte-liquid-solid analog has been demonstrated for growth of Ge nanowires. [38][39][40] In another approach nanowire growth of metallic nanostructures capitalizes on the intrinsic or additive engineered anisotropic energetics and/or growth kinetics on different crystal facets.…”

mentioning

confidence: 99%

Morphological Transitions during Au Electrodeposition: From Porous Films to Compact Films and Nanowires

Josell

Levin

Moffat

2015

J. Electrochem. Soc.

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Gold electrodeposition was studied in a sulfite electrolyte to which micromolar concentrations of Tl 2 SO 4 were added. Hysteresis and a regime of negative differential resistance (NDR) evident in electroanalytical measurements are correlated with deposit morphology and interpreted through measurements of thallium underpotential deposition (upd). Deposit morphologies range from specular surfaces to highly faceted dendrite-like grains of moderate aspect ratio and, for potentials within the NDR region, sub-50 nm diameter, high aspect ratio 110 oriented single crystal nanowires. The nanowires exhibit an epitaxial relationship to the substrate that permits one step fabrication of surfaces densely covered with high aspect ratio nanowires having controlled orientations. The NDR and nanowires are a consequence of the non-monotonic relationship between Tl coverage and growth velocity; at low coverage Tl accelerates Au deposition while at higher coverage it inhibits deposition. Immiscibility of the Tl and Au supports on-going surface segregation during area expansion that accompanies nanowire growth leading to greater dilution of the additive coverage and more rapid growth at the nanowire tips, while the sidewalls remain passivated by a saturated Tl coverage. Interest in nanostructures is driven by the unique properties associated with high surface area to volume materials that express quantum or mesoscale phenomena of importance to diverse subjects ranging from biology and medicine 1-3 to optics and energy conversion. [4][5][6][7] Of particular interest is the substantial literature on solution or vapor processing to yield a wide variety of nanostructures including high aspect ratio nanowires. 4,8,9 Solution-based, chemical reduction processes are attractive because they are inexpensive and scalable.9-18 Subsequent processing involving particle packing and/or substrate interactions can lead to higher order organization and colloidal crystals.19 Alternatively, nanostructures can be grown on or in surfaces that have been shaped by lithography or other means to obtain control of orientation and/or placement.8 Electrochemical processing may involve throughmask plating in patterned templates 20,21 or superconformal electrodeposition of metals and alloys [22][23][24][25][26][27][28][29][30][31] including gold 32-34 in high aspect ratio features. However, these processes require nanoscale patterned topography to create such structures and the associated patterning often comes with increased processing complexity.Controlled anisotropic growth and orientation, if not position, is possible through vapor-liquid-solid (VLS) growth processes. Fabrication of semiconductor and oxide nanowires typically uses dewetting of a low melting point metal catalyst where the resulting clusters set the feature size while epitaxy to the underlying substrate can control the growth orientation. 5,[35][36][37] More recently, an electrochemical electrolyte-liquid-solid analog has been demonstrated for growth of Ge nanowires. [38][39][40] In another ap...

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confidence: 99%

Morphological Transitions during Au Electrodeposition: From Porous Films to Compact Films and Nanowires

Josell

Levin

Moffat

2015

J. Electrochem. Soc.

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“…It is due to the thickness of Ti layer we deposited. According to the result of Ha et al, they got 3∼8 μm long TiO2 nanowires on Ti layer [17]. They used Ti foil and deposited Ti thin film as sufficient source of nanowire growth.…”

Section: Resultsmentioning

confidence: 99%

“…There are previous studies of nanowire growth using Vapor-Liquid-Solid (VLS) process with metal catalyst [13][14][15][16][17][18][19][20]. Generally, it is reported that TiO2 nanowire grows at 800∼900 o C using VLS process.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of TiO₂Nanowires Using Vapor-Liquid-Solid Process for the Osseointegration

Yun¹,

Kang²,

Yun³

et al. 2013

Journal of the Korean Vacuum Society

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In order to improve osseointegration for biomedical implants, it is crucial to understand the interactions between nanostructured surfaces and cells. In this study, TiO 2 nanowires were prepared via Vapor-Liquid-Solid (VLS) process with Sn as a metal catalyst in the tube furnace. Nanowires were grown with N 2 heat treatment with their size controlled by the agglomeration of Sn layers in various thicknesses. MC3T3-E1 (pre-osteoblast) were cultured on the TiO 2 nanowires for a week. Preliminary results of the cell culture showed that the cells adhere well on the TiO 2 nanowires.

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“…For example, ZnO nanowires have been grown from an anodic alumina membrane (AAM) by combining with a vapour deposition process [103,104].…”

Section: Vapour Deposition Growth Of 1d Nanostructuresmentioning

confidence: 99%

Strategies for designing metal oxide nanostructures

2016

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There has been exponential growth in research activities on nanomaterials and nanotechnology for applications in emerging technologies and sustainable energy in the past decade. The properties of nanomaterials have been found to vary in terms of their shapes, sizes, and number of nanoscale dimensions, which have also further boosted the performance of nanomaterial-based electronic, catalytic, and sustainable energy conversion and storage devices. This reveals the importance and, indeed, the linchpin role of nanomaterial synthesis for current nanotechnology and high-performance functional devices. In this review, we provide an overview of the synthesis strategies for designing metal oxide nanomaterials in zerodimensional (0D), one-dimensional (1D), two-dimensional (2D), and three-dimensional (3D) forms, particularly of the selected typical metal oxides TiO2, SnO2 and ZnO. The pros and cons of the typical synthetic methods and experimental protocols are reviewed and outlined. This comprehensive review gives a broad overview of the synthetic strategies for designing "property-on-demand" metal oxide nanostructures to further advance current nanoscience and nanotechnology.

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Patterned Growth of TiO₂Nanowires on Titanium Substrates

Cited by 14 publications

References 21 publications

Morphological Transitions during Au Electrodeposition: From Porous Films to Compact Films and Nanowires

Morphological Transitions during Au Electrodeposition: From Porous Films to Compact Films and Nanowires

Fabrication of TiO₂Nanowires Using Vapor-Liquid-Solid Process for the Osseointegration

Strategies for designing metal oxide nanostructures

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Patterned Growth of TiO2Nanowires on Titanium Substrates

Cited by 14 publications

References 21 publications

Morphological Transitions during Au Electrodeposition: From Porous Films to Compact Films and Nanowires

Morphological Transitions during Au Electrodeposition: From Porous Films to Compact Films and Nanowires

Fabrication of TiO2Nanowires Using Vapor-Liquid-Solid Process for the Osseointegration

Strategies for designing metal oxide nanostructures

Contact Info

Product

Resources

About

Patterned Growth of TiO₂Nanowires on Titanium Substrates

Fabrication of TiO₂Nanowires Using Vapor-Liquid-Solid Process for the Osseointegration