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Skip to Search Results- 6electrochemical anodization
- 2carrier dynamics
- 2photoconductivity
- 1Lorentz force
- 1bottom-up nanofabrication
- 1freestanding membrane
- 2Mohammadpour, Arash
- 2Shankar, Karthik
- 1Askar, Abdelrahman M.
- 1Farsinezhad, Samira
- 1K Shankar
- 1Kar, Piyush
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100-Fold Improvement in Carrier Drift Mobilities in Alkanephosphonate-Passivated Monocrystalline TiO2 Nanowire Arrays
Download2017-01-06
Mohammadpour, Arash, Wiltshire, Benjamin D., Zhang, Yun, Farsinezhad, Samira, Askar, Abdelrahman M., Kisslinger, Ryan, Ren, Yang, Kar, Piyush, Shankar, Karthik
Single crystal rutile titania nanowires grown by solvothermal synthesis are actively being researched for use as electron transporting scaffolds in perovskite solar cells, in low detection limit ultraviolet photodetectors, in photoelectrochemical water-splitting, and in chemiresistive and...
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Distinguishing between deep trapping transients of electrons and holes in TiO2 nanotube arrays using planar microwave resonator sensor
Download2018-05-11
Mohammad H Zarifi, Benjamin Daniel Wiltshire, Najia Mahdi, Karthik Shankar, Mojgan Daneshmand
A large signal direct current (DC) bias and a small signal microwave bias were simultaneously applied to TiO2 nanotube membranes mounted on a planar microwave resonator. The DC bias modulated the electron concentration in the TiO2 nanotubes, and was varied between 0 and 120 V in this study. ...
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Magnetic Field-Assisted Electroless Anodization: TiO2 Nanotube Growth on Discontinuous, Patterned Ti Films
Download2014-06-06
Mohammadpour, Arash, Shankar, Karthik
We present a magnetic field-assisted oxidation and etching process that transforms Ti thin films on arbitrary substrates into self-organized TiO2 nanotube arrays without the direct application of an anodization voltage between the cathode and the Ti film/substrate. In effect, the Ti...
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Reduced Ensemble Plasmon Line Widths and Enhanced Two-Photon Luminescence in Anodically Formed High Surface Area Au–TiO2 3D Nanocomposites
Download2016-11-10
Localized surface plasmon resonances (LSPR) in TiO2 nanorod and nanotube arrays decorated by gold nanoparticles can be exploited to improve photocatalytic activity, enhance non-linear optical coefficients and increase light harvesting in solar cells. However the LSPR typically has a low quality...
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Ultraviolet Sensing Using TiO2 Nanotube Integrated High Resolution Planar Microwave Resonator Device
Download2017-12-25
This paper presents a unique integrated UV light sensing concept and introduces a device with a detection limit of 1.96 nW cm−2. The combination of a high quality factor, microwave planar resonator (Q ~ 50,000) with a semiconducting nanomaterial, enables a revolutionary potential paradigm for...