Showing 1-30 of 44 results for "

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Tomoyuki Kamata et al.
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 31(7), 651-656 (2015-07-15)
We studied a nitrogen-doped nanocarbon film electrode with a nitrogen concentration of lower than 10.9 at% formed by the unbalanced magnetron (UBM) sputtering method. The sp(3) content in the nitrogen-doped UBM sputtering nanocarbon film (N-UBM film) slightly increases with increasing...
Vidhu Sara Vargis et al.
IET nanobiotechnology, 13(2), 107-113 (2019-05-06)
This study describes the development and testing of a simple and novel enzyme-free nanolabel for the detection and signal amplification in a sandwich immunoassay. Gold nanoparticles decorated reduced graphene oxide (rGOAu) was used as the nanolabel for the quantitative detection...
A G Peroff et al.
Physical chemistry chemical physics : PCCP, 18(3), 1578-1586 (2015-12-17)
Protonated heterocyclic amines, such as pyridinium, have been utilized as catalysts in the electrocatalytic reduction of carbon dioxide. While these represent a new and exciting class of electrocatalysts, the details of the mechanism and faradaic processes occurring in solution are...
Daniel Martín-Yerga et al.
Analytica chimica acta, 981, 24-33 (2017-07-12)
In this work, we report a simple and yet efficient stencil-printed electrochemical platform that can be integrated into the caps of sample containers and thus, allows in-field quantification of Cd(II) and Pb(II) in river water samples. The device exploits the...
Giulia Selvolini et al.
Sensors (Basel, Switzerland), 19(14) (2019-07-25)
In this work, we report the development of a simple and sensitive sensor based on graphite screen-printed electrodes (GSPEs) modified by a nanocomposite film for dopamine (DA) detection. The sensor was realized by electrodepositing polyaniline (PANI) and gold nanoparticles (AuNPs)...
Cristiane Kalinke et al.
The Analyst, 145(4), 1207-1218 (2019-12-21)
This paper reports the comparison of the electrochemical properties of 3D PLA-graphene electrodes (PLA-G) under different activation conditions and through different processes. In this work, the performance of the electrodes was evaluated after polishing, electrochemical and chemical treatments and a...
Natalia Stein et al.
Biochemistry, 54(24), 3749-3758 (2015-06-05)
The electrochemical properties of Shewanella oneidensis cytochrome c nitrite reductase (ccNiR), a homodimer that contains five hemes per protomer, were investigated by UV-visible and electron paramagnetic resonance (EPR) spectropotentiometries. Global analysis of the UV-vis spectropotentiometric results yielded highly reproducible values...
Xia Chen et al.
Mikrochimica acta, 186(7), 407-407 (2019-06-12)
This paper presents a method for the preparation of a graphene-based hybrid composite film by electrodeposition of reduced graphene oxide and overoxidized electropolymerized polypyrrole onto a glassy carbon electrode (GCE) using cyclic voltammetry. The morphology of the hybrid composite film...
Shengpan Xu et al.
Analytical and bioanalytical chemistry, 410(23), 5879-5887 (2018-07-01)
We present a novel simple strategy for the detection of Pb2+ based on G-quadruplex DNA and gold nanoparticles. First, gold nanoparticles were chemically adsorbed onto the surface of a thiol-modified gold electrode. Subsequently, the substrate DNA1 was adsorbed onto the...
S Nürnberger et al.
EBioMedicine, 64, 103196-103196 (2021-01-24)
In spite of advances in the treatment of cartilage defects using cell and scaffold-based therapeutic strategies, the long-term outcome is still not satisfying since clinical scores decline years after treatment. Scaffold materials currently used in clinical settings have shown limitations...
Agnieszka Bala et al.
Bioelectrochemistry (Amsterdam, Netherlands), 119, 189-195 (2017-10-22)
A novel electrochemical PNA-based biosensor for the determination of Hg
Qian Yang et al.
Nanoscale, 9(46), 18523-18528 (2017-11-23)
A molecular check valve is a nanomachine that enables unidirectional molecular transport. In this work, we report a novel molecular check valve fabricated by asymmetric modification of a silica nanoporous membrane (SNM) consisting of parallel nanochannels with a diameter of...
Wei Lu et al.
Biosensors & bioelectronics, 90, 258-263 (2016-12-05)
Rolling circle amplification (RCA) is an isothermal amplification technique with high efficiency and perfect accuracy for nucleic acids detection. However, RCA technique suffers the limitation to detect short DNA or RNA molecules. For long nucleic acid molecules, enzymatic restriction as...
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Rui Gusmão et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 21(46), 16474-16478 (2015-10-08)
Fluorographane (C1 Hx F1-x+δ )n is a new member of the graphene family that exhibits hydrophobicity and a large band gap that is tunable based on the level of fluorination. Herein, sensing and energy applications of fluorographane are reported. The...
Alireza Abi et al.
