Fabrication and characterization of DNA-functionalized GaN nanowires

Simpkins, Blake S.; McCoy, Kendra; Whitman, L. J.; Pehrsson, Pehr E.

doi:10.1088/0957-4484/18/35/355301

Cited by 34 publications

(23 citation statements)

References 32 publications

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“…5,6 For their subsequent high-density integration and chip processing, both position and size of these structures have to be controlled during growth. For this purpose, selective area growth (SAG) on patterned substrates has been widely applied.…”

Section: Introductionmentioning

confidence: 99%

Growth kinetics and mass transport mechanisms of GaN columns by selective area metal organic vapor phase epitaxy

Wang

Hartmann

Mandl

et al. 2014

Journal of Applied Physics

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Articles you may be interested inReal-time x-ray studies of crystal growth modes during metal-organic vapor phase epitaxy of GaN on c-and mplane single crystals Appl. Phys. Lett. 105, 051602 (2014); 10.1063/1.4892349Surface diffusion and layer morphology of ( ( 11 2 ¯ 2 ) ) GaN grown by metal-organic vapor phase epitaxyIn situ spectroscopic ellipsometry study of GaN nucleation layer growth and annealing on sapphire in metalorganic vapor-phase epitaxy J. Appl. Phys. 98, 033522 (2005);Three-dimensional GaN columns recently have attracted a lot of attention as the potential basis for core-shell light emitting diodes for future solid state lighting. In this study, the fundamental insights into growth kinetics and mass transport mechanisms of N-polar GaN columns during selective area metal organic vapor phase epitaxy on patterned SiO x /sapphire templates are systematically investigated using various pitch of apertures, growth time, and silane flow. Species impingement fluxes on the top surface of columns J top and on their sidewall J sw , as well as, the diffusion flux from the substrate J sub contribute to the growth of the GaN columns. The vertical and lateral growth rates devoted by J top , J sw and J sub are estimated quantitatively. The diffusion length of species on the SiO x mask surface k sub as well as on the sidewall surfaces of the 3D columns k sw are determined. The influences of silane on the growth kinetics are discussed. A growth model is developed for this selective area metal organic vapor phase epitaxy processing. V C 2014 AIP Publishing LLC. [http://dx.

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Section: Introductionmentioning

confidence: 99%

Growth kinetics and mass transport mechanisms of GaN columns by selective area metal organic vapor phase epitaxy

Wang

Hartmann

Mandl

et al. 2014

Journal of Applied Physics

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“…Williams et al (2014) demonstrated a solution based functionalization method for the specific and selective attachment of streptavidin protein to GaN NWs. Simpkins et al (2007) used both planer GaN substrates and individual GaN NWs to functionalize with ss-DNA. Streptavidin was immobilized on the 3-aminopropyltriethoxysilane (APTES) functionalized NWs.…”

Section: Gallium Nitride Nws-based Fet Biosensorsmentioning

confidence: 99%

Recent advances in nanowires-based field-effect transistors for biological sensor applications

Ahmad

Mahmoudi

Ahn

et al. 2018

Biosensors and Bioelectronics

136

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Nanowires (NWs)-based field-effect transistors (FETs) have attracted considerable interest to develop innovative biosensors using NWs of different materials (i.e. semiconductors, polymers, etc.). NWs-based FETs provide significant advantages over the other bulk or non-NWs nanomaterials-based FETs. As the building blocks for FET-based biosensors, one-dimensional NWs offer excellent surface-to-volume ratio and are more suitable and sensitive for sensing applications. During the past decade, FET-based biosensors are smartly designed and used due to their great specificity, sensitivity, and high selectivity. Additionally, they have the advantage of low weight, low cost of mass production, small size and compatible with commercial planar processes for large-scale circuitry. In this respect, we summarize the recent advances of NWs-based FET biosensors for different biomolecule detection i.e. glucose, cholesterol, uric acid, urea, hormone, proteins, nucleotide, biomarkers, etc. A comparative sensing performance, present challenges, and future prospects of NWs-based FET biosensors are discussed in detail.

