Processing and characterization of GaP nanowires encapsulated into a PDMS large-scale membrane for flexible optoelectronics

Abstract This paper presents the methods of fabricating arrays of semiconductor III-V nanowires transferred into a flexible polydimethylsiloxane membrane. Molecular beam epitaxy was used to synthesize GaP nanowires. The synthesized nanowire arrays were encapsulated into a silicone membrane by a heavy load swinging-bucket centrifuge. For optoelectronic applications, the nanowire/polydimethylsiloxane membranes were contacted with single-walled carbon nanotubes, peeled from the substrate, then the second carbon nanotubes contact was formed. For optical experiments, the nanowire/polydimethylsiloxane membranes were bonded to supporting polydimethylsiloxane films by oxygen plasma treatment, and then easily released from the substrate by unsticking. The obtained membranes have a high practical potential in flexible optoelectronics.

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Light-emitting p-i-n GaP/GaPAs NW encapsulated in a flexible PDMS membrane

Journal of Physics Conference Series ◽

10.1088/1742-6596/2103/1/012178 ◽

2021 ◽

Vol 2103 (1) ◽

pp. 012178

Author(s):

S M Mukhangali ◽

V Neplokh ◽

F M Kochetkov ◽

E I Moiseev ◽

A S Miroshnichenko ◽

...

Keyword(s):

Carbon Nanotubes ◽

Molecular Beam ◽

Silicone Membrane ◽

Razor Blade ◽

Light Emitting ◽

Flexible Polymer ◽

Coating Method ◽

Technological Stage ◽

Walled Carbon Nanotubes ◽

Silicone Membranes

Abstract Our work is aimed at the method of fabricating arrays of semiconductor III-V NWs transferred into a flexible polymer membrane made of polydimethylsiloxane. GaP/GaPAs NWs with an axial p-i-n structure were synthesized by molecular beam epitaxy. The synthesized NW arrays on substrates were encapsulated into a silicone membrane by the G-coating method in a swinging-bucket centrifuge. After membranes were treated in a plasma mixture of O2/CF2 gases to open the NWs tops, which ensured the application of conductive transparent contacts - single-walled carbon nanotubes obtained by aerosol chemical method. At the last technological stage, the membranes were separated from substrates by peeling with a razor blade and the second carbon nanotubes contact was formed. The obtained LED NW/silicone membranes were characterized by I-V and the electroluminescence spectroscopy measurements.

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Covalent Atomic Bridges Enable Unidirectional Enhancement of Electronic Transport in Aligned Carbon Nanotubes

10.26434/chemrxiv.8044616 ◽

2019 ◽

Author(s):

Mingguang Chen ◽

Wangxiang Li ◽

Anshuman Kumar ◽

Guanghui Li ◽

Mikhail Itkis ◽

...

Keyword(s):

Carbon Nanotubes ◽

Electrical Transport ◽

Large Scale ◽

The Novel ◽

Electrical Measurements ◽

Metal Atoms ◽

Aligned Carbon Nanotubes ◽

Transport Channels ◽

Walled Carbon Nanotubes ◽

Bulk Structures

<p>Interconnecting the surfaces of nanomaterials without compromising their outstanding mechanical, thermal, and electronic properties is critical in the design of advanced bulk structures that still preserve the novel properties of their nanoscale constituents. As such, bridging the p-conjugated carbon surfaces of single-walled carbon nanotubes (SWNTs) has special implications in next-generation electronics. This study presents a rational path towards improvement of the electrical transport in aligned semiconducting SWNT films by deposition of metal atoms. The formation of conducting Cr-mediated pathways between the parallel SWNTs increases the transverse (intertube) conductance, while having negligible effect on the parallel (intratube) transport. In contrast, doping with Li has a predominant effect on the intratube electrical transport of aligned SWNT films. Large-scale first-principles calculations of electrical transport on aligned SWNTs show good agreement with the experimental electrical measurements and provide insight into the changes that different metal atoms exert on the density of states near the Fermi level of the SWNTs and the formation of transport channels. </p>

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Thermoelectric Properties of Thin Films from Sorted Single-Walled Carbon Nanotubes

Materials ◽

10.3390/ma13173808 ◽

2020 ◽

Vol 13 (17) ◽

pp. 3808 ◽

Cited By ~ 3

Author(s):

Blazej Podlesny ◽

Bogumila Kumanek ◽

Angana Borah ◽

Ryohei Yamaguchi ◽

Tomohiro Shiraki ◽

...