The Analyst, 146(2), 547-557 (2020-11-10)
Hexaammineruthenium(iii), RuHex3+, is a DNA-binding metal complex that is widely used as a redox marker for the indirect determination of DNA coverage at the electrode surface. The conversion of electrochemically quantifiable surface excess of RuHex3+ into DNA surface coverage requires...
Lettie A Smith et al.
Analytical chemistry, 92(2), 2266-2273 (2019-12-14)
We demonstrate the application of open circuit potentiometry (OCP) to measure enzyme turnover kinetics, kturn. The electrode surface will become poised by the addition of a well-behaved redox pair, such as ferrocenemethanol/ferrocenium methanol (FcMeOH/FcMeOH+), which acts as the cosubstrate for...
Jahangir Ahmad Rather et al.
The Analyst, 143(8), 1835-1845 (2018-04-07)
We report the construction of a novel electrochemical femtomolar aptasensing APT-ERGO/GCE interface based on the covalent immobilization of 38-mer amine-functionalized (NH2-APT) 17β-estradiol (E2) DNA aptamers on a graphene amplifying platform. Graphene oxide (GO) was synthesized and characterized by using FTIR...
Binuclear complexes of ruthenium ammines.
Creutz C and Taube H
Journal of the American Chemical Society, 95(4), 1086-1094 (1973)
Hui Zhang et al.
The Analyst, 145(10), 3557-3563 (2020-04-21)
Facile detection of tumour-derived extracellular vesicles (EVs) is crucial to cancer diagnosis. Herein, a facile and label-free electrochemical aptasensor was fabricated to detect tumour-derived EVs based on the target-induced proximity hybridization of split aptamers. In this assay, two designed oligonucleotide...
Misha Liu et al.
Analytical and bioanalytical chemistry, 409(29), 6821-6829 (2017-10-01)
Detection of DNA damage caused by ∙OH or radiation has led to rapidly growing interest in the fields of drug development, biochemistry, clinic diagnostics, and environmental evaluation. Electrochemical methods have been applied for DNA damage detection because of their fast...
Concha Bosch-Navarro et al.
Physical chemistry chemical physics : PCCP, 17(44), 29628-29636 (2015-10-20)
The electrochemical activity of graphene is of fundamental importance to applications from energy storage to sensing, but has proved difficult to unambiguously determine due to the challenges innate to fabricating well defined graphene electrodes free from contamination. Here, we report...
Jialian Ding et al.
Journal of materials chemistry. B, 8(16), 3616-3622 (2020-01-15)
This work reports an enzyme-free glucose sensor based on nickel nanostructures electrodeposited on a fluorine-doped tin oxide (FTO) electrode modified with a silica nanochannel membrane (SNM). The SNM consists of a high density of nanochannels vertically oriented to the electrode...
Wenjing Wang et al.
Chemical Society reviews, 48(18), 4892-4920 (2019-08-14)
DNA nanotechnology engineered at the solid-liquid interface has advanced our fundamental understanding of DNA hybridization kinetics and facilitated the design of improved biosensing, bioimaging and therapeutic platforms. Three research branches of DNA nanotechnology exist: (i) structural DNA nanotechnology for the...
Yi Liu et al.
Science advances, 6(7), eaay5993-eaay5993 (2020-02-29)
Zeolite nanosheets have shown unprecedented opportunities for a wide range of applications, yet developing facile methods for fabrication of uniform zeolite nanosheets remains a great challenge. Here, a facile approach involving anisotropic etching with an aqueous solution of tetrapropylammonium hydroxide...
Maria Moccia et al.
Biosensors & bioelectronics, 165, 112371-112371 (2020-07-31)
Pancreatic ductal adenocarcinoma is the predominant neoplastic disease of the pancreas and it represents the fourth most frequent cause of death in cancer-related disease, with only 8% of survivors after 5-year to the diagnosis. The main issues of this type...
Mika Hatada et al.
Biosensors & bioelectronics, 88, 167-173 (2016-08-16)
Glycated proteins, such as glycated hemoglobin (HbA1c) or glycated albumin (GA) in the blood, are essential indicators of glycemic control for diabetes mellitus. Since GA, compared to HbA1c, is more sensitive to short term changes in glycemic levels, GA is...
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Min Cui et al.
Biosensors & bioelectronics, 79, 736-741 (2016-01-17)
Biocompatible polymers, such as poly(ethylene glycol) (PEG), are of great significance in the development of bio-interfaces and biosensors, as they possess excellent biocompatibility and are easy for modification. A novel highly biocompatible polymer composite was synthesized herein through electrochemical polymerization...
Hiroyuki Yanagisawa et al.
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 31(7), 635-641 (2015-07-15)
The effect of the sp(2)/sp(3) ratio in an unbalanced magnetron sputtered nanocarbon film electrode was studied for determining Cd(2+) and Pb(2+) by anodic stripping voltammetry (ASV). The signal-to-noise ratio in the ASV measurement improved as the sp(3) concentration in the...