Disposable copper random microarray sensor using toner masks: Fabrication and application

Souza, Ana Paula Ruas de; Felix, Fabiana S.; Dantas, Luiza Maria Ferreira; Angnes, Lúcio; Bertotti, Mauro

doi:10.1016/j.snb.2014.06.068

Cited by 7 publications

(11 citation statements)

References 34 publications

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“…The electrochemical cell was constructed using a CO 2 laser engraving machine L-Solution 100 (Gravograph Industry International, La Chapelle-St Luc, France) to machine Plexiglass plates, as previously described. 31 SECM experiments were performed using a Sensolytics SECM workstation (Sensolytics, Bochum -Germany) and a conventional electrochemical cell: a Pt microelectrode (r ¼ 10 mm), a Ag/AgCl KClsat reference electrode and a platinum wire as the auxiliary electrode. The Pt microelectrode tip was fabricated by sealing a 10 mm diameter Pt wire (Goodfellow -UK) inside a borosilicate glass capillary and then pulling the tip end using a P-97 Flaming/Brown Micropipette Puller (Sutter Instrument Company -USA).…”

Section: Instrumentation and Gold Random Microarray Fabricationmentioning

confidence: 99%

“…The gold random microarray (GRM) was fabricated by using two toner masks which were heat-transferred to a gold surface, similar to the procedure previously described. 31 Briey, the layout of the mask layers was drawn using a graphical soware CorelDraw X5 (Corel, Ottawa, Canada), which was printed using a HP LaserJet (P2015) on waxed papers (support for adhesive labels). 31 Disposable gold surfaces were obtained from recordable compact discs (CD-Rs), as already reported.…”

Section: Instrumentation and Gold Random Microarray Fabricationmentioning

confidence: 99%

“…31 Briey, the layout of the mask layers was drawn using a graphical soware CorelDraw X5 (Corel, Ottawa, Canada), which was printed using a HP LaserJet (P2015) on waxed papers (support for adhesive labels). 31 Disposable gold surfaces were obtained from recordable compact discs (CD-Rs), as already reported. 33,34…”

Section: Instrumentation and Gold Random Microarray Fabricationmentioning

confidence: 99%

“…The use of heat-transferring laser-printed toner masks on different substrates to fabricate MEAs in a random form was reported by Richter et al 30 and recently by our group using copper as a substrate. 31 Now we report the use of gold surfaces to fabricate a new platform for the sensitive quantication of ciclopirox olamine in pharmaceutical products. In addition, gold was chosen as the metallic surface because of its high electrical conductivity and good electrochemical stability.…”

Section: Introductionmentioning

confidence: 99%

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Gold random microarrays: design, characterization and amperometric determination of ciclopirox olamine in pharmaceutical products

et al. 2016

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Section: Instrumentation and Gold Random Microarray Fabricationmentioning

confidence: 99%

Section: Instrumentation and Gold Random Microarray Fabricationmentioning

confidence: 99%

Section: Instrumentation and Gold Random Microarray Fabricationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Gold random microarrays: design, characterization and amperometric determination of ciclopirox olamine in pharmaceutical products

et al. 2016

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“…Recent publications have also demonstrated the use of LPT to produce tunable hydrophobic valves 17 as well as polyester-toner devices for microdroplets generation 18 and reciprocating mixers. 19 Additional examples regarded to the indirect use of toner for the fabrication of electroanalytical devices, [20][21][22][23][24][25] microchip free-flow electrophoresis, 26 polymer microfluidic devices [27][28][29] and integrated microfluidic cell devices have been also reported. 30 Due to the advantages associated with the fabrication simplicity and low cost per device, some authors have extended the use of LPT to produce toner-based devices for clinical assays involving the use of portable equipment like cell phone camera, scanner, digital camera and handheld optical microscope for colorimetric measurements.…”

Section: Introductionmentioning

confidence: 99%

Colorimetric Detection of Glucose in Biological Fluids Using Toner-Based Microzone Plates

