Hybrid method involving atmospheric plasma treatment and inkjet deposition for the development of conductive patterns on flexible polymers

Fleischman, Michelle S.; Lee, Brandon S.; Rodriguez‐Santiago, Victor; Chhasatia, Viral; Sun, Ying; Pappas, Daphne

doi:10.1016/j.surfcoat.2012.03.062

Cited by 21 publications

(9 citation statements)

References 25 publications

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“…This is a relatively low value when compared to recently reported TIPS single crystals . We attribute this difference to two factors: (i) the high surface roughness of the PEN substrate (which has an Rms, Root Mean Square roughness, in the order of several nanometers), that hinders a full and homogeneous contact of the crystals with the electrodes, and (ii) the still unoptimized printing process, which is not yet able to deliver uniformly oriented crystals, or, very likely, to a combination of these factors.…”

Section: Summary Of the Various Step Heights Observed In The Afm Scanmentioning

confidence: 73%

Direct Inkjet Printing of TIPS‐Pentacene Single Crystals onto Interdigitated Electrodes by Chemical Confinement

Pipan

Bogar

Ciavatti

et al. 2017

Adv Materials Inter

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COMMUNICATION (1 of 8)self-standing crystals, like formation of cracks (even macroscopically invisible ones) and/or bad physical contact with the underlying substrate due to surface irregularity of the latter. Moreover, thanks to several centuries of development in the printing industry (the first reported print by J. Gutenberg is dated around 1450), this technology ensures very low production costs and high throughputs. Among the printing techniques that can be used with OSSCs, a particularly interesting one is inkjet (IJ) printing, which allows to rapidly deposit the desired compound only on selected parts of the substrate, minimizing material losses and increasing the overall process productivity. In the last 15 years, IJ printing of organic semiconductors has been explored, and examples of devices based on IJ-printed organic semiconductors and conductors include transistors, [12,13] organic ligth-emitting diodes (OLEDs), [14,15] different types of sensors, and biosensors. [16][17][18][19] These devices have been mainly realized taking advantage of polymers as the active materials, while in some cases soluble organic small molecules, that form highly polycrystalline thin films, have been used. Recently, some attention has been paid to IJ printing of molecules able to produce OSSCs, but such a growth from a small drop of IJ-deposited solutions is not straightforward. The crystallization mechanism at work in this case is the so-called "slow solvent evaporation," in which the solvent slowly evaporates, creating a supersaturation condition that results in nucleation and subsequent crystal growth. However, when this phenomenon occurs in very small volumes (as in the case of IJ-printed solutions, i.e., in the range of a few microliter to hundreds of microliter), a number of undesired processes can arise, like solution spreading on the substrate, or uncontrolled multiple nucleation or accumulation of material at the edges of the drop (the so-called coffee ring effect). [20] These phenomena, which result in the formation of polycrystalline films, are particularly evident when the drops are deposited onto highly heterogeneous substrates, as for example lithographically defined interdigitated electrodes. Jang and co-worker reported the IJ printing of polycrystalline films of TIPS-pentacene (6,13-bis(triisopropylsilylethynyl)pentacene, from now on TIPS), [21] a high-performing molecular semi conductor that delivers top charge-carrier mobilities exceeding 6 cm 2 V s −1 , [22] but usually in the range of 0.5-1 cm 2 V s −1 . [23,24] Interestingly, Organic semiconducting single crystals (OSSCs) are very promising for lowcost electronics, being the highest performers among organic semiconductors in terms of charge transport, with carrier mobilities exceeding 10 cm 2 V s −1 . Here, it is demonstrated how it is possible to obtain millimeter-long single crystals of 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene) onto gold interdigitated electrodes patterned onto flexible plastic substrates, via direct inkjet printin...

