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Nanomaterials Based Sensors and the Application

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A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Chemical Sensors".

Deadline for manuscript submissions: closed (15 July 2020) | Viewed by 14158

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Special Issue Editor

Prof. Dr. José Manuel Costa Fernández

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Guest Editor

Department of Physical and Analytical Chemistry, University of Oviedo, 33006 Oviedo, Spain
Interests: analytical nanotechnology; biosensors; photoluminescence; analytical chemistry; separation techniques; clinical analysis; environmental analysis; mass spectrometry
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nanomaterials have already demonstrated their suitability as improved sensing elements for sensing and biosensing applications. The smart use of such nano-objects result in noticeably improved sensing performances including increased sensitivities and lowered detection limits. The high specific surface of nanomaterials enable the possibility of immobilizing greater quantities of receptor units at reduced volumes. Additionally, the unique size-dependent physical and chemical properties of nanomaterials make them superior transduction elements. Among the extensive number of nanoparticles available, inorganic nanoparticles, semiconductor quantum dots, polymer nanoparticles, carbon-based nanomaterials or magnetic nanoparticles have been intensively employed in the development of novel (bio)sensors.

The Special Issue intends to collect contributions devoted to developing sensing systems based on the use of nanomaterials. Incorporation of nanoparticles in sensing schemes not only require specific methods of synthesis and proper characterization techniques, but additionally efficient nanomaterial functionalization is one of the key factors required before developing a reliable sensor. Many often, the specific recognition event in sensing devices is not directly detectable by the transductor. The intrinsic advantageous physico-chemical properties of some nanomaterials can clearly contribute to the development of novel “label free” transduction methods or provide significant analytical signal amplifications when used as labels.

Applications of nanomaterials based sensors for detection and/or screening of molecules of relevance in environment, industrial process control, food control and clinical diagnostics are also welcome.

Potential topics cover a wide range of research fields related to the fundamental and applied aspects for the sensor nanomaterials and their novel functionalities and applications, and include but are not limited to the following:

development of nanomaterials for sensing and biosensing
strategies of functionalization of nanomaterials for sensing purposes
characterization of nanomaterials used in sensors
development of hybrid sensing nanomaterials
applications of nanomaterials in sensing
sensing of nanomaterials in environmental and biological media

Prof. Dr. José Manuel Costa Fernández
Guest Editor

Manuscript Submission Information

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Keywords

Sensors
Biosensors
Nanosensors
Engineered nanomaterials for sensors and biosensors
Nanomaterials functionalization
Nanomaterials characterisation
Applications of sensors based on nanomaterials

Published Papers (4 papers)

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Research

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13 pages, 12819 KiB

Open AccessArticle

CeO₂-Based Two-Dimensional Layered Nanocomposites Derived from a Metal–Organic Framework for Selective Electrochemical Dopamine Sensors

by Chengjie Ge, Rajendran Ramachandran and Fei Wang

Sensors 2020, 20(17), 4880; https://0-doi-org.brum.beds.ac.uk/10.3390/s20174880 - 28 Aug 2020

Cited by 20 | Viewed by 4394

Abstract

In this work, we demonstrate the incorporation of two-dimensional (2D) layered materials into a metal–organic framework (MOF) derived from one-dimensional (1D) cerium oxide (CeO₂) for the electrochemical detection of dopamine. Ce-MOF was employed as a sacrificial template for preparing CeO₂ with 2D materials by the pyrolysis process. The influence of the pyrolysis temperature was studied to achieve a better crystal structure of CeO₂. Siloxene improved the dopamine sensing performance of CeO₂ compared with graphitic carbon nitride (g-C₃N₄) due to the basal plane surface oxygen and hydroxyl groups of 2D siloxene. Under optimal conditions, the fabricated CeO₂/siloxene electrode exhibited a detection limit of 0.292 μM, with a linear range from 0.292 μM to 7.8 μM. This work provides a novel scheme for designing the CeO₂ material with siloxene for excellent dopamine sensors, which could be extended towards other biosensing applications. Full article

(This article belongs to the Special Issue Nanomaterials Based Sensors and the Application)

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10 pages, 2069 KiB

Open AccessArticle

Investigation of the Impact of Environmental Parameters on Breath Frequency Measurement by a Textile Sensor

by Ewa Skrzetuska and Jarosław Wojciechowski

Sensors 2020, 20(4), 1179; https://0-doi-org.brum.beds.ac.uk/10.3390/s20041179 - 21 Feb 2020

