A5004600691- Graphene research and applications
- Advanced biosensing and bioanalysis techniques
- Molecular Junctions and Nanostructures
- Biosensors and Analytical Detection
- Electrochemical sensors and biosensors
- Graphene and Nanomaterials Applications
- Surface Chemistry and Catalysis
- Quantum and electron transport phenomena
- Bacteriophages and microbial interactions
- Mosquito-borne diseases and control
- Porphyrin and Phthalocyanine Chemistry
- 2D Materials and Applications
- SARS-CoV-2 detection and testing
- Low-power high-performance VLSI design
- Advancements in Semiconductor Devices and Circuit Design
- Surface and Thin Film Phenomena
Technical University of Denmark
2022-2024
Universidade Federal de Minas Gerais
2018-2022
Prefeitura Municipal de Belo Horizonte
2022
The association of organic molecules with two-dimensional (2D) materials, creating hybrid systems mutual influences, constitutes an important testbed for both basic science self-assembly studies and perspective applications. Following this concept, in work, we show a rich phenomenology that is involved the interaction thionine graphene, leading to material formed by well-organized self-assembled structures atop graphene. This composite system investigated atomic force microscopy, electric...
Zika virus (ZIKV) is a mosquito-borne that phylogenetically close to other medically important flaviviruses with high global public health significance, such as dengue (DENV) and yellow fever (YFV) viruses. Correct diagnosis of flavivirus infection can be challenging, particularly in world regions where more than one co-circulates YFV vaccination mandatory. Acid nucleic aptamers are oligonucleotides bind specific target molecule affinity specificity. Because their unique characteristics,...
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), etiological agent for the disease 2019 (COVID-19), has resulted in over 775 million global infections. Early diagnosis remains pivotal effective epidemiological surveillance despite availability of vaccines. Antigen-based assays are advantageous early COVID-19 detection due to their simplicity, cost-effectiveness, and suitability point-of-care testing (PoCT). This study introduces a graphene field-effect transistor-based...
Abstract In this study, we develop a real-time PCR strategy to directly detect and quantify DNA aptamers on functionalized graphene surfaces using Staphylococcus aureus aptamer (SA20) as demonstration case. We show that allowed quantification in the range of 0.05 fg 2.5 ng. Using quantitative technique, it was possible determine functionalization with amino modified SA20 (preceded by surface modification thionine) much more efficient than process pyrene modification. also demonstrated...
The van der Pauw technique is the gold standard for measuring sheet resistance of thin conductors by relying on combination two 4-point measurements obtained in different current–voltage probe configurations. presence hysteresis and/or time-dependent effects will result producing inaccurate and misleading results. This limitation can be overcome simultaneously resistances at frequencies with lock-in amplifiers. In this work, we discuss detail fundamental requirements practical considerations...
The large-scale production of high-quality and clean graphene devices, aiming at technological applications, has been a great challenge over the last decade. This is due to high affinity with polymers that are usually applied in standard lithography processes that, inevitably, modify electrical proprieties graphene. By Raman spectroscopy electrical-transport investigations, we correlate room-temperature carrier mobility devices size well-ordered domains In addition, show these highly...
Surface modifications with organic molecules comprise a versatile tool to enable applications of graphene in the field biotechnology. In this context, interfacing ligands such as antibodies and aptamers constitutes prevalent methodology for realization bioselective surfaces. Following concept, work, we describe two novel routes surface devices <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Staphylococcus aureus</i> (SA20), which render...