Habdias de Araujo Silva Neto
@qmc.ufsc.br
Professor of Analytical Chemistry at department of chemistry / Federal University of Santa Catarina
Federal University of Santa Catarina
RESEARCH, TEACHING, or OTHER INTERESTS
Analytical Chemistry, Electrochemistry
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Habdias A. Silva-Neto, Paulo J.S. Barbeira, Wendell K.T. Coltro, and Evandro Piccin
Elsevier BV
Habdias A. Silva-Neto, Lucas F. de Lima, Danielly S. Rocha, Vanessa N. Ataide, Gabriel N. Meloni, Giulia Moro, Ada Raucci, Stefano Cinti, Thiago R.L.C. Paixão, William R. de Araujo,et al.
Elsevier BV
Pedro V. V. Romanholo, Larissa M. de Andrade, Habdias A. Silva-Neto, Wendell K. T. Coltro, and Livia F. Sgobbi
American Chemical Society (ACS)
The patterning of hydrophilic paper with hydrophobic materials has emerged as an interesting method for the fabrication of paper-based devices (PADs). Herein, we demonstrate a digitally automated, easy, low-cost, eco-friendly, and readily available method to create highly hydrophobic barriers on paper that can be promptly employed with PADs by simply using a bioink made with rosin, a commercially available natural resin obtained from conifer trees. The bioink can be easily delivered with the use of a ballpoint pen to produce water- and organic solvent-resistant barriers, showing superior properties when compared to other methods such as wax-printing or permanent markers. The approach enables the pen to be attached to a commercially available cutting printer to perform the semiautomated fabrication of hydrophobic barriers for PADs. With the aid of digitally controlled optimization, together with features of machine learning and design of experiments, we show a thorough investigation on the barrier strength that can be further adjusted to the desired application's needs. Then, we explored the barrier sturdiness across various uses, such as wide range aqueous pH sensing and the harsh acidic/organic conditions needed for the colorimetric detection of cholecalciferol.
Habdias A. Silva-Neto, Jordana C. Jaime, Danielly S. Rocha, Livia F. Sgobbi, and Wendell K.T. Coltro
Elsevier BV
Danielly S. Rocha, Thaísa A. Baldo, Habdias A. Silva-Neto, Gerson F. Duarte-Junior, Gabriela S. Bazílio, Clayton L. Borges, Juliana A. Parente-Rocha, William R. de Araujo, Abner de Siervo, Thiago R.L.C. Paixão,et al.
Elsevier BV
Vanderli Garcia Leal, Habdias A. Silva-Neto, Sidnei Gonçalves da Silva, Wendell Karlos Tomazelli Coltro, and João Flávio da Silveira Petruci
American Chemical Society (ACS)
Habdias A. Silva-Neto, Valtencir Zucolotto, Emmanuel B. D'Alessandro, Maria G.O. Tavares, Nelson R. Antoniosi Filho, Wendell K.T. Coltro, Guilherme M. Grosseli, Pedro S. Fadini, and Roberta C. Urban
Elsevier BV
Laísa C. Oliveira, Danielly S. Rocha, Habdias A. Silva-Neto, Thaísa A. C. Silva, and Wendell K. T. Coltro
Springer Science and Business Media LLC
Leyllanne K.A. Souza, Habdias A. Silva-Neto, Danielly S. Rocha, Fabiane C. de Abreu, Anielle C.A. Silva, Noelio O. Dantas, Wendell K.T. Coltro, and Paulo T. Garcia
Elsevier BV
Lucas R. Sousa, Habdias A. Silva-Neto, Lucas F. Castro, Karoliny A. Oliveira, Federico Figueredo, Eduardo Cortón, and Wendell K. T. Coltro
Springer Science and Business Media LLC
Danielly S. Rocha, Richard P.S. de Campos, Habdias A. Silva-Neto, Gerson F. Duarte-Junior, Fethi Bedioui, and Wendell K.T. Coltro
Elsevier BV
Larissa M. Andrade, Pedro V.V. Romanholo, Ana Carolina A. Ananias, Kamylla P. Venancio, Habdias A. Silva-Neto, Wendell K.T. Coltro, and Livia F. Sgobbi
Elsevier BV
Habdias A. Silva-Neto, Lucas C. Duarte, and Wendell K. T. Coltro
CRC Press
Habdias A. Silva-Neto, Gerson F. Duarte-Junior, Danielly S. Rocha, Fethi Bedioui, Anne Varenne, and Wendell K. T. Coltro
American Chemical Society (ACS)
Here, we propose a recyclable approach using acrylonitrile-butadiene-styrene (ABS) residues from additive manufacturing in combination with low-cost and accessible graphite flakes as a novel and potential mixture for creating a conductive paste. The graphite particles were successfully incorporated in the recycled thermoplastic composite when solubilized with acetone and the mixture demonstrated greater adherence to different substrates, among which cellulose-based material made possible the construction of a paper-based electrochemical sensor (PES). The morphological, structural, and electrochemical characterizations of the recycled electrode material were demonstrated to be similar to those of the traditional carbon-based surfaces. Faradaic responses based on redox probe activity ([Fe(CN)6]3-/4-) exhibited well-defined peak currents and diffusional mass transfer as a quasi-reversible system (96 ± 5 mV) with a fast heterogeneous rate constant value of 2 × 10-3 cm s-1. To improve the electrode electrochemical properties, both the PES and the classical 3D-printed electrode surfaces were modified with a combination of multiwalled carbon nanotubes (MWCNTs), graphene oxide (GO), and copper. Both electrode surfaces demonstrated the suitable oxidation of nitrite at 0.6 and 0.5 V vs Ag, respectively. The calculated analytical sensitivities for PES and 3D-printed electrodes were 0.005 and 0.002 μA/(μmol L-1), respectively. The proposed PES was applied for the indirect amperometric analysis of S-nitroso-cysteine (CysNO) in serum samples via nitrite quantitation, demonstrating a limit of detection of 4.1 μmol L-1, with statistically similar values when compared to quantitative analysis of the same samples by spectrophotometry (paired t test, 95% confidence limit). The evaluated electroanalytical approach exhibited linear behavior for nitrite in the concentration range between 10 and 125 μmol L-1, which is suitable for realizing clinical diagnosis involving Parkinson's disease, for example. This proof of concept shows the great promise of this recyclable strategy combining ABS residues and conductive particles in the context of green chemical protocols for constructing disposable sensors.
