Dynamics of percolation phenomena in colloidal printing inks

被引：1

作者：

Daniele, Michael Angelo-Anthony ^{[1
]}

Foguth, Alexandra L. ^{[1
]}

Rungta, Parul ^{[1
]}

Bandera, Iurii ^{[1
]}

Tsyalkovskyy, Volodymyr ^{[1
]}

Foulger, Stephen H. ^{[1
]}

机构：

[1] Clemson Univ, Sch Mat Sci & Engn, Ctr Opt Mat Sci & Engn Technol, Clemson, SC 29634 USA

来源：

ADVANCED FABRICATION TECHNOLOGIES FOR MICRO/NANO OPTICS AND PHOTONICS III | 2010年 / 7591卷

关键词：

colloidal ink; conductive polymer blend; percolation; emulsion; oxadiazole; CONDUCTIVE POLYMER COMPOSITES; FIELD-EFFECT TRANSISTOR; CARBON-BLACK; ELECTRICAL-PROPERTIES; THIN-FILMS; PHASE-SEPARATION; MORPHOLOGY; LATEX; THRESHOLD;

D O I：

10.1117/12.842647

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The conductivity of colloidal inks composed of poly(ethylene glycol) (PEG), 2-(4-tert-Butylphenyl)-5-(4-biphenylyl)-1,3,4- oxadiazole (tPBD) or polystyrene-tPBD copolymerized colloids (PS-PBD) and carbon black (CB) were investigated to establish their percolation characteristics. The PS-PBD colloid supported inks (PEG/PS-PBD/CB) exhibited reduced percolation thresholds and enhanced conductivities above that of the individually carbon filled (PEG/CB) and small molecule blend (PEG/tPBD/CB) inks. Based on the DC conductivity analysis, the percolation threshold of the PEG/PS-PBD/CB composites was 3.6 vol%. The electrical resistivity of the PEG/PS-PBD/CB ink is lower than that of PEG/PBD/CB ink with the same CB content in the percolation region by 8 orders of magnitude. The percolation reduction was attributed to the heterogeneous dispersion of conductive filler aggregates "bridged" by PSPBD colloids. The aggregated dispersion of PS-PBD colloids in the ink matrix was characterized by photoluminescence spectroscopy (PL) which produced a red-shift at high concentrations, signaling the required proximity of PS-PBD colloids to form energy transfer complexes.

引用

页数：9

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