Niklas Wester
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View article: Electrochemical Point‐of‐Care Test for Assessing Serum Paracetamol Concentration: Comparison With Traditional Methods and Detection of Concomitant Drugs
Electrochemical Point‐of‐Care Test for Assessing Serum Paracetamol Concentration: Comparison With Traditional Methods and Detection of Concomitant Drugs Open
Rapid serum paracetamol (acetaminophen) concentration measurement is essential in suspected intoxication, but centralized laboratory analyses often delay initiation of antidotal therapy. We studied the feasibility of a novel electrochemica…
View article: Optically transparent electrodes for ultrasensitive real-time detection of dopamine in brain-on-a-chip applications
Optically transparent electrodes for ultrasensitive real-time detection of dopamine in brain-on-a-chip applications Open
Brain-on-a-chip models are rapidly being adopted in disease modeling and drug discovery, however characterization of the brain model condition often requires both the use of microscopy techniques and evaluation of neuronal activity. Althou…
View article: Hierarchical magnetic self-assembly of few-nanometer rutile TiO<sub>2</sub> particles <i>via</i> magnetron sputtering
Hierarchical magnetic self-assembly of few-nanometer rutile TiO<sub>2</sub> particles <i>via</i> magnetron sputtering Open
Room-temperature synthesis of hierarchical magnetic self-assemblies of few-nanometer rutile TiO 2 particles via magnetron sputtering, for photocatalytic applications.
View article: Protein Adsorption and Its Effects on Electroanalytical Performance of Nanocellulose/Carbon Nanotube Composite Electrodes
Protein Adsorption and Its Effects on Electroanalytical Performance of Nanocellulose/Carbon Nanotube Composite Electrodes Open
Protein fouling is a critical issue in the development of electrochemical sensors for medical applications, as it can significantly impact their sensitivity, stability, and reliability. Modifying planar electrodes with conductive nanomater…
View article: Introduction of an electrochemical point‐of‐care assay for quantitative determination of paracetamol in finger‐prick capillary whole blood samples
Introduction of an electrochemical point‐of‐care assay for quantitative determination of paracetamol in finger‐prick capillary whole blood samples Open
Aims Measuring venous plasma paracetamol concentrations is time‐ and resource‐consuming. We aimed to validate a novel electrochemical point‐of‐care (POC) assay for rapid paracetamol concentration determinations. Methods Twelve healthy volu…
View article: Role of Nanocellulose in Tailoring Electroanalytical Performance of Hybrid Nanocellulose / Multiwalled Carbon Nanotube Electrodes
Role of Nanocellulose in Tailoring Electroanalytical Performance of Hybrid Nanocellulose / Multiwalled Carbon Nanotube Electrodes Open
Nanocellulose has emerged as a promising green dispersant for carbon nanotubes (CNT), and there is an increasing trend in developing nanocellulose / CNT hybrid materials for electrochemical detection of various small molecules. However, th…
View article: What Determines the Electrochemical Properties of Nitrogenated Amorphous Carbon Thin Films?
What Determines the Electrochemical Properties of Nitrogenated Amorphous Carbon Thin Films? Open
Linking structural and compositional features with the observed electrochemical performance is often ambiguous and sensitive to known and unknown impurities. Here an extensive experimental investigation augmented by computational analyses …
View article: Functionalized Nanocellulose/Multiwalled Carbon Nanotube Composites for Electrochemical Applications
Functionalized Nanocellulose/Multiwalled Carbon Nanotube Composites for Electrochemical Applications Open
Four different types of crystalline and fibrillar nanocellulosic materials with different functional groups (sulfate, carboxylate, amino-silane) are produced and used to disperse commercial multiwalled carbon nanotubes (MWCNT). Aqueous nan…
View article: Electrochemical Detection of Morphine in Untreated Human Capillary Whole Blood
Electrochemical Detection of Morphine in Untreated Human Capillary Whole Blood Open
Disposable single-use electrochemical sensor strips were used for quantitative detection of small concentrations of morphine in untreated capillary whole blood. Single-walled carbon nanotube (SWCNT) networks were fabricated on a polymer su…
View article: Trends in Carbon, Oxygen, and Nitrogen Core in the X-ray Absorption Spectroscopy of Carbon Nanomaterials: A Guide for the Perplexed
Trends in Carbon, Oxygen, and Nitrogen Core in the X-ray Absorption Spectroscopy of Carbon Nanomaterials: A Guide for the Perplexed Open
Successful deployment of carbon nanomaterials in many applications, such as sensing, energy storage, and catalysis, relies on the selection, synthesis, and tailoring of the surface properties. Predictive analysis of the behavior is difficu…
View article: Disposable Nafion-Coated Single-Walled Carbon Nanotube Test Strip for Electrochemical Quantitative Determination of Acetaminophen in a Finger-Prick Whole Blood Sample
Disposable Nafion-Coated Single-Walled Carbon Nanotube Test Strip for Electrochemical Quantitative Determination of Acetaminophen in a Finger-Prick Whole Blood Sample Open
A disposable electrochemical test strip for the quantitative point-of-care (POC) determination of acetaminophen (paracetamol) in plasma and finger-prick whole blood was fabricated. The industrially scalable dry transfer process of single-w…
View article: Electrochemical Detection of Oxycodone and Its Main Metabolites with Nafion-Coated Single-Walled Carbon Nanotube Electrodes
Electrochemical Detection of Oxycodone and Its Main Metabolites with Nafion-Coated Single-Walled Carbon Nanotube Electrodes Open
Oxycodone is a strong opioid frequently used as an analgesic. Although proven efficacious in the management of moderate to severe acute pain and cancer pain, use of oxycodone imposes a risk of adverse effects such as addiction, overdose, a…
View article: Single-Walled Carbon Nanotube Network Electrodes for the Detection of Fentanyl Citrate
Single-Walled Carbon Nanotube Network Electrodes for the Detection of Fentanyl Citrate Open
Here, we prepare disposable single-walled carbon nanotube network electrodes for the detection of the potent opioid fentanyl, currently a leading cause for opioid overdose deaths in the USA. We show repeatable dry transfer of single-walled…
View article: Biofouling affects the redox kinetics of outer and inner sphere probes on carbon surfaces drastically differently – implications to biosensing
Biofouling affects the redox kinetics of outer and inner sphere probes on carbon surfaces drastically differently – implications to biosensing Open
Biofouling affects the redox kinetics of outer and inner sphere probes on carbon surfaces drastically differently.
