Paper-supported nanostructured ultrathin gold film electrodes – Characterization and functionalization

Ihalainen, Petri; Määttänen, Anni; Pesonen, Markus; Sjöberg, Pia; Sarfraz, Jawad; Österbacka, Ronald; Peltonen, Jouko

doi:10.1016/j.apsusc.2014.12.156

Cited by 11 publications

(7 citation statements)

References 77 publications

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“…Ihalainen et al have employed cyclic voltammetry to characterize their paper-based ultrathin gold film electrodes modified with inkjet-printed conductive polymer [37].…”

Section: Electrochemical Detection and Its Applicationsmentioning

confidence: 99%

Inkjet-Printed and Paper-Based Electrochemical Sensors

2018

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It is becoming increasingly more important to provide a low-cost point-of-care diagnostic device with the ability to detect and monitor various biological and chemical compounds. Traditional laboratories can be time-consuming and very costly. Through the combination of well-established materials and fabrication methods, it is possible to produce devices that meet the needs of many patients, healthcare and medical professionals, and environmental specialists. Existing research has demonstrated that inkjet-printed and paper-based electrochemical sensors are suitable for this application due to advantages provided by the carefully selected materials and fabrication method. Inkjet printing provides a low cost fabrication method with incredible control over the material deposition process, while paper-based substrates enable pump-free microfluidic devices due to their natural wicking ability. Furthermore, electrochemical sensing is incredibly selective and provides accurate and repeatable quantitative results without expensive measurement equipment. By merging each of these favorable techniques and materials and continuing to innovate, the production of low-cost point-of-care sensors is certainly within reach.

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“…Ihalainen et al have employed cyclic voltammetry to characterize their paper-based ultrathin gold film electrodes modified with inkjet-printed conductive polymer [37].…”

Section: Electrochemical Detection and Its Applicationsmentioning

confidence: 99%

Inkjet-Printed and Paper-Based Electrochemical Sensors

2018

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“…In the case of GE, the larger amount of the deposited gold resulted in partial filling of the voids, hence somewhat fading out the latex nanostructure. Also, the grainy fine-structure of the UTGFE and GE was slightly different and apparently thicknessdependent [5]. Figure 3 shows the XPS survey spectra of the UTGFE (20 nm) and GE (40 nm).…”

Section: Atomic Force Microscopymentioning

confidence: 99%

“…The weak adhesion of ultrathin gold films to commonly used substrate materials, for instance glass and silica, is a challenge. We have earlier demonstrated mechanically stable ultrathin gold films fabricated on a paper substrate [5]. A nanostructured latex-coated paper was used as a substrate for the vacuum deposited ultrathin gold films with varying thickness.…”

Section: Introductionmentioning

confidence: 99%

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Electro-Optical Gas Sensor Consisting of Nanostructured Paper Coating and an Ultrathin Sensing Element

et al. 2019

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This work describes the use of a paper substrate for electro-optical detection of toxic hydrogen sulfide (H2S) gas. For electrical detection, a chemiresistive type of gas sensor was developed. Ultrathin gold film electrodes (UTGFE) were produced by physical vapor deposition of gold on nanostructured latex-coated paper substrate. The gas-sensing film was deposited on the electrodes by inkjet printing. The sensing films were characterized by atomic force microscopy, X-ray photoelectron spectroscopy and conductometry. The sensing films showed more than seven orders of magnitude change in resistance when exposed to as low as 1 part per million (ppm) H2S gas at room temperature. Besides resistive response, the change in color of the sensing films was studied on a paper substrate, both as a function of print density of the sensing material and H2S concentration. For quantification of the analyte the red, green and blue color deconvolution was performed on the pictures of the paper strip indicator using an open source software. A clear response was obtained from the blue channel. The inexpensive disposable color strips produced on the paper substrate can be used for qualitative and quantitative detection (as low as 1.5 ppm) of H2S gas.

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“…On the other hand, although really scarce in the bibliography, deposition methods that produce thinfilms seem to be very convenient for porous substrates. Some works on gold sputtering (Shiroma et al, 2012;Ihalainen et al, 2015), electron-beam evaporation (Carvalhal et al, 2010) or spray-deposition (Siegel et al, 2010) have been reported. Although spray-deposition of metal is inexpensive, it gives features with heterogeneous distribution and low conductivity.…”

Section: Introductionmentioning

confidence: 99%

Integration of gold-sputtered electrofluidic paper on wire-included analytical platforms for glucose biosensing

Núñez-Bajo

Blanco‐López

Costa-Garcı́a

et al. 2017

Biosensors and Bioelectronics

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This work describes the fabrication and evaluation of an electroanalytical paper-based platform based on the combination of both, reusable and disposable materials in order to generate simple, versatile and low-cost microfluidic devices. With this aim, a holder containing metal wires that act as reusable reference and counter electrodes has been developed. The gold-sputtered paper electrode is disposable and easily interchangeable, meanwhile the platform that includes reference and counter electrodes can be reused. The detection zone in the paper is delimited by drawing a hydrophobic line with an inexpensive permanent marker. The effect of experimental variables such as adding solutions through the face where the gold was sputtered (upwards) or through the opposite one (downwards) as well as of other working parameters were studied by cyclic and differential pulse voltammetry with potassium ferrocyanide as a common redox probe and indicator species for enzymatic, immune and DNA biosensing. Enzymatic determination of glucose in real food samples prove the feasibility of the developed system for the construction of electrochemical biosensors.

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Paper-supported nanostructured ultrathin gold film electrodes – Characterization and functionalization

Cited by 11 publications

References 77 publications

Inkjet-Printed and Paper-Based Electrochemical Sensors

Inkjet-Printed and Paper-Based Electrochemical Sensors

Electro-Optical Gas Sensor Consisting of Nanostructured Paper Coating and an Ultrathin Sensing Element

Integration of gold-sputtered electrofluidic paper on wire-included analytical platforms for glucose biosensing

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