In-situ growth of gold nanoparticles on a 3D-network consisting of a MoS2/rGO nanocomposite for simultaneous voltammetric determination of ascorbic acid, dopamine and uric acid

Zhao, Yuechao; Zhou, Juan; Jia, Zimu; Huo, Danqun; Liu, Qing‐Yan; Zhong, Dengqin; Hu, Yu; Yang, Mei; Bian, Minghong; Hou, Changjun

doi:10.1007/s00604-018-3222-7

Cited by 70 publications

(22 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, DNA nanotechnology has been developed and employed in a variety of fields owing to the extensive biological functions of DNA nanostructures . Tetrahedral framework nucleic acids (tFNAs) are synthesized by four isometric single‐stranded DNAs through a simple, rapid, and reliable process, which have been identified as 3D DNA nanostructures with a stable structure and superior mechanical properties .…”

Section: Introductionmentioning

confidence: 99%

Tetrahedral Framework Nucleic Acids Promote Corneal Epithelial Wound Healing in Vitro and in Vivo

Liu

Zhang

et al. 2019

Small

View full text Add to dashboard Cite

Poor post‐traumatic wound healing can affect the normal function of damaged tissues and organs. For example, poor healing of corneal epithelial injuries may lead to permanent visual impairment. It is of great importance to find a therapeutic way to promote wound closure. Tetrahedral framework nucleic acids (tFNAs) are new promising nanomaterials, which can affect the biological behavior of cells. In the experiment, corneal wound healing is used as an example to explore the effect of tFNAs on wound healing. Results show that the proliferation and migration of human corneal epithelial cells are enhanced by exposure to tFNAs in vitro, possibly relevant to the activation of P38 and ERK1/2 signaling pathway. An animal model of corneal alkali burn is established to further identify the facilitation effect of tFNAs on corneal wound healing in vivo. Clinical evaluations and histological analyses show that tFNAs can improve the corneal transparency and accelerate the re‐epithelialization of wounds. Both in vitro and in vivo experiments show that tFNAs can play a positive role in corneal epithelial wound healing.

show abstract

Section: Introductionmentioning

confidence: 99%

Tetrahedral Framework Nucleic Acids Promote Corneal Epithelial Wound Healing in Vitro and in Vivo

Liu

Zhang

et al. 2019

Small

View full text Add to dashboard Cite

show abstract

“…Differential pulsed voltammetry experiments allowed to obtain three distinct peaks for ascorbic acid, dopamine, and uric acid in 50-fold diluted urine. The same three analytes can be distinguished as well by using combinations of different materials, among which we may mention: TmPO 4 and graphene oxide composites [ 34 ], assemblies of positively charged Zn-NiAl-layered double hydroxide with negatively charged reduced graphene oxide [ 35 ], or three dimensional porous structures of MoS 2 and reduced graphene oxide composites [ 36 ]. Instead, if reduced graphene oxide containing Fe 3 O 4 nanoparticles is modified with hydroxypropyl-β-cyclodextrin, ascorbic acid, serotonin, and dopamine can be distinguished using the same electrochemical technique [ 37 ], as demonstrated in serum samples.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical detection of ascorbic acid in artificial sweat using a flexible alginate/CuO-modified electrode

et al. 2020

View full text Add to dashboard Cite

A flexible sensor is presented for electrochemical detection of ascorbic acid in sweat based on single-step modified gold microelectrodes. The modification consists of electrodeposition of alginate membrane with trapped CuO nanoparticles. The electrodes are fabricated at a thin polyimide support and the soft nature of the membrane can withstand mechanical stress beyond requirements for skin monitoring. After characterization of the membrane via optical and scanning electron microscopy and cyclic voltammetry, the oxidative properties of CuO are exploited toward ascorbic acid for amperometric measurement at micromolar levels in neutral buffer and acidic artificial sweat, at ultralow applied potential (− 5 mV vs. Au pseudo-reference electrode). Alternatively, measurement of the horizontal shift of redox peaks by cyclic voltammetry is also possible. Obtaining a limit of detection of 1.97 μM, sensitivity of 0.103 V log (μM)−1 of peak shift, and linear range of 10–150 μM, the effect of possible interfering species present in sweat is minimized, with no observable cross-reaction, thus maintaining a high degree of selectivity despite the absence of enzymes in the fabrication scheme. With a lateral flow approach for sample delivery, repeated measurements show recovery in few seconds, with relative standard deviation of about 20%, which can serve to detect increased loss or absence of vitamin, and yet be improved in future by optimized device designs. This sensor is envisioned as a promising component of wearable devices for e.g. non-invasive monitoring of micronutrient loss through sweat, comprising features of light weight, low cost, and easy fabrication needed for such application.

show abstract

“…Biomolecules play a vital role in metabolism. A 3D-M oS2/rGO/Au composite derived sensor was designed over a glassy carbon electrode and exhibited electrocatalytic activity for ascorbic acid(AA), dopamine (DA), and uric acid (UA) detection (11).…”

Section: Introductionmentioning

confidence: 99%

Semiconducting bacterial biofilm based on graphene-MoS2 template and component dependent gating behavior

Ray

Das²,

Dasgupta³

2020

Preprint

View full text Add to dashboard Cite

In this paper, we report for the first time, the synthesis of a semiconducting biofilm. Photosynthetic bacterial biofilm has been used to weave together MoS2 nanosheets into an adherent film grown on interdigitated electrodes. Liquid-phase exfoliation of bulk MoS2 powder was used to obtain MoS2 nanosheets. A synchronous-fluorescence scan revealed the presence of two emission maxima at 682nm and 715nm for the MoS2 suspension. Such maxima with bandgap energy 1.82 and 1.73 eV corresponded to the single and double layer of MoS2. The presence of such single and multi-layered structures was confirmed by Raman spectroscopy, FTIR studies, and electron microscopy. The current-voltage (I-V) studies of such a bio-nano hybrid revealed the emergence of the gated nature of the current flow. This Schottky diode like behavior, reported earlier for Graphene-biofilm junctions, is also observed in this case. Gating voltage depended on the composition of the biofilm. The semiconductor biofilms, when studied using electrochemical impedance spectroscopy, revealed characteristic Nyquist and Bode plots, suggesting special circuit-equivalence for each film. While Mos2 was marked with stability with respect to variations in RMS voltage and bias voltage, the graphene biofilm was unique by the absence of any Warburg element.

show abstract

In-situ growth of gold nanoparticles on a 3D-network consisting of a MoS2/rGO nanocomposite for simultaneous voltammetric determination of ascorbic acid, dopamine and uric acid

Cited by 70 publications

References 26 publications

Tetrahedral Framework Nucleic Acids Promote Corneal Epithelial Wound Healing in Vitro and in Vivo

Tetrahedral Framework Nucleic Acids Promote Corneal Epithelial Wound Healing in Vitro and in Vivo

Electrochemical detection of ascorbic acid in artificial sweat using a flexible alginate/CuO-modified electrode

Semiconducting bacterial biofilm based on graphene-MoS2 template and component dependent gating behavior

Contact Info

Product

Resources

About