Cited by 7 | Viewed by 2141

Abstract

The aim of this work was to develop sensors that enable the monitoring of respiratory frequencies and will be competitive at a global level in replacing conventional electronic sensors based on rigid and uncomfortable materials. The preliminary work carried out showed the real possibility of creating flat fibrous products containing carbon nanotubes with sensory properties. Bearing in mind the production of a textile deformation sensor, textile materials with high elasticity and deformation reversibility were used in the preliminary studies. The authors assumed that it would be possible to conduct registration associated with the measurement of pneumography continuously in various atmospheric conditions and with varying intensification of human physical activity. The conducted experiment allows us to state that the resistance at the level of 10 kΩ is sufficient to collect results of breathing frequency at rest and after physical effort. Full article

(This article belongs to the Special Issue Nanomaterials Based Sensors and the Application)

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Other

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13 pages, 2766 KiB

Open AccessLetter

N-Doped Reduced Graphene Oxide/Gold Nanoparticles Composite as an Improved Sensing Platform for Simultaneous Detection of Dopamine, Ascorbic Acid, and Uric Acid

by Daria Minta, Zoraida González, Piotr Wiench, Stanisław Gryglewicz and Grażyna Gryglewicz

Sensors 2020, 20(16), 4427; https://0-doi-org.brum.beds.ac.uk/10.3390/s20164427 - 07 Aug 2020

Cited by 24 | Viewed by 3664

Abstract

Gold nanoparticles (AuNPs) were homogeneously electrodeposited on nitrogen-doped reduced graphene oxide (N-rGO) to modify a glassy carbon electrode (GCE/N-rGO-Au) in order to improve the simultaneous detection of dopamine (DA), ascorbic acid (AA), and uric acid (UA). N-rGO was prepared by the hydrothermal treatment of graphene oxide (GO) and urea at 180 °C for 12 h. AuNPs were subsequently electrodeposited onto the surface of GCE/N-rGO using 1 mM HAuCl₄ solution. The morphology and chemical composition of the synthesized materials were characterized by field-emission scanning electron microscopy and X-ray photoelectron spectroscopy. The electrochemical performance of the modified electrodes was investigated through cyclic voltammetry and differential pulse voltammetry measurements. Compared to GCE/rGO-Au, GCE/N-rGO-Au exhibited better electrochemical performance towards the simultaneous detection of the three analytes due to the more homogeneous distribution of the metallic nanoparticles as a result of more efficient anchoring on the N-doped areas of the graphene structure. The GCE/N-rGO-Au-based sensor operated in a wide linear range of DA (3–100 µM), AA (550–1500 µM), and UA (20–1000 µM) concentrations with a detection limit of 2.4, 58, and 8.7 µM, respectively, and exhibited satisfactory peak potential separation values of 0.34 V (AA-DA), 0.20 V, (DA-UA) and 0.54 V (AA-UA). Remarkably, GCE/N-rGO-Au showed a very low detection limit of 385 nM towards DA, not being susceptible to interference, and maintained 90% of its initial electrochemical signal after one month, indicating an excellent long-term stability. Full article

(This article belongs to the Special Issue Nanomaterials Based Sensors and the Application)

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13 pages, 7664 KiB

Open AccessLetter

Strain and Temperature Sensitivities Along with Mechanical Properties of CNT Buckypaper Sensors

by Shiuh-Chuan Her and Wei-Chun Hsu

Sensors 2020, 20(11), 3067; https://0-doi-org.brum.beds.ac.uk/10.3390/s20113067 - 28 May 2020

Cited by 9 | Viewed by 2816

Abstract

In this work, buckypaper composed of multi-walled carbon nanotubes (MWCNT) was prepared through a vacuum filtration process. The effect of MWCNT aspect ratio on the buckypaper performance was investigated. The freestanding and highly flexible buckypaper can be used as a sensor to attach on a complex surface monitoring the strain and temperature at the critical area. The mechanical properties of the buckypaper were examined using the tensile and nanoindentation tests. The strain and temperature sensitivities of the buckypaper were evaluated through the four-point bending and thermal chamber tests, respectively. In addition, the microstructure and thermal stability of the buckypaper were studied by scanning electron microscopy (SEM) and thermogravimetric analyzer (TGA), respectively. Experimental results showed that the mechanical properties such as Young’s modulus, tensile strength, fracture strain, and hardness of the buckypaper made of high aspect ratio MWCNTs were significantly superior to the buckypaper consisted of low aspect ratio MWCNTs, while the strain and temperature sensitivities of the buckypaper composed of low aspect ratio MWCNTs were better than that of the buckypaper made of high aspect ratio MWCNTs. Full article

(This article belongs to the Special Issue Nanomaterials Based Sensors and the Application)

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