Screen Printed
Mostrando 1-12 de 38 artigos, teses e dissertações.
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1. Electroanalytical Method for Determination of Trace Metals in Struvite Using Electrochemically Treated Screen-Printed Gold Electrodes
We present an electroanalytical method using square-wave anodic stripping voltammetry on electrochemically-treated screen-printed gold electrodes to the simultaneous determination of lead(II), copper(II) and mercury(II) in struvite (natural fertilizer produced from urine). Electrochemical treatment via cyclic voltammetry of the working electrodes increased s
J. Braz. Chem. Soc.. Publicado em: 2020-09
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2. Drawing Electrochemical Sensors Using a 3D Printing Pen
This communication demonstrates that a 3D printing pen, commercially-available as a toy for kids, can be used to draw thermoplastic electrochemical sensors using conductive filaments over any desirable format and substrate. A polylactic acid filament containing graphene or carbon black was passed through the 3D pen that works as a handheld 3D printer (fused
J. Braz. Chem. Soc.. Publicado em: 2020-09
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3. METODOLOGIA PARA DETECÇÃO ELETROQUÍMICA QUALITATIVA DE COMPOSTOS ORGÂNICOS EM INTERFACES PETRÓLEO/ÁGUA
The possibility of detecting some organic compounds directly in a petroleum/water interface was described. Aqueous phase was composed by 1 x 10-3 mol L-1 NaCl solution and the oil phase was carried out using crude oil forming an oil/water interface. Carbon based screen-printed electrodes was used in conjunction with square-wave voltammetry technique, constit
Quím. Nova. Publicado em: 2019-01
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4. ANÁLISE POR INJEÇÃO SEQUENCIAL COM DETECÇÃO POR VOLTAMETRIA DE ONDA QUADRADA PARA DETERMINAÇÃO DE As(III) EM AMOSTRAS DE ÁGUAS USANDO ELETRODO DE OURO
A sequential injection method with square wave anodic stripping voltammetry (SI-SWASV) using screen printed and crystalline gold electrode was developed for determination of As(III). The carrier solution used for electrode conditioning and stripping medium was composed of 0.050 mol L-1 HCl, whereas the supporting electrode for samples (deposition medium) was
Quím. Nova. Publicado em: 2018-01
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5. DETERMINAÇÃO RÁPIDA E SIMPLES DE CITRATO DE SILDENAFILA (VIAGRA® E GENÉRICOS) EMPREGANDO ELETRODO IMPRESSO DE CARBONO EM SISTEMAS FIA E BIA COM DETECÇÃO AMPEROMÉTRICA
This work presents two amperometric methods for Sildenafil Citrate (SC) determination in erectile dysfunction drugs (Viagra® and Generics), using Batch Injection Analysis (BIA) and Flow Injection Analysis (FIA) systems with a cell for Screen Printed Electrodes (SPE). In Britton- Robinson buffer solution (pH 2), the SC presented an irreversible anodic peak a
Quím. Nova. Publicado em: 2017-08
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6. The influence of heat treatment on the quality of screen printed textile substrates
ABSTRACT During exploitation, textile products printed with screen printing technique are quite often exposed to various influences, one of which is a heat treatment- firstly during the production process and later on when ironing. Heat is simultaneously affecting deposited colorants (ink) on the surface of the substrate material, as well as textile fibers i
Matéria (Rio J.). Publicado em: 11/05/2017
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7. Washing treatment impact on print quality of screen printed knitted fabrics
ABSTRACT The surface of textile materials is highly textured, commonly in non-uniform ways. Because of this texture effect, textile surface appears rougher and more porous than other printing substrates, which can cause excessive ink penetration during printing process. Next, washing process is very important factor because it influences ink characteristics
Matéria (Rio J.). Publicado em: 2016-09
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8. Characterization of Polylactide-Stabilized Gold Nanoparticles and Its Application in the Fabrication of Electrochemical DNA Biosensors
In this work, two different approaches to gold nanoparticles (AuNPs) have been explored for the modification of screen-printed electrode based on AuNPs and AuNPs stabilized with polylactic acid (PLA). The modified substrate has been characterized using UV-Vis spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanni
J. Braz. Chem. Soc.. Publicado em: 2016-09
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9. COMPARAÇÃO DE PROCESSAMENTOS MATEMÁTICOS DE DADOS VOLTAMÉTRICOS: APLICAÇÃO NA DETERMINAÇÃO SIMULTÂNEA DE FLUOROQUINOLONAS
This paper describes a comparative study between the procedures of deconvolution and the second-order derivative of square wave voltammograms to achieve separation of the voltammetric peaks of levofloxacin (LEVO) and norfloxacin (NOR), for their simultaneous quantification in urine samples. The obtained results indicate that the use of second-derivative volt
Quím. Nova. Publicado em: 2015-12
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10. Analysis of thin bifacial silicon solar cells with locally diffused and selective back surface field
The aim of this work is to present the development and comparison of thin n+pp+ industrial bifacial silicon solar cells produced with the local screen-printed Al back surface field (BSF) to those with the selective BSF doped with aluminum-boron. To produce solar cells with selective BSF, the boron diffusion based on spin-on dopant was introduced in the proce
Mat. Res.. Publicado em: 09/09/2014
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11. Fingerprinting breath: electrochemical monitoring of markers indicative of bacteria Mycobacterium tuberculosis infection
Recentemente demonstrou-se que marcadores químicos no ar inalado/exalado podem fornecer uma metodologia para a detecção de infecção de tuberculose. Esses marcadores consistem em metil fenilacetato, metil p-anisato, metil nicotinato e o-fenilanisol (2-metoxibifenil). As abordagens atuais usam cromatografia gasosa com detector de massas (GCMS) que são ú
J. Braz. Chem. Soc.. Publicado em: 2014-09
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12. Nanostructured screen-printed electrodes modified with self-assembled monolayers for determination of metronidazole in different matrices
Neste trabalho é descrito o desenvolvimento de um sensor para detecção de metronidazol, usando um método simples para preparar estruturas nanoporosas de ouro em eletrodos impressos comerciais modificados com monocamadas autoarranjadas de tiol (SAMs). O processo envolve a formação inicial de espécies de ouro oxidadas a pH 7,0, e posteriormente a reduç
J. Braz. Chem. Soc.. Publicado em: 2014-09