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Search Publications by: Babak Nikoobakht (Fed)

Displaying 26 - 50 of 54

Two Dimensional (2D) Nanomembranes: Can They Outperform Lower Dimension Nanocrystals?

March 13, 2012

Author(s)

Babak Nikoobakht, Xiuling Li

Inorganic nanomembranes, analogues to graphene, are expected to impact a wide range of device concepts including thin film- or flexible platforms. Size dependent properties and high surface area, two key characteristics of zero- (0D) and one-dimension (1D)

Surface-directed Growth of Nanowires: A Scalable Platform for Nanodevice Fabrication

July 11, 2011

Author(s)

Babak Nikoobakht

Optical lithography continues to be the popular technique for further miniaturization of electronic circuitry and its components. However, as further device miniaturization continues, complexity of pattern generation and cost increase; therefore the use of

One-dimensional p-n heterojunctions of zinc oxide on gallium nitride: A structural characterization

July 1, 2011

Author(s)

Babak Nikoobakht, John E. Bonevich, Andrew A. Herzing

Recently we showed lateral growth of ZnO nanowires and nanowalls on single crystal GaN and formation of bi- and tri-directional assembly of nanowires and nanowalls using a surface-directed vapor-liquid-solid process (SVLS). Taking advantage of this growth

Growth of Planar Arrays of One-dimensional p-n Heterojunctions

September 15, 2010

Author(s)

Babak Nikoobakht, Andrew A. Herzing

We report a general method for /in-situ/ formation and hierarchical assembly of nanowire-based semiconductor heterojunctions that are electrically addressable. Heterojunctions are formed by lateral epitaxial growth of nanowires/nanowalls on a semiconductor

Strained Zinc Oxide Nanowires on Sapphire: Transition From Horizontal to Standing Growth

June 25, 2009

Author(s)

Babak Nikoobakht, Susie Eustis

Our results show that growth of horizontal ZnO nanowires on sapphire a-plane takes place epitaxially with misfit dislocations much fewer than theoretically expected. In highly lattice mismatched systems, misfit dislocation formation is the common route for

Patterns of Ensemble Variation of the Optical Properties of ZnO Nanowires Grown with Copper and Gold Catalysts

March 19, 2009

Author(s)

Susie Eustis, Larry Robins, Babak Nikoobakht

Analysis of the structural and optical properties of gold- and copper-catalyzed zinc oxide (ZnO) nanowires (NWs), grown in a high temperature tube furnace on a sapphire substrate shows non-uniformity over the substrate. The changes in the optical

Analysis of Copper incorporation in Zno Nanowires

January 12, 2009

Author(s)

Susie Eustis, Douglas C. Meier, M R. Beversluis, Babak Nikoobakht

A Scalable Platform for Integrating Horizontal Nanochannels with Known Registries to Microchannels

December 8, 2008

Author(s)

Babak Nikoobakht

A new method for in-situ fabrication of nanochannels is developed which allows adjusting their average pore size to an unprecedented range of 5 nm to 20 nm. It is shown that nanochannels with different but controlled pore sizes are selectively fabricated

Towards Industrial Scale Fabrication of Nanowire-Based Devices

April 11, 2007

Author(s)

Babak Nikoobakht

The key requirements for mass fabrication of nanodevices are directed positioning and alignment of nanoparticles (e.g., nanowires) with known registries on a large scale. Here, these issues are addressed in a high throughput and scalable approach for

Growth Habits and Defects in ZnO Nanowires Grown on GaN/sapphire Substrates

September 5, 2005

Author(s)

A V. Davydov, Babak Nikoobakht, Norman Sanford, Pavel Mogilevsky

Growth habits and defects in ZnO nanowires grown on GaN/sapphire substrates

August 31, 2005

Author(s)

Igor Levin, Albert Davydov, Babak Nikoobakht, Norman Sanford, Pavel Mogilevsky

Growth habits and defects in epitaxial ZnO nanowires grown from Au catalyst on (00.1) GaN/sapphire substrate using the vapor-liquid-solid (VLS) technique were studied using electron microscopy and x-ray diffraction. The results revealed presence of both

Growth Habits and Defects in ZnO Nanowires Grown on GaN/Sapphire Substrates

August 31, 2005

Author(s)

Igor Levin, Albert Davydov, Babak Nikoobakht, Norman A. Sanford, Pavel Mogilevsky

Growth habits and defects in epitaxial ZnO nanowires grown from Au catalyst on (0001) GaN/sapphire substrate using Vapor-Liquid-Solid (VLS) technique were studied using electron microscopy and X-ray diffraction. The results revealed presence of both

Horizontal Growth and In Situ Assembly of Oriented ZnO Nanowires

March 13, 2005

Author(s)

Babak Nikoobakht, Chris A. Michaels, Mark D. Vaudin, Stephan J. Stranick