View article: Simultaneous Detection of Morphine and Codeine in the Presence of Ascorbic Acid and Uric Acid and in Human Plasma at Nafion Single-Walled Carbon Nanotube Thin-Film Electrode
Simultaneous Detection of Morphine and Codeine in the Presence of Ascorbic Acid and Uric Acid and in Human Plasma at Nafion Single-Walled Carbon Nanotube Thin-Film Electrode Open
In clinical settings, the dosing and differential diagnosis of the poisoning of morphine (MO) and codeine (CO) is challenging due to interindividual variations in metabolism. However, direct electrochemical detection of these analytes from…
View article: Multiwalled Carbon Nanotubes/Nanofibrillar Cellulose/Nafion Composite-Modified Tetrahedral Amorphous Carbon Electrodes for Selective Dopamine Detection
Multiwalled Carbon Nanotubes/Nanofibrillar Cellulose/Nafion Composite-Modified Tetrahedral Amorphous Carbon Electrodes for Selective Dopamine Detection Open
We introduce a composite membrane comprised of multiwalled carbon nanotubes (MWCNTs) dispersed in a matrix of sulfated nanofibrillar cellulose (SNFC) and Nafion. The high negative charge densities of the SNFC and Nafion ionomers enhance th…
View article: Room‐Temperature Micropillar Growth of Lithium–Titanate–Carbon Composite Structures by Self‐Biased Direct Current Magnetron Sputtering for Lithium Ion Microbatteries
Room‐Temperature Micropillar Growth of Lithium–Titanate–Carbon Composite Structures by Self‐Biased Direct Current Magnetron Sputtering for Lithium Ion Microbatteries Open
Here, an unidentified type of micropillar growth is described at room temperature during conventional direct‐current magnetron sputtering (DC‐MS) deposition from a Li 4 Ti 5 O 12 +graphite sputter target under negative substrate bias and h…
View article: In-situ functionalization of tetrahedral amorphous carbon by filtered cathodic arc deposition
In-situ functionalization of tetrahedral amorphous carbon by filtered cathodic arc deposition Open
Modification of the surface chemistry of carbon-based nanomaterials is often necessary in order to embrace their full potential. A wide variety of different post-fabrication treatments, such as acid, oxidizing plasma and heat treatments ha…
View article: Fabrication of Micro- and Nanopillars from Pyrolytic Carbon and Tetrahedral Amorphous Carbon
Fabrication of Micro- and Nanopillars from Pyrolytic Carbon and Tetrahedral Amorphous Carbon Open
Pattern formation of pyrolyzed carbon (PyC) and tetrahedral amorphous carbon (ta-C) thin films were investigated at micro- and nanoscale. Micro- and nanopillars were fabricated from both materials, and their biocompatibility was studied wi…
View article: Hybrid X-ray Spectroscopy-Based Approach To Acquire Chemical and Structural Information of Single-Walled Carbon Nanotubes with Superior Sensitivity
Hybrid X-ray Spectroscopy-Based Approach To Acquire Chemical and Structural Information of Single-Walled Carbon Nanotubes with Superior Sensitivity Open
High-resolution nondestructive chemical analysis of both bulk and surface of application-ready carbon nanomaterials is needed to connect the material properties to the observed performance. This is needed to enable application-specific tai…
View article: Pt-grown carbon nanofibers for detection of hydrogen peroxide
Pt-grown carbon nanofibers for detection of hydrogen peroxide Open
Application specific Pt-grown carbon nanofibers for H2O2 detection were characterized and the roles of dissolved oxygen and chloride ions on the electrochemical performance were assessed in detail.
View article: Characterization and electrochemical properties of iron-doped tetrahedral amorphous carbon (ta-C) thin films
Characterization and electrochemical properties of iron-doped tetrahedral amorphous carbon (ta-C) thin films Open
Surface iron levels as low as 0.4 at% (XPS) can considerably change the electrochemical properties of initially inert carbon surfaces.
View article: Carbon 3D microelectrode arrays for neuron and brain slice measurements
Carbon 3D microelectrode arrays for neuron and brain slice measurements Open
Event Abstract Back to Event Carbon 3D microelectrode arrays for neuron and brain slice measurements Joonas J. Heikkinen1*, Ville Rontu1, Emilia Peltola2, Tiina Kaarela3, 4, Niklas Wester5, Jari Koskinen5, Tomi Taira3, 4, Sari E. Lauri3, 6…