1
|
Optical and Material Characteristics of MoS 2/Cu 2O Sensor for Detection of Lung Cancer Cell Types in Hydroplegia. Int J Mol Sci 2022; 23:ijms23094745. [PMID: 35563136 PMCID: PMC9101548 DOI: 10.3390/ijms23094745] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 04/21/2022] [Accepted: 04/22/2022] [Indexed: 02/07/2023] Open
Abstract
In this study, n-type MoS2 monolayer flakes are grown through chemical vapor deposition (CVD), and a p-type Cu2O thin film is grown via electrochemical deposition. The crystal structure of the grown MoS2 flakes is analyzed through transmission electron microscopy. The monolayer structure of the MoS2 flakes is verified with Raman spectroscopy, multiphoton excitation microscopy, atomic force microscopy, and photoluminescence (PL) measurements. After the preliminary processing of the grown MoS2 flakes, the sample is then transferred onto a Cu2O thin film to complete a p-n heterogeneous structure. Data are confirmed via scanning electron microscopy, SHG, and Raman mapping measurements. The luminous energy gap between the two materials is examined through PL measurements. Results reveal that the thickness of the single-layer MoS2 film is 0.7 nm. PL mapping shows a micro signal generated at the 627 nm wavelength, which belongs to the B2 excitons of MoS2 and tends to increase gradually when it approaches 670 nm. Finally, the biosensor is used to detect lung cancer cell types in hydroplegia significantly reducing the current busy procedures and longer waiting time for detection. The results suggest that the fabricated sensor is highly sensitive to the change in the photocurrent with the number of each cell, the linear regression of the three cell types is as high as 99%. By measuring the slope of the photocurrent, we can identify the type of cells and the number of cells.
Collapse
|
2
|
Jiménez-Fiérrez F, González-Sánchez MI, Jiménez-Pérez R, Iniesta J, Valero E. Glucose Biosensor Based on Disposable Activated Carbon Electrodes Modified with Platinum Nanoparticles Electrodeposited on Poly(Azure A). SENSORS 2020; 20:s20164489. [PMID: 32796638 PMCID: PMC7472169 DOI: 10.3390/s20164489] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/07/2020] [Accepted: 08/09/2020] [Indexed: 12/21/2022]
Abstract
Herein, a novel electrochemical glucose biosensor based on glucose oxidase (GOx) immobilized on a surface containing platinum nanoparticles (PtNPs) electrodeposited on poly(Azure A) (PAA) previously electropolymerized on activated screen-printed carbon electrodes (GOx-PtNPs-PAA-aSPCEs) is reported. The resulting electrochemical biosensor was validated towards glucose oxidation in real samples and further electrochemical measurement associated with the generated H2O2. The electrochemical biosensor showed an excellent sensitivity (42.7 μA mM−1 cm−2), limit of detection (7.6 μM), linear range (20 μM–2.3 mM), and good selectivity towards glucose determination. Furthermore, and most importantly, the detection of glucose was performed at a low potential (0.2 V vs. Ag). The high performance of the electrochemical biosensor was explained through surface exploration using field emission SEM, XPS, and impedance measurements. The electrochemical biosensor was successfully applied to glucose quantification in several real samples (commercial juices and a plant cell culture medium), exhibiting a high accuracy when compared with a classical spectrophotometric method. This electrochemical biosensor can be easily prepared and opens up a good alternative in the development of new sensitive glucose sensors.
Collapse
Affiliation(s)
- Francisco Jiménez-Fiérrez
- Department of Physical Chemistry, Higher Technical School of Industrial Engineering, University of Castilla-La Mancha, Campus Universitario s/n, 02071 Albacete, Spain; (F.J.-F.); (M.I.G.-S.); (R.J.-P.)
| | - María Isabel González-Sánchez
- Department of Physical Chemistry, Higher Technical School of Industrial Engineering, University of Castilla-La Mancha, Campus Universitario s/n, 02071 Albacete, Spain; (F.J.-F.); (M.I.G.-S.); (R.J.-P.)
| | - Rebeca Jiménez-Pérez
- Department of Physical Chemistry, Higher Technical School of Industrial Engineering, University of Castilla-La Mancha, Campus Universitario s/n, 02071 Albacete, Spain; (F.J.-F.); (M.I.G.-S.); (R.J.-P.)
| | - Jesús Iniesta
- Department of Physical Chemistry and Institute of Electrochemistry, University of Alicante, 03690 San Vicente del Raspeig, Spain;
| | - Edelmira Valero
- Department of Physical Chemistry, Higher Technical School of Industrial Engineering, University of Castilla-La Mancha, Campus Universitario s/n, 02071 Albacete, Spain; (F.J.-F.); (M.I.G.-S.); (R.J.-P.)