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Section: Summary Of the Various Step Heights Observed In The Afm Scanmentioning

confidence: 73%

Direct Inkjet Printing of TIPS‐Pentacene Single Crystals onto Interdigitated Electrodes by Chemical Confinement

Pipan

Bogar

Ciavatti

et al. 2017

Adv Materials Inter

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“…In addition, the change of the polar component is also greater compared to the dispersion component. These results show that the main contribution to the increase of surface energy is due to the polar component (Fleischman et al, 2012).…”

Section: Contact Angles and Surface Energymentioning

confidence: 64%

Nano-modification of plasma treated inkjet printing fabrics

Zhang

2015

International Journal of Clothing Science and Technology

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Purpose – Inkjet printing is becoming increasingly important and popular for the printing of textiles. As one of the environmentally friendly processes, the plasma has been widely used to modify the surface properties of inkjet printing substrates. The purpose of this paper is to investigate the nano-modification of plasma on polyester fabric for pigment inkjet printing. The actual printing performance and the related mechanical behavior of samples were also evaluated. Design/methodology/approach – Polyester fabrics were surface modified by atmospheric pressure air plasma with the aim to improve its inkjet printing performance. The effects of plasma treatment on surface properties of fabrics were characterized using X-ray photoelectron spectroscopy (XPS) and Scanning electron microscopy (SEM). The wettability of the samples is evaluated by measurement of contact angles of different polar liquids and surface energy. Breaking strength and elongation, bending rigidity are tested to evaluate the mechanical behavior of treated and control fabrics. Findings – It was found that the nano-modification of plasma markedly improved the anti-bleeding property of inkjet printing fabrics. SEM and XPS analyses indicated that this improved color performance was mainly contributed by not only the etching effect and oxygen containing polar groups induced onto fiber surfaces. In addition, the results of mechanical behavior test indicate no evident reduction of breaking strength and breaking elongation both in warp and weft direction after plasma modification. Originality/value – The surface modification method used here offers an economic and dependable way for pretreatment of inkjet printing fabrics with the advantages of environmental friendly over traditional pretreatment methods.

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“…The C to O atomic ratio decreased aer plasma treatment, suggesting the formation of C-O and C]O bonds at the plasma-treated substrate surfaces resulting from oxygenation of PEN and PET as reported in the literature. 4,5,7,43 We reported that the FE-SEM image of surfaces of the PEN and PET substrates before and aer plasma treatment for 5 min shows the formation of brillar patterns (nanobrils) consists of relatively polar low-molecular-weight fragments resulting from the scission of the polymer chain by plasma treatment. 2,6,10,42 These results show that the surfaces of PEN and PET substrates are etched by the oxygen plasma leading to the formation of polymer chains containing hydrophilic groups such as hydroxyls and carboxyls.…”

Section: Resultsmentioning

confidence: 99%

“…For example, plasma treatment and ultraviolet (UV) light irradiation are suitable for modifying surfaces because they can raise the surface energy and increase adhesion. [1][2][3][4][5][6][7][8][9][10][11][12] The surface modication by plasma treatment and UV irradiation proceeds via the chemical reactions of the polymers themselves, resulting in the formation of functional groups that govern surface properties. Functional groups can also be introduced by forming thin layers on polymer surfaces.…”

Section: Introductionmentioning

confidence: 99%

Surface modification of PEN and PET substrates by plasma treatment and layer-by-layer assembly of polyelectrolyte multilayer thin films and their application in electroless deposition

et al. 2017

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Hybrid method involving atmospheric plasma treatment and inkjet deposition for the development of conductive patterns on flexible polymers

Cited by 21 publications

References 25 publications

Direct Inkjet Printing of TIPS‐Pentacene Single Crystals onto Interdigitated Electrodes by Chemical Confinement

Direct Inkjet Printing of TIPS‐Pentacene Single Crystals onto Interdigitated Electrodes by Chemical Confinement

Nano-modification of plasma treated inkjet printing fabrics

Surface modification of PEN and PET substrates by plasma treatment and layer-by-layer assembly of polyelectrolyte multilayer thin films and their application in electroless deposition

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