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“…There are various reports on the immobilization, positioning, alignment, and assembly of DNA bundles [22][23][24], nanowires [25][26][27][28][29], nanorods [30,31], and carbon nanotubes [32,33], mainly for circuit and sensory functions. Among the few reports in recent years on DEP of colloidal particles, with all dimensions in the submicrometer range, are the DEP capture of virus particles using a probe array with nanoscale tips [34], the optically induced dielectrophoretic trapping and subsequent assembly into arrays of gold nanoparticles [35], the use of DEP in conjunction with hydrodynamic forces to enhance nanoparticle transfer for rapid biosensing [36], and DEP enhancement of protein detection in a silicon-nanowire biosensor [37].…”

Section: Dep Of Colloidal Particlesmentioning

confidence: 99%

Continuous separation of colloidal particles using dielectrophoresis

2013

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Continuous separation of colloidal particles using dielectrophoresisDielectrophoresis is the movement of particles in nonuniform electric fields and has been of interest for application to manipulation and separation at and below the microscale. This technique has the advantages of being noninvasive, nondestructive, and noncontact, with the movement of particle achieved by means of electric fields generated by miniaturized electrodes and microfluidic systems. Although the majority of applications have been above the microscale, there is increasing interest in application to colloidal particles around a micron and smaller. This paper begins with a review of colloidal and nanoscale dielectrophoresis with specific attention paid to separation applications. An innovative design of integrated microelectrode array and its application to flow-through, continuous separation of colloidal particles is then presented. The details of the angled chevron microelectrode array and the test microfluidic system are then discussed. The variation in device operation with applied signal voltage is presented and discussed in terms of separation efficiency, demonstrating 99.9% separation of a mixture of colloidal latex spheres. Keywords:Colloidal / Dielectrophoresis / Separation DOI 10.1002/elps.2012004661 Introduction GeneralDielectrophoresis (DEP) is the motion arising from the interaction of nonuniform electric fields and the induced electrical dipole in polarizable particles [1][2][3][4][5]. The standard electrical technique of electrophoretic separation works when suspended charged particles migrate under the influence of applied electric field. DEP has distinct advantages over this technique in that it can separate neutral particles as well, allowing the separation of particles without having to physiologically alter them; which gives minimum particle handling and no damage. DEP also typically uses microfabricated electrodes to generate highly nonuniform electric fields, which allows it to be performed locally, whereas electrophoretic separation is generally a long-range effect acting between two large external electrodes. Due to the requirements for microfabrication, the localized nature of DEP, and the rapid growth of microfluidic Labon-a-Chip systems or TAS in the past two decades in both research and commercial sectors [6][7][8], there has been a recent growth in the application of DEP to these areas. The first practical application of Lab-on-a-Chip was in fact on-chip CE [9] and with recent advances in the synthesis and the charCorrespondence: Dr. Nicolas Green, Nano Group, School of Electronics and Computer Science, University of Southampton, Highfield, Southampton, SO17 1BJ, UK E-mail: ng2@ecs.soton.ac.uk Fax: +44-2380593029 acterization of size-selected particles in the submicron and nanometer (colloidal) range, an investigation of their physical and chemical properties is now possible [10]. The capability to produce small scale devices allows the development of entirely novel experiments and chip-based analytical system...

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Fabrication and characterization of DNA-functionalized GaN nanowires

Cited by 34 publications

References 32 publications

Growth kinetics and mass transport mechanisms of GaN columns by selective area metal organic vapor phase epitaxy

Growth kinetics and mass transport mechanisms of GaN columns by selective area metal organic vapor phase epitaxy

Recent advances in nanowires-based field-effect transistors for biological sensor applications

Continuous separation of colloidal particles using dielectrophoresis

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