Maskless functionalization of a carbon nanotube dot array biosensor using an ultrafine atmospheric pressure plasma jet

Abuzairi, Tomy; Okada, Minoru; Mochizuki, Yohei; Poespawati, Nji Raden; Purnamaningsih, Retno Wigajatri; Nagatsu, Masaaki

doi:10.1016/j.carbon.2015.03.015

Cited by 44 publications

(29 citation statements)

References 51 publications

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“…Plasma has been extensively used for surface activation and modification [ 23 , 24 , 25 ]. Reactive plasma species may create active sites or defects, introduce dopants, and graft surface functional groups on materials surfaces [ 12 , 26 , 27 ]. All of these tailor the surface properties and may alter the surface wettability [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

“…Atmospheric-pressure plasma (APP) can be operated in a regular pressure environment without using a vacuum system; this is particularly advantageous for biomedicine and agriculture applications [ 29 , 30 ]. By avoiding the need for a vacuum system, the operation cost of APPs can be reduced, making APP an economical viable tool to perform plasma processing when the samples can tolerate environmental cleanliness conditions [ 4 , 27 , 31 , 32 , 33 ]. Owing to the vigorous interactions of APP reactive species on carbon-based materials, APPs have been extensively used for the rapid processing of carbonaceous materials [ 4 , 7 , 12 , 27 , 31 , 34 , 35 ].…”

Section: Introductionmentioning

confidence: 99%

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Dielectric Barrier Discharge Plasma Jet (DBDjet) Processed Reduced Graphene Oxide/Polypyrrole/Chitosan Nanocomposite Supercapacitors

et al. 2021

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Reduced graphene oxide (rGO) and/or polypyrrole (PPy) are mixed with chitosan (CS) binder materials for screen-printing supercapacitors (SCs) on arc atmospheric-pressure plasma jet (APPJ)-treated carbon cloth. The performance of gel-electrolyte rGO/CS, PPy/CS, and rGO/PPy/CS SCs processed by a dielectric barrier discharge plasma jet (DBDjet) was assessed and compared. DBDjet processing improved the hydrophilicity of these three nanocomposite electrode materials. Electrochemical measurements including electrical impedance spectroscopy (EIS), cyclic voltammetry (CV), and galvanostatic charging-discharging (GCD) were used to evaluate the performance of the three types of SCs. The Trasatti method was used to evaluate the electric-double layer capacitance (EDLC) and pseudocapacitance (PC) of the capacitance. The energy and power density of the three types of SCs were illustrated and compared using Ragone plots. Our experiments verify that, with the same weight of active materials, the combined use of rGO and PPy in SCs can significantly increase the capacitance and improve the operation stability.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dielectric Barrier Discharge Plasma Jet (DBDjet) Processed Reduced Graphene Oxide/Polypyrrole/Chitosan Nanocomposite Supercapacitors

et al. 2021

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“…To control the gas flow rate is critical to obtain a stable plasma discharge in the present APPJ device without any damage of capillary tip. The value of gas flow used in this experiment (~ 700 sccm) was determined from the stable discharge condition of atmospheric pressure plasma jet at appropriate applied voltages [19][20][21]. Currentvoltage waveforms of discharges are measured using a digital oscilloscope (Tektronix, DPO 4104B-L) connected to a high voltage probe (Tektronix, P6015A), and a current probe (Pearson, 4100) on power electrode line.…”

Section: Methodsmentioning

confidence: 99%

Surface Modification of Fluorine-containing Polymers by Atmospheric Pressure Plasma Jet with Negative Substrate Biasing

Nagatsu

Kimpara

et al. 2017

J. Photopol. Sci. Technol.

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Fluoropolymers are difficult materials to modify the surfaces because of strong C-F bonds. In this study, the surface modification of fluoropolymer films such as polytetrafluoroethylene (PTFE) with amino groups was performed by using He/NH 3 gas mixture atmospheric pressure plasma jets with negatively-biased substrate. It is expected that the ion bombardment effect onto the polymer surface due to negative substrate bias will make dangling bonds over the polymer surface and eventually promote the surface modification. From XPS analysis, we confirmed the breaking C-F bonds and creating C-C, C=O or C-N bonds in C 1s spectrum and increasing nitrogen-containing functional groups in N 1s spectrum. Fluorescence patterns were observed on the amino group functionalized PTFE surface by using the fluorescent dyes selectively connecting with the amino groups. With a spectrophotometric method, the surface concentration of amino groups introduced onto the PTFE surface was evaluated to be roughly 3.86 nmol/cm 2 .

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“…Compared with low-pressure microplasma devices such as microdischarges, APPμJs generate room-temperature plasma containing highly reactive species to downstream in open air, which gives them several advantages in direct treatment of hard and soft materials with outstanding flexibility and simplicity. For instance, a tapered air APPμJs produced by pulling quartz microcapillary has been developed for the removal of Parylene-C films [ 16 , 17 ]; in addition, Masaaki Nagatsu and co-workers have developed an APPμJ system based on ultrafine nanopipette nozzle for sub-micron modification and removal of carbon nanotubes and photoresists [ 18 , 19 , 20 ]. Their results are considered as the minimum line width of current APPμJs.…”

Section: Introductionmentioning

confidence: 99%

Separated Type Atmospheric Pressure Plasma Microjets Array for Maskless Microscale Etching

Dai

Zhang

et al. 2017

Micromachines

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Maskless etching approaches such as microdischarges and atmospheric pressure plasma jets (APPJs) have been studied recently. Nonetheless, a simple, long lifetime, and efficient maskless etching method is still a challenge. In this work, a separated type maskless etching system based on atmospheric pressure He/O2 plasma jet and microfabricated Micro Electro Mechanical Systems (MEMS) nozzle have been developed with advantages of simple-structure, flexibility, and parallel processing capacity. The plasma was generated in the glass tube, forming the micron level plasma jet between the nozzle and the surface of polymer. The plasma microjet was capable of removing photoresist without masks since it contains oxygen reactive species verified by spectra measurement. The experimental results illustrated that different features of microholes etched by plasma microjet could be achieved by controlling the distance between the nozzle and the substrate, additive oxygen ratio, and etch time, the result of which is consistent with the analysis result of plasma spectra. In addition, a parallel etching process was also realized by plasma microjets array.

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Maskless functionalization of a carbon nanotube dot array biosensor using an ultrafine atmospheric pressure plasma jet

Cited by 44 publications

References 51 publications

Dielectric Barrier Discharge Plasma Jet (DBDjet) Processed Reduced Graphene Oxide/Polypyrrole/Chitosan Nanocomposite Supercapacitors

Dielectric Barrier Discharge Plasma Jet (DBDjet) Processed Reduced Graphene Oxide/Polypyrrole/Chitosan Nanocomposite Supercapacitors

Surface Modification of Fluorine-containing Polymers by Atmospheric Pressure Plasma Jet with Negative Substrate Biasing

Separated Type Atmospheric Pressure Plasma Microjets Array for Maskless Microscale Etching

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