Habdias Silva-Neto, Gerson Duarte-Junior, Gabriela Bazílio, Juliana Parente-Rocha, Diego Colugnati, Clayton Borges, and Wendell Coltro
Sociedade Brasileira de Quimica (SBQ)
3D PRINTING OF MAGNETIC SEPARATOR: AN AFFORDABLE APPROACH TO SAMPLE PREPARATION IN THE COVID-19 DIAGNOSIS. This report describes the fabrication of a low-cost magnetic separator holder combining 3D printing and compact neodymium blocks for allowing magnetic extraction and purification of RNA from samples collected by nasopharyngeal swab from patients infected by SARS-CoV-2. The device was designed to contain 24 entrances for plastic microtubes in an arrangement like a commercial device. The proof of concept of the proposed device was successfully demonstrated through the sample extraction and purification of swab samples collected from eight patients suspected of SARS-CoV-2 infection. The sample preparation protocol was performed using a commercial kit containing magnetic beads and different solutions. The performance of the printed device was compared to a commercial magnetic separator, usually employed in the golden standard techniques. The fabrication of the 3D printed magnetic separator was completed under optimized printing conditions within 6 h at cost of 4 USD per unit. The RNA extracted from samples using both devices was analyzed by reverse transcriptase quantitative polymerase chain reaction (RT-qPCR) and the achieved results have indicated no statistical different at confidence level of 95%. Based on the achievements, the use of 3D printing and neodymium blocks have demonstrated an alternative route to be used in routing analysis associated to COVID-19 diagnosis.
Habdias A. Silva-Neto, Iana V.S. Arantes, André L. Ferreira, Guida H.M. do Nascimento, Gabriel N. Meloni, William R. de Araujo, Thiago R.L.C. Paixão, and Wendell K.T. Coltro
Elsevier BV
Lucas R. Sousa, Habdias A. Silva-Neto, Pedro P.E. Campos, Gerson F. Duarte-Junior, Iris Medeiros Junior, Rogerio M. Carvalho, and Wendell K.T. Coltro
Elsevier BV
Habdias A. Silva-Neto, Danielly S. Rocha, Lauro A. Pradela-Filho, Thiago R. L. C. Paixão, and Wendell K. T. Coltro
Springer International Publishing
Lucas C. Duarte, Thaisa A. Baldo, Habdias A. Silva-Neto, Federico Figueredo, Bruno C. Janegitz, and Wendell K.T. Coltro
Elsevier BV
Habdias A. Silva-Neto, Anderson A. Dias, and Wendell K. T. Coltro
Springer Science and Business Media LLC
Jéssica Santos Stefano, Luiz Otávio Orzari, Habdias Araujo Silva-Neto, Vanessa Neiva de Ataíde, Letícia Francine Mendes, Wendell Karlos Tomazelli Coltro, Thiago Regis Longo Cesar Paixão, and Bruno Campos Janegitz
Current Opinion in Electrochemistry Elsevier BV
Lucas R. Sousa, Habdias A. Silva-Neto, Nikaele S. Moreira, Bárbara G.S. Guinati, and Wendell K.T. Coltro
Elsevier
Lucas F. Castro, Habdias A. Silva-Neto, Lucas R. Sousa, William R. de Araujo, and Wendell K.T. Coltro
Elsevier BV
Pedro V.V. Romanholo, Habdias A. Silva-Neto, Lívia F. Sgobbi, and Wendell K.T. Coltro
Elsevier
Danielly Rocha, Habdias Silva-Neto, Laísa Oliveira, Shellyda Souza, Mário Santana, and Wendell Coltro
Brazilian Journal of Analytical Chemistry
Forensic studies are extremally important to investigate suspected adulterations of consumable products, such as Viagra®. This report describes the determination of sildenafil citrate (SC) in commercial and adulterated tablets based on square-wave voltammetry (SWV) measurements using disposable stencil-printed carbon electrodes. The conductive ink used for the manufacture of integrated electrodes was produced by combining graphite powder and glass varnish. To promote a reusable strategy for limiting the geometric area of the electrodes, a 3D-printed holder was constructed. Detailed morphological and electrochemical characterization studies revealed well-defined graphite flakes incorporated on the polymeric substrate and a faster heterogeneous electron-transfer rate constant (Ks = 1.3 × 10–3 cm s–1). Based on the analytical performance, a linear behavior was observed in a SC concentration range from 1 to 20 µmol L–1 with limit of detection equal to 0.2 µmol L–1. The selectivity of the proposed method was evaluated and the presence of potentially interfering compounds like phosphate, lactose, paracetamol and tadalafil and no difference higher than 15% was observed. The analysis of SC was performed in commercial and seized tablets and the achieved values were 50 ± 1 mg for Viagra® tablet, 54 ± 1 mg for generic formulations 38 ± 1 mg for seized tablet. In addition, the proposed method offered satisfactory accuracy (98.2 – 102.0%) no noticeable matrix effect. Lastly, considering the achieved results, the use of stencil-printed carbon electrodes and SWV has demonstrated to be a powerful and robust analytical tool for forensic investigations.