scholarly journals Direct Patterning of a Carbon Nanotube Thin Layer on a Stretchable Substrate

Micromachines ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 530 ◽  
Author(s):  
Eunji Lee ◽  
Hye Jin Kim ◽  
Yejin Park ◽  
Seungjun Lee ◽  
Sae Youn Lee ◽  
...  

Solution-based direct patterning on an elastomer substrate with meniscus-dragging deposition (MDD) enables fabrication of very thin carbon nanotube (CNT) layers in the nanometer scale (80–330 nm). To fabricate the CNT pattern with CNT solution, contact angle, electrical variation, mechanical stress, and surface cracks of elastomer substrate were analyzed to identify the optimal conditions of O2 treatment (treatment for 30 s with RF power of 50 W in O2 atmosphere of 50 sccm) and mixture ratio between Ecoflex and polydimethylsiloxane (PDMS) (Ecoflex:PDMS = 5:1). The type of mask for patterning of the CNT layer was determined through quantitative analysis for sharpness and uniformity of the fabricated CNT pattern. Through these optimization processes, the CNT pattern was produced on the elastomer substrate with selected mask (30 μm thick oriented polypropylene). The thickness of CNT pattern was also controlled to have hundreds nanometer and 500 μm wide rectangular and circular shapes were demonstrated. Furthermore, the change in the current and resistance of the CNT layer according to the applied strain on the elastomer substrate was analyzed. Our results demonstrated the potential of the MDD method for direct CNT patterning with high uniformity and the possibility to fabricate a stretchable sensor.

2009 ◽  
Vol 1173 ◽  
Author(s):  
Hidetoshi Matsumoto ◽  
Kenichi Suzuki ◽  
Kazuma Tsuboi ◽  
Mie Minagawa ◽  
Akihiko Tanioka ◽  
...  

AbstractThermal-stable, conductive, and flexible carbon fabric (CF), which is composed of thin carbon fibers prepared by electrospinning, was used for the substrate of carbon nanotube (CNT) field emitter arrays. The field emitter arrays were prepared by chemical vapor deposition (CVD). The current density-electric field characteristics revealed that the CNT field emitter arrays on CF produced a higher current density at a lower turn-on voltage compared to ones on a Si substrate. This emitter integrated with a gate electrode based on hierarchy-structured carbon materials, CNTs on CF, can be used for light sources, displays, and other electronic devices.


2000 ◽  
Vol 636 ◽  
Author(s):  
Robert M. Metzger ◽  
Ming Sun ◽  
Giovanni Zangari ◽  
Mohammad Shamsuzzoha

AbstractWe report nanometer-scale ordered arrays of cylindrical magnetic nanoparticles with low aspect ratio and ultra-high uniformity. Protracted anodization provides hexagonally ordered nanopores in amorphous Al2O3. For instance, pulsed electrochemical deposition grows Co particles of uniform length from the bottoms of these pores: these particles are polycrystalline and randomly oriented. The magnetism of the array is dominated by particle shape and by inter-particle magnetostatic interactions. A very clear transition of the anisotropy from perpendicular to in-plane is observed at a height to radius ratio of about 2. This pulse-reverse electrodeposition shows great promise for a reliable synthesis of uniform nanostructures of many metals.


2016 ◽  
Vol 4 (22) ◽  
pp. 4912-4919 ◽  
Author(s):  
Yong Jin Jeong ◽  
Xinlin Lee ◽  
Jaehyun Bae ◽  
Jaeyoung Jang ◽  
Sang Woo Joo ◽  
...  

Conductive MWCNT/PSS composites have been directly patterned via electrohydrodynamic printing for application as source/drain electrodes in organic field-effect transistors.


2020 ◽  
Vol 21 ◽  
pp. 100409 ◽  
Author(s):  
Changle Xu ◽  
Jingna Zhao ◽  
Zhuo Chao ◽  
Jiaojiao Wang ◽  
Wenlou Wang ◽  
...  

NANO ◽  
2016 ◽  
Vol 11 (05) ◽  
pp. 1650060 ◽  
Author(s):  
Yanyan Deng ◽  
Min Zhang ◽  
Fang Yuan ◽  
Zigang Li ◽  
Wenyu Zhou

Uniformity is a key parameter to assure the accuracy of biosensor devices. In this work, highly uniform carbon nanotube thin-film transistors (CNT-TFTs) with a standard deviation of threshold voltage ([Formula: see text]) as small as 0.04 were achieved by accurately controlling the fabrication process, which is so far the most stable distribution to our knowledge. On-state current ([Formula: see text]), off-state current and on/off current ratio also exhibit high uniformity with low standard deviation of 0.50, 0.72 and 0.54, respectively. Given the high uniformity, high stability and high sensitivity, the CNT-TFTs are used as ultra-sensitive 5-hydroxymethyl cytosine (5-hmC) detecting devices for the first time, which is one of the important modified bases in DNA and plays an important role in epigenetics. After attachment of 5-hmC DNA, a reproducible and stable shift of 18.7–59% in [Formula: see text] as well as a 31–54% change in [Formula: see text] were observed in the transfer characteristics curves of CNT-TFTs. Thus, a detecting device of 5-hmC in DNA segments could be designed based on the highly uniform CNT-TFTs.


2011 ◽  
Vol 3 (4) ◽  
pp. 451-457 ◽  
Author(s):  
Lei Pei ◽  
Jonathan Abbott ◽  
Kyle Zufelt ◽  
Andrew Davis ◽  
Mike Zappe ◽  
...  

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