Carbon nanotubes–SU8 composite for flexible conductive inkjet printable applications

Mionić, Marijana; Pataky, Kristopher; Gáal, R.; Magrez, Arnaud; Brugger, Juergen; Forró, Lászlø

doi:10.1039/c2jm16547c

Cited by 29 publications

(26 citation statements)

References 29 publications

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“…As had already been mentioned, the major challenge in formulating CNT inks is to obtain a stable dispersion of non-aggregated nanotubes in a proper liquid vehicle, at low viscosity. Since the CNTs are very hydrophobic, three routes for obtaining such dispersions are presented: (a) dispersing the CNTs in organic solvents without dispersing agents, [ 21,24,36,[182][183][184] (b) dispersing the CNTs in an aqueous media using dispersants such as surfactants (anionic, cationic, and nonionic) or polymers, [ 23,24,36,41,[185][186][187][188][189][190] and (c) chemical modifi cation of the CNT with functional groups, which favor the interactions of CNTs with the dispersing medium [ 24,36 ] (for example, to obtain water-dispersible CNTs, nitric acid is usually used to produce oxygen-containing carboxyl, carbonyl, and hydroxyl groups on the surface of a nanotube). [ 191,192 ] The major problem with organic solvents without dispersing agents is the inability to obtain dispersions with high CNTs concentration, more than 0.1 g L −1 .…”

Section: Cnt-based Inksmentioning

confidence: 99%

Conductive Nanomaterials for Printed Electronics

Kamyshny

Magdassi

2014

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762

626

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This is a review on recent developments in the field of conductive nanomaterials and their application in printed electronics, with particular emphasis on inkjet printing of ink formulations based on metal nanoparticles, carbon nanotubes, and graphene sheets. The review describes the basic properties of conductive nanomaterials suitable for printed electronics (metal nanoparticles, carbon nanotubes, and graphene), their stabilization in dispersions, formulations of conductive inks, and obtaining conductive patterns by using various sintering methods. Applications of conductive nanomaterials for electronic devices (transparent electrodes, metallization of solar cells, RFID antennas, TFTs, and light emitting devices) are also briefly reviewed.

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Section: Cnt-based Inksmentioning

confidence: 99%

Conductive Nanomaterials for Printed Electronics

Kamyshny

Magdassi

2014

Small

762

626

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“…In bulk form, these materials typically consist of electrically conducting filler particles dispersed in an insulating matrix. Filler particle 2 materials are diverse and commonly include graphite 4 , carbon black, and metal powders of varying size and shape 5 , and more recently carbon nanotubes 6 and graphene 7,8 . The insulating matrix materials are equally varied, with a range of polymeric materials 9,10,11 and even cement 12 utilized.…”

Section: Introductionmentioning

confidence: 99%

Temperature Dependence of Electrical Transport in a Pressure-Sensitive Nanocomposite

Webb

Bloor

Szablewski

et al. 2014

ACS Appl. Mater. Interfaces

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“…The inclusion of particles in SU8 can be done to impart greater functionality on the final structure, an example of this being the inclusion of SiO 2 particles in an SU8 matrix to increase wear resistance [7]. Carbon nanotubes have also been used as inclusions within a SU8 matrix to make an inkjet-printable conductive composite [8] and SU8 / ZnO nanoparticle composites have been investigated as piezoelectric materials [9].…”

Section: Introductionmentioning

confidence: 99%

Lithographically fabricated SU8 composite structures for wettability control

Hamlett

McHale

Newton

2014

Surface and Coatings Technology

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SU8 is a negative resist which is widely used for the fabrication of micron scale lateral features over a wide range of heights using photolithographic methods. This has been extensively used as a method to produce surface structure to which hydrophobicity can be added and a model super-water repellent surface of achieved. However, such an approach requires at least two-steps and does not embed the desired properties as part of the structure itself or create multiple levels of topographical structure. In other applications, a variety of inclusions have previously been studied to tailor the properties of SU8. In this work we report an approach to, and results from, incorporating inclusions, in our case glass beads, of different wettabilities into the SU8 structures produced by photolithography. In particular, we focus on ridge structures expected to be of use in flow systems as drag reducing surfaces. We used scanning electron microscopy and profilometry to investigate how the inclusion of either hydrophobic or hydrophilic glass beads (sieve size of 20-30 μm) affects the definition of the structures formed and contact angle goniometry to define what effect such inclusions has on the wettability of the SU8 composite structure. It was found that the inclusion of hydrophobic glass beads in the SU8 resist resulted in poorly defined structures compared to both SU8 on its own and SU8 to which hydrophobic glass beads were added. In contrast, inclusion of hydrophilic glass beads resulted in a well-defined ridge structure with the majority of the beads located in the 'valleys'. Both EDX analysis and contact angle data indicated that the surface chemistry of the beads themselves (both the hydrophobic and hydrophilic beads) were masked by the SU8. Counter-intuitively, the inclusion of hydrophobic beads in the SU8 composite resin resulted in ridges with increased wettability, compared to SU8 ridges, as opposed to the inclusions of hydrophilic beads that resulted in surfaces with increased effective hydrophobicity .2

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Carbon nanotubes–SU8 composite for flexible conductive inkjet printable applications

Cited by 29 publications

References 29 publications

Conductive Nanomaterials for Printed Electronics

Conductive Nanomaterials for Printed Electronics

Temperature Dependence of Electrical Transport in a Pressure-Sensitive Nanocomposite

Lithographically fabricated SU8 composite structures for wettability control

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