Dielectrophoretic alignment of metal and metal oxide nanowires and nanotubes: A universal set of parameters for bridging prepatterned microelectrodes

Maijenburg, A. Wouter; Maas, M.G.; Rodijk, E.J.B.; Ahmed, Waqqar; Kooij, Ernst S.; Carlen, Edwin T.; Blank, Dave H.A.; Elshof, Johan E. ten

doi:10.1016/j.jcis.2010.12.011

Cited by 46 publications

(49 citation statements)

References 33 publications

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Section: Guiding Nanowire Deposition By Dielectrophoresismentioning

confidence: 99%

“…The resulting force can be readily calculated for the case of a prolate ellipsoid: it is proportional to the gradient of the electrostatic energy following the law where we introduced the Clausius---Massotti factors 21 , α=L,S (3) The form factors depend on the eccentricity e of the ellipsoid and attain two different values when the field is oriented along the long (L) or short (S) axes. Our NWs have a length which is ≈20 times the diameter; we can thus estimate , leading 21 to and . The positive or negative sign of determines whether the particle is attracted (positive DEP) or repelled (negative DEP) from regions with large E. Since our DEP protocol was performed using isopropyl alcohol ( and negligible conductivity ) as the medium and highly---doped InAs NWs as the ``particle'ʹ'ʹ ( and sizable conductivity ), deposition is expected to work already at rather low frequencies 27 .…”

Section: Guiding Nanowire Deposition By Dielectrophoresismentioning

confidence: 99%

“…Since we use a very small inter---electrode gap, the substrate is largely screened. As a consequence, it is not expected to have an important effect and can be left floating 21 . Optimal results were obtained by applying an AC voltage in the range 0.75 ---1.20V and a frequency of 1---10kHz, while frequencies Hz were found to be less effective 21---23 .…”

Section: Guiding Nanowire Deposition By Dielectrophoresismentioning

confidence: 99%

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Suspended InAs nanowire Josephson junctions assembled via dielectrophoresis

Montemurro¹,

Stornaiuolo²,

Massarotti³

et al. 2015

Nanotechnology

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We present a novel technique for the realization of suspended Josephson junctions based on InAs semiconductor nanowires. The devices are assembled using a technique of drop-casting guided by dielectrophoresis that allows to finely align the nanostructures on top of the electrodes. The proposed architecture removes the interaction between the nanowire and the substrate which is known to influence disorder and the orientation of the Rashba vector. The relevance of this approach in view of the implementation of Josephson junctions based on HighTemperature Superconductors is discussed. INTRODUCTION.Hybrid devices based on low---dimensional materials coupled to superconducting (SC) electrodes emerged in the last years as an ideal platform for the investigation unconventional quantum effects. In these devices the macroscopic quantum correlations typical of SCs can be induced via proximity effect in a wide class of low---dimensional materials such as graphene 1,2 and semiconducting nanowires (NWs) 3---7 that offer a unique degree of freedom in the design and control of quantum states 8---11 . The most intriguing opportunity offered by these material combinations is the possibility to drive novel excitations and properties that none of the individual device components originally possessed. Recently, this possibility was at the base of the proposal to obtain Majorana---like excitations in semiconducting NWs 11---15 , where pairing correlations can be combined with Rashba spin---orbit coupling 15---18 . Hybrid NWs---SC Josephson junctions are typically obtained by transferring NWs to a Si/SiO2 substrate, on top of which device electrodes are nanofabricated by aligned e---beam lithography. Future advancements in the field and a better understanding of the exotic excitations induced in NW---SC hybrid structures will also depend on the possibility to realize devices having complex architectures, such as systems comprising several NWs connected in a controlled way 19 . Moreover, in these hybrid devices the NW---to---substrate interaction is known to play an important role in terms of induced disorder and by the breaking of inversion symmetry in the electrostatic environment in which the nanostructure is embedded. This is believed to lead to a pinning of the Rashba vector within the plane of the host Si substrate 20 . In this letter we demonstrate a rapid and effective method to realize NW---based suspended Josephson junctions where nanostructure positioning is obtained by dielectrophoresis (DEP) on previously patterned electrodes 21---23 . In our devices, single NWs are aligned on electrode pairs separated by nanogaps approx. , corresponding to a dimension which is over one order of magnitude smaller than the NW length. This is an unusual and challenging DEP configuration and we discuss a novel geometry for achieving a good deposition in this regime. We also show that the properties of the hybrid devices realized using this method are comparable with those of conventional non---suspended devices. We believe that ou...