Keyword(s):

Carbon Nanotubes ◽

Thermoelectric Properties ◽

Large Scale ◽

Single Walled Carbon Nanotubes ◽

Parent Material ◽

Free Standing ◽

Two Phase ◽

Single Walled Carbon ◽

Walled Carbon Nanotubes ◽

Aqueous Two Phase Extraction

Single-walled carbon nanotubes (SWCNTs) remain one of the most promising materials of our times. One of the goals is to implement semiconducting and metallic SWCNTs in photonics and microelectronics, respectively. In this work, we demonstrated how such materials could be obtained from the parent material by using the aqueous two-phase extraction method (ATPE) at a large scale. We also developed a dedicated process on how to harvest the SWCNTs from the polymer matrices used to form the biphasic system. The technique is beneficial as it isolates SWCNTs with high purity while simultaneously maintaining their surface intact. To validate the utility of the metallic and semiconducting SWCNTs obtained this way, we transformed them into thin free-standing films and characterized their thermoelectric properties.

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Electrochemical sensor based on Prussian blue/multi-walled carbon nanotubes functionalized polypyrrole nanowire arrays for hydrogen peroxide and microRNA detection

Microchimica Acta ◽

10.1007/s00604-020-04673-1 ◽

2021 ◽

Vol 188 (1) ◽

Author(s):

Lili Yang ◽

Jiasheng Wang ◽

Haitao Lü ◽

Ni Hui

Keyword(s):

Carbon Nanotubes ◽

Hydrogen Peroxide ◽

Electrochemical Sensor ◽

Prussian Blue ◽

Nanowire Arrays ◽

Microrna Detection ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

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Large-Scale Production of Single-Walled Carbon Nanotubes Using Ultrafast Pulses from a Free Electron Laser

Nano Letters ◽

10.1021/nl025515y ◽

2002 ◽

Vol 2 (6) ◽

pp. 561-566 ◽

Cited By ~ 62

Author(s):

P. C. Eklund ◽

B. K. Pradhan ◽

U. J. Kim ◽

Q. Xiong ◽

J. E. Fischer ◽

...

Keyword(s):

Carbon Nanotubes ◽

Free Electron ◽

Free Electron Laser ◽

Large Scale ◽

Single Walled Carbon Nanotubes ◽

Scale Production ◽

Single Walled Carbon ◽

Large Scale Production ◽

Ultrafast Pulses ◽

Walled Carbon Nanotubes

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Structure Controlled Synthesis of Vertically Aligned Carbon Nanotubes Using Thermal Chemical Vapor Deposition Process

Journal of Heat Transfer ◽

10.1115/1.4002443 ◽

2010 ◽

Vol 133 (3) ◽

Cited By ~ 12

Author(s):

Myung Gwan Hahm ◽

Young-Kyun Kwon ◽

Ahmed Busnaina ◽

Yung Joon Jung

Keyword(s):

Carbon Nanotubes ◽

Chemical Vapor Deposition ◽

Vapor Deposition ◽

Large Scale ◽

Chemical Vapor ◽

Controlled Synthesis ◽

Full Potential ◽

Thermal Chemical Vapor Deposition ◽

Vertically Aligned ◽

Walled Carbon Nanotubes

Due to their unique one-dimensional nanostructure along with excellent mechanical, electrical, and optical properties, carbon nanotubes (CNTs) become a promising material for diverse nanotechnology applications. However, large-scale and structure controlled synthesis of CNTs still have many difficulties due to the lack of understanding of the fundamental growth mechanism of CNTs, as well as the difficulty of controlling atomic-scale physical and chemical reactions during the nanotube growth process. Especially, controlling the number of graphene wall, diameter, and chirality of CNTs are the most important issues that need to be solved to harness the full potential of CNTs. Here we report the large-scale selective synthesis of vertically aligned single walled carbon nanotubes (SWNTs) and double walled carbon nanotubes (DWNTs) by controlling the size of catalyst nanoparticles in the highly effective oxygen assisted thermal chemical vapor deposition (CVD) process. We also demonstrate a simple but powerful strategy for synthesizing ultrahigh density and diameter selected vertically aligned SWNTs through the precise control of carbon flow during a thermal CVD process.

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