Telma Domingues
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View article: Analytical modeling and experimental characterization of drift in electrolyte-gated graphene field-effect transistors
Analytical modeling and experimental characterization of drift in electrolyte-gated graphene field-effect transistors Open
Electrolyte-gated graphene field-effect transistors are increasingly attractive as platforms for high-sensitivity and low-detection limit biosensing or in synaptic or memristive elements used in neuromorphic computing. However, their elect…
View article: Tailoring DNA Surface Interactions on Single-Layer Graphene: Comparative Analysis of Pyrene, Acridine, and Fluorenyl Methyl Linkers
Tailoring DNA Surface Interactions on Single-Layer Graphene: Comparative Analysis of Pyrene, Acridine, and Fluorenyl Methyl Linkers Open
This study investigates the effect of different linkers and solvents on the immobilization of DNA probes on graphene surfaces, which are crucial for developing high-performance biosensors. Quartz crystal microbalance with dissipation (QCM-…
View article: Graphene Biosensors Operated in DC Transistor and AC Electrochemical Modes for DNA Sensing
Graphene Biosensors Operated in DC Transistor and AC Electrochemical Modes for DNA Sensing Open
Graphene is considered for different technological applications, particularly biosensing, due to its unique electrical and electronic properties, such as its ambipolar transport and ballistic electron dynamics. Thus, graphene-based setups …
View article: Molecular Characterization and DNA-sensing using Graphene Electrochemical Devices under Illumination
Molecular Characterization and DNA-sensing using Graphene Electrochemical Devices under Illumination Open
In the AC-electrochemical mode, the signal of quantum capacitance (Cq) of individual graphene channels was resolved as a function of a superimposed DC bias potential through electrochemical impedance spectroscopy (EIS). This capacitive res…
View article: Integrated Approach from Sample-to-Answer for Grapevine Varietal Identification on a Portable Graphene Sensor Chip
Integrated Approach from Sample-to-Answer for Grapevine Varietal Identification on a Portable Graphene Sensor Chip Open
Identifying grape varieties in wine, related products, and raw materials is of great interest for enology and to ensure its authenticity. However, these matrices' complexity and low DNA content make this analysis particularly challenging. …
View article: Attomolar detection of hepatitis C virus core protein powered by molecular antenna-like effect in a graphene field-effect aptasensor
Attomolar detection of hepatitis C virus core protein powered by molecular antenna-like effect in a graphene field-effect aptasensor Open
Biosensors based on graphene field-effect transistors have become a promising tool for detecting a broad range of analytes. However, their performance is substantially affected by the functionalization protocol. In this work, we use a cont…
View article: Ultrasensitive dopamine detection with graphene aptasensor multitransistor arrays
Ultrasensitive dopamine detection with graphene aptasensor multitransistor arrays Open
Detecting physiological levels of neurotransmitters in biological samples can advance our understanding of brain disorders and lead to improved diagnostics and therapeutics. However, neurotransmitter sensors for real-world applications mus…
View article: Optimizing PMMA solutions to suppress contamination in the transfer of CVD graphene for batch production
Optimizing PMMA solutions to suppress contamination in the transfer of CVD graphene for batch production Open
Mass production and commercial adoption of graphene-based devices are held back by a few crucial technical challenges related to quality control. In the case of graphene produced by chemical vapor deposition, the transfer process represent…
View article: Optimizing PMMA solutions to suppress contamination in the transfer of CVD graphene for batch production
Optimizing PMMA solutions to suppress contamination in the transfer of CVD graphene for batch production Open
The mass production and consequent commercial adoption of graphene-based devices is still held back by a few crucial technical challenges related to quality control. In the case of graphene produced by chemical vapor deposition (CVD), the …
View article: Programmable graphene-based microfluidic sensor for DNA detection
Programmable graphene-based microfluidic sensor for DNA detection Open
This study presents the development of a lab-on-a-chip (LoC) by integrating a graphene field-effect transistor (FET) chip with a programmable microfluidic device for DNA detection. The real-time biochemical events on the graphene FET chip …
View article: Attomolar detection of hepatitis C virus core protein powered by molecular antenna-like graphene effect
Attomolar detection of hepatitis C virus core protein powered by molecular antenna-like graphene effect Open
Biosensors based on graphene field-effect transistors have become a promising tool for detecting a broad range of analytes. However, they lack the stability and reproducibility required to step into biotechnological and biomedical applicat…
View article: Ultrasensitive Dopamine Detection with Graphene Aptasensor Multitransistor Arrays
Ultrasensitive Dopamine Detection with Graphene Aptasensor Multitransistor Arrays Open
Dopamine is a neurotransmitter with critical roles in the human brain and body, and abnormal dopamine levels underlie brain disorders such as Parkinson’s Disease, Alzheimer’s Disease, and substance addiction. Herein, we present a novel hig…
View article: Influence of the Electrolyte Salt Concentration on DNA Detection with Graphene Transistors
Influence of the Electrolyte Salt Concentration on DNA Detection with Graphene Transistors Open
Liquid-gated Graphene Field-Effect Transistors (GFET) are ultrasensitive bio-detection platforms carrying out the graphene’s exceptional intrinsic functionalities. Buffer and dilution factor are prevalent strategies towards the optimum per…
View article: Clean-Room Lithographical Processes for the Fabrication of Graphene Biosensors
Clean-Room Lithographical Processes for the Fabrication of Graphene Biosensors Open
This work is on developing clean-room processes for the fabrication of electrolyte-gate graphene field-effect transistors at the wafer scale for biosensing applications. Our fabrication process overcomes two main issues: removing surface r…