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Section: Guiding Nanowire Deposition By Dielectrophoresismentioning

confidence: 99%

Section: Guiding Nanowire Deposition By Dielectrophoresismentioning

confidence: 99%

Section: Guiding Nanowire Deposition By Dielectrophoresismentioning

confidence: 99%

See 1 more Smart Citation

Suspended InAs nanowire Josephson junctions assembled via dielectrophoresis

Montemurro¹,

Stornaiuolo²,

Massarotti³

et al. 2015

Nanotechnology

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“…49 For applications where site-specific location and orientation of nanostructures is required, such as electronic circuits and sensors, global magnetic alignment in conjunction with other methods for locating the nanowires onto specified positions on a device structure can assist in the orientation of nanowires. Such positioning techniques include chemical bonding via biochemical functionalization, 37,50 localized electric field assisted alignment, 26,29,30 and localized magnetic field gradients. 39 For applications of nanowires in sensors, such as for biotechnology applications, 26 where nanostructures need to make contact between electrodes, but the precise orientation of the nanowires is not significant, then magnetic alignment would be beneficial.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, a variety of techniques have been utilised to manipulate and control electrodeposited nanowires suspended in a solvent including thermocapillary motion of nanowire suspensions in microchannels, 25,26 electrostatics, [26][27][28] electric field, 26,29,30 and magnetic field [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45] assisted alignment. Recently, magnetic field have been utilized by several researchers to control assembly and alignment of carbon nanotubes, 26,40 Ni, [31][32][33][34][35] semiconductor, 26 conductive polymer 26 nanowires, as well as metallic nanowires such as gold, 37,39 bismuth, 42 coppertin, 41 Pt, 43 and ZnO (Ref.…”

Section: Introductionmentioning

confidence: 99%

Magnetic field alignment of template released ferromagnetic nanowires

Sultan

Das

Mandal

et al. 2012

Journal of Applied Physics

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A detailed investigation of magnetic field alignment of template released ferromagnetic nanowires has been undertaken. The distributions of magnetic field induced angular alignments of Ni0.8Fe0.2, Co, and Ni nanowires grown by electro-deposition and deposited onto substrates from a dilute suspension have been investigated as a function of magnetic field strengths up to ∼1 kOe. The nominal diameter of the nanowires investigated is either ∼200 nm (Ni0.8Fe0.2) or ∼300 nm (Co and Ni). The percentage of nanowires aligned within 0°–10° and 0°–20° of the applied field axis is observed to increase rapidly with increasing field strength up to ∼200 Oe, followed by a slower increase in alignment for the Ni0.8Fe0.2 and Ni wires and little improvement in alignment for the Co wires at higher fields. The proportion of aligned wires within 0°–20° is found to reach ∼82% for Ni0.8Fe0.2, ∼71% for Ni and only 53% for the Co nanowires using a magnetic field of 1 kOe. The influence of wire length upon the efficacy of magnetic alignment is investigated using Ni0.8Fe0.2 and Ni nanowires; this showed that the fractional alignment improved for longer nanowires.

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Field‐Switchable Broadband Polarizer Based on Reconfigurable Nanowire Assemblies

Boehm

Kang

Werner

et al. 2016

Adv Funct Materials

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This article is protected by copyright. All rights reserved. 2Reconfigurability is one of the most critical properties of nanophotonic systems and, consequently, methods for enabling a significant degree of functionality are highly sought after.However, dynamically responsive control in top-down fabricated photonic structures often requires extreme conditions and yields moderate modulation capability. In sharp contrast to top-down methods, directed self-assembly of micro-and nanoparticles offers a distinct avenue for reconfigurable photonics. In the present work, gold nanowire lattices are formed via electric field directed assembly in order to take advantage of their collective optical properties. The lattices are reconfigured on-demand between two different functional states, in the form of broadband polarizers. By selectively switching the electric field between two orthogonal electrode pairs, a maximum transmission contrast of ca. 50% is observed in the near-infrared regime. Moreover, the reconfigurable transmission spectra, which are highly dependent on the nanowire size and electric field conditions, are reversible. The demonstrated proof-of-concept nanowire lattice polarizer provides potential for electrically reconfigurable photonic devices such as ultra-compact polarization components, electro-optic switches, and on-chip modulators. electric field directed assembly of gold nanowires to form reconfigurable 2D lattices and present a tunable broadband polarizer in a proof-of-concept demonstration.

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Dielectrophoretic alignment of metal and metal oxide nanowires and nanotubes: A universal set of parameters for bridging prepatterned microelectrodes

Cited by 46 publications

References 33 publications

Suspended InAs nanowire Josephson junctions assembled via dielectrophoresis

Suspended InAs nanowire Josephson junctions assembled via dielectrophoresis

Magnetic field alignment of template released ferromagnetic nanowires

Field‐Switchable Broadband Polarizer Based on Reconfigurable Nanowire Assemblies

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