Silva

Oliveira

Coltro

2016

Journal of the Brazilian Chemical Society

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This report describes the use of toner-based microzone plates for quantitative determination of glucose in artificial urine and human serum samples using colorimetric detection. The proposed approach has exhibited a linear response for glucose concentration levels from 0 to 10 mmol L , respectively. The glucose analysis in artificial serum samples revealed error lower than 5% in comparison with certified values provided by the supplier. Lastly, the proposed approach has also provided suitable accuracy (92-105%) for glucose measurements in artificial urine samples. Keywords: bioanalytic, clinical assay, disposable device, point-of-care testing, portable instrumentation IntroductionIn the last years, the miniaturization of analytical systems has received considerable attention due to their attractive advantages including low reagent and sample consumption, portability, minimal waste generation, short time analysis, and high-throughput capability. [1][2][3][4][5][6][7] Standard photolithography is one of the main microfabrication technologies allowing the fabrication of microfluidic channels on different platforms including glass, silicon and quartz. Although this technology provides excellent resolution, it is laborious, expensive and time consuming. 8,9 Furthermore, cleanroom facilities and sophisticated instrumentation are required thereby limiting the access to few research groups. For this reason, simpler, cheaper and faster technologies have been developed to promote the rapid spread of miniaturized analytical systems worldwide. [10][11][12] Among the alternative fabrication methodologies, tonerbased techniques offer simplicity and low instrumental requirements, thus making possible their implementation in any laboratory or research center. 13,14 Toner was firstly explored for microfabrication in 2001, when Tan et al. 15 suggested the use of a photocopying machine to create a high-relief master for prototyping of microfluidic devices in poly(dimetilsyloxane) (PDMS) substrate. In 2003, do Lago et al. 16 proposed the direct fabrication of microfluidic devices using a laser printer for the deposition of toner layers on polyester films followed by a thermal lamination for sealing of channels at low temperature. Since this pioneering report, laser printing technology (LPT) has been used to produce microfluidic toner-based analytical devices (µTADs) at very low cost. Due to the advantages associated with the fabrication simplicity and low cost per device, some authors have extended the use of LPT to produce toner-based devices for clinical assays involving the use of portable equipment like cell phone camera, scanner, digital camera and handheld optical microscope for colorimetric measurements. The association of toner-based devices and colorimetric Colorimetric Detection of Glucose in Biological Fluids Using Toner-Based Microzone Plates J. Braz. Chem. Soc. 198 detection is quite attractive for point-of-care (POC) testing due to operational simplicity and low instrumental requirements. Furthermore, the ment...

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Direct Toner Printing: A Versatile Technology for Easy Fabrication of Flexible Miniaturized Electrodes

2017

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We reported here three simple, low cost and easy to accomplish strategies for the fabrication of microelectrodes and other conductive patterns using ordinary office laser‐printers. In this work, toner patterns were directly printed onto the flexible substrate, acting as a mask to create the intended conductive design. To highlight the versatility of such technology, toner‐printed patterns were employed in two diverse ways: one in which the patterned toner had the exact design of the electrode and other employing a reverse toner‐printed pattern. The first one was used for the adaptation of the well‐known printed circuit board (PCB) fabrication technique, but using direct toner printing (DTP) in an already conductive flexible substrate. The second was employed for the two remaining strategies: one based on the deposition of conductive film, followed by lift‐off process; and another based on drop‐casting of a conductive ink into the formed toner cavities, followed by thermal cure. As proof‐of‐concept, all three DTP strategies were used for the fabrication of miniaturized gold electrodes in polyimide substrate, and electrochemical performance of each obtained electrode was evaluated by cyclic voltammetry. Insights about DTP technology, alignment issues, advantages, limitations and resolution of each presented approach were provided. Finally, direct toner printing showed to be a simple, affordable and quite promising technology for the fabrication of low cost point‐of‐care electrochemical devices using flexible platforms.

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Disposable copper random microarray sensor using toner masks: Fabrication and application

Cited by 7 publications

References 34 publications

Gold random microarrays: design, characterization and amperometric determination of ciclopirox olamine in pharmaceutical products

Gold random microarrays: design, characterization and amperometric determination of ciclopirox olamine in pharmaceutical products

Colorimetric Detection of Glucose in Biological Fluids Using Toner-Based Microzone Plates

Direct Toner Printing: A Versatile Technology for Easy Fabrication of Flexible Miniaturized Electrodes

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