- Correspondence:
| |
Collapse
|
3
|
Jiménez-Pérez R, Almagro L, González-Sánchez MI, Pedreño MÁ, Valero E. Non-enzymatic screen-printed sensor based on PtNPs@polyazure A for the real-time tracking of the H2O2 secreted from living plant cells. Bioelectrochemistry 2020; 134:107526. [DOI: 10.1016/j.bioelechem.2020.107526] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 03/30/2020] [Accepted: 04/01/2020] [Indexed: 10/24/2022]
|
4
|
Borràs-Brull M, Blondeau P, Riu J. The Use of Conducting Polymers for Enhanced Electrochemical Determination of Hydrogen Peroxide. Crit Rev Anal Chem 2020; 51:204-217. [PMID: 31992056 DOI: 10.1080/10408347.2020.1718482] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The role of hydrogen peroxide in a wide range of biological processes has led to a steady increase in research into hydrogen peroxide determination in recent years, and conducting polymers have attracted much interest in electrochemistry as promising materials in this area. We present an overview of electrochemical devices for hydrogen peroxide determination using conducting polymers, either as a target or as a byproduct of redox reactions. We describe different combinations of electrode modifications through the incorporation of conducting polymers as the main component along with other materials or nanomaterials. We critically compare the analytical performances cited and highlight some of the future challenges for the feasible application of such devices.
Collapse
Affiliation(s)
- Marta Borràs-Brull
- Department of Analytical and Organic Chemistry, Universitat Rovira i Virgili, Tarragona, Spain
| | - Pascal Blondeau
- Department of Analytical and Organic Chemistry, Universitat Rovira i Virgili, Tarragona, Spain
| | - Jordi Riu
- Department of Analytical and Organic Chemistry, Universitat Rovira i Virgili, Tarragona, Spain
| |
Collapse
|
5
|
Hopkins J, Fidanovski K, Lauto A, Mawad D. All-Organic Semiconductors for Electrochemical Biosensors: An Overview of Recent Progress in Material Design. Front Bioeng Biotechnol 2019; 7:237. [PMID: 31608275 PMCID: PMC6773807 DOI: 10.3389/fbioe.2019.00237] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 09/11/2019] [Indexed: 12/20/2022] Open
Abstract
Organic semiconductors remain of major interest in the field of bioelectrochemistry for their versatility in chemical and electrochemical behavior. These materials have been tailored using organic synthesis for use in cell stimulation, sustainable energy production, and in biosensors. Recent progress in the field of fully organic semiconductor biosensors is outlined in this review, with a particular emphasis on the synthetic tailoring of these semiconductors for their intended application. Biosensors ultimately function on the basis of a physical, optical or electrochemical change which occurs in the active material when it encounters the target analyte. Electrochemical biosensors are becoming increasingly popular among organic semiconductor biosensors, owing to their good detection performances, and simple operation. The analyte either interacts directly with the semiconductor material in a redox process or undergoes a redox process with a moiety such as an enzyme attached to the semiconductor material. The electrochemical signal is then transduced through the semiconductor material. The most recent examples of organic semiconductor biosensors are discussed here with reference to the material design of polymers with semiconducting backbones, specifically conjugated polymers, and polymer semiconducting dyes. We conclude that direct interaction between the analyte and the semiconducting material is generally more sensitive and cost effective, despite being currently limited by the need to identify, and synthesize selective sensing functionalities. It is also worth noting the potential roles of highly-sensitive, organic transistor devices and small molecule semiconductors, such as the photochromic and redox active molecule spiropyran, as polymer pendant groups in future biosensor designs.
Collapse
Affiliation(s)
- Jonathan Hopkins
- School of Materials Science and Engineering, University of New South Wales Sydney, Sydney, NSW, Australia.,Centre for Advanced Macromolecular Design, University of New South Wales Sydney, Sydney, NSW, Australia
| | - Kristina Fidanovski
- School of Materials Science and Engineering, University of New South Wales Sydney, Sydney, NSW, Australia.,Centre for Advanced Macromolecular Design, University of New South Wales Sydney, Sydney, NSW, Australia
| | - Antonio Lauto
- School of Science, Western Sydney University, Penrith, NSW, Australia
| | - Damia Mawad
- School of Materials Science and Engineering, University of New South Wales Sydney, Sydney, NSW, Australia.,Centre for Advanced Macromolecular Design, University of New South Wales Sydney, Sydney, NSW, Australia.,Australian Centre for NanoMedicine, ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of New South Wales Sydney, Sydney, NSW, Australia
| |
Collapse
|