High-Yield Selective Placement of Carbon Nanotubes on Pre-Patterned Electrodes

Lewenstein, Justin; Burgin, T.; Ribayrol, Aline; Nagahara, Larry A.; Tsui, R.

doi:10.1021/nl015690z

Cited by 75 publications

(66 citation statements)

References 7 publications

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“…As a result, considerable research focuses on developing techniques for depositing and patterning SWNTs from solution, as individuals or aggregates, with well-controlled coverage and alignment. Langmuir-Blodgett techniques [1][2][3][4] and various schemes of deposition from solution [5][6][7][8][9][10][11][12][13][14][15] have been studied extensively. Although these methods exhibit attractive features, they each have some combination of disadvantages, such as low deposition rate, inability to control tube alignment and/or to deposit over large areas, required chemical modification of the SWNTs or substrates, or the need for organic solvents that are incompatible with plastic device components (organic electrodes, semiconductors, or substrates).…”

mentioning

confidence: 99%

In Situ Deposition and Patterning of Single‐Walled Carbon Nanotubes by Laminar Flow and Controlled Flocculation in Microfluidic Channels

et al. 2006

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confidence: 99%

In Situ Deposition and Patterning of Single‐Walled Carbon Nanotubes by Laminar Flow and Controlled Flocculation in Microfluidic Channels

et al. 2006

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“…[25][26][27] The affinity of semiconductor single-walled carbon nanotubes (SWCNT) towards basic nitrogen atoms is well-known. [28][29][30] As reported by Rouse,31 poly(4-vinylpyridine) (P4VP) performs well the role of bridge between CNT and solvent and hence is able to disperse them in alcoholic medium. P4VP was used by Vos and co-workers 32 to obtain stable suspensions of SWCNT or multi-walled carbon nanotube (MWCNT) with P4VP-based metallopolymers containing [M(bpy) 2 Cl]Cl, where M is Ru 2+ or Os 2+ and bpy is 2,2'-bipyridine.…”

Section: Introductionmentioning

confidence: 75%

“…[28][29][30] In order to check which interaction is dominant in P4VP/MWCNT pair, nuclear magnetic resonance experiments were conducted to investigate the effect of the presence of MWCNT on the chemical shifts of hydrogens and nitrogens of the polymer. shielded showing that, in the average, nitrogen does not donate electronic density to MWCNT walls and therefore charge-transfer interactions could be of minor importance.…”

Section: Resultsmentioning

confidence: 99%

Supramolecular Approach to Decorate Multi-Walled Carbon Nanotubes with Negatively Charged Iron(II) Complexes

Jannuzzi¹,

Martins²,

Huamaní³

et al. 2016

Journal of the Brazilian Chemical Society

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Poly(4-vinylpyridine) (P4VP) and P4VP/pentacyanoferrate(II) metallopolymer were used to suspend up to 1 mg mL -1 of multi-walled carbon nanotubes (MWCNT) in ethanol/water mixtures, providing noncolavent decoration of MWCNT with electroactive iron complex. The major interaction between polymer side chains and nanotubes is via π-π stacking, rather than chargetransfer interaction reported for many nitrogenated interacting molecules. Preservation of structural integrity of the nanotubes after functionalization was attested by Raman, which was reflected in the semiconducting character of the dried nanocomposites. Proximity of pentacyanoferrate(II) to MWCNT walls was suggested by its solvatochromic shift of metal-to-ligand charge transfer band attributed to [Fe(CN) 5 ] 3− bound to P4VP pyridyl moieties. Electronic microscopy revealed smooth films and good adhesion between MWCNT bundles and the matrix. The procedure described herein can be used to combine unique properties of transition metal compounds able to coordinate to pyridyl groups, with the film-forming ability of P4VP and conductivity provided by MWCNT. Keywords: metallopolymer, carbon nanotube decoration, pentacyanoferrate IntroductionCarbon nanotubes (CNTs) are one of the most studied objects in the field of materials science due to their interesting electrical, thermal and mechanical properties. 1 Decoration of CNTs with coordination compounds can be achieved by covalent bonding using different reactions, leading to functionalization with, e.g., porphyrins, 2,3 phthalocyanines, 4,5 bipyridine, 6 terpyridine, 7,8 and catechol 9 complexes. Chemical modification of CNT surface is frequently performed by fluorination or by strong oxidizing agents, so that polar functional groups can be created to allow dispersion in solvents and subsequent bond formation with anchoring groups. [10][11][12] This method usually creates defects in the CNT lattice, lowering its electrical and thermal conductivity and compromising its mechanical properties. 13 To overcome this drawback, some groups explored noncovalent functionalization through van der Waals forces with pyrene derivatives, 14-16 surfactants, 17 and also with standard Werner-type complexes. 18 After functionalization (of both kinds), the material can be processed as a dispersion in some common solvent, which allows its application for different purposes, as production of printed electrodes 19 and phenolic resin nanocomposite, 17 for example. The association of CNTs with polymers provides films with enhanced electrical conductivity and superior mechanical performance provided that hydrophobic polymer chains can overcome van der Waals interactions that sustain CNTs together in bundles. [20][21][22][23][24] Wrapping molecules can bind onto CNT outermost surface through other non-covalent interaction like acid-base adduct formation, also known as charge-transfer interaction.13 This kind of strategy has been used to build very stable decorated CNTs with different transition metal compounds. [25][26][27] The af...

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“…This technique can be useful for positioning nanotube but has very poor directional control as the nanotubes often loop around the patterns. Several applications of this method to position nanotubes in between pairs of electrodes have been reported and only limited rate of reliable electrical contact of the device can be assured [10]. Huang et al reported on fluidic manipulation, utilizing flow assembly on a functionalized substrate.…”

Section: Introductionmentioning

confidence: 99%