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V S GK, M G M. (Mg,Mn)-dual doping synergism towards luminescence and electrical properties of ZnO/p-Si heterojunction diodes. RSC Adv 2023; 13:32282-32295. [PMID: 37928854 PMCID: PMC10620645 DOI: 10.1039/d3ra06140j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Accepted: 10/26/2023] [Indexed: 11/07/2023] Open
Abstract
In this study, we investigated the impact of divalent dual dopants on ZnO by examining the structural and spectroscopic properties of (Mg,Mn)-doped ZnO thin films deposited using spray deposition technique. Also, we analysed the current-voltage (I-V) characteristics of (Mg,Mn)-doped ZnO/p-Si heterojunctions for potential light-emitting applications. X-ray diffraction of (Mg,Mn)-doped ZnO on glass substrates reveals a compression along the c-axis and a reduction in crystallite size compared to the Mn-doped ZnO film. Moreover, the band gap of Mn-doped ZnO samples increases from 3.29 eV to 3.35 eV with the addition of the Mg dopant. The optical disorder, as estimated through the Urbach tail, increases from 0.33 eV to 0.5 eV with an incremental increase in the concentration of Mg. XPS studies confirmed the substitution of Mn2+ and Mg2+ into Zn2+ in MnMg:ZnO samples. A dominant color of yellow with wavelength 585 nm was recorded, suitable for yellow emitting devices. In the set of fabricated heterojunctions of MnMg:ZnO/Si, 2 at% Mg doped MnZnO film showed a low knee voltage of ∼1.8 V. It was observed that all the MnMg:ZnO/p-Si heterojunctions showed good rectifying behaviour. Various diode parameters were found using transport models such as TE and Norde, wherein a barrier height of ∼0.6-0.7 eV and an ideality factor in the range of ∼1.5-3 was observed. Retention of good crystallinity, slight band gap tuning, apt barrier height, low sheet resistance, and better emission properties were identified for the prepared MgMn:ZnO thin films that find application in optoelectronic devices.
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Affiliation(s)
- Ganesha Krishna V S
- Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education 576104 India
| | - Mahesha M G
- Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education 576104 India
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2
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Recent advance of RNA aptamers and DNAzymes for MicroRNA detection. Biosens Bioelectron 2022; 212:114423. [DOI: 10.1016/j.bios.2022.114423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 04/19/2022] [Accepted: 05/23/2022] [Indexed: 02/02/2023]
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3
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Design of Chopsticks-Shaped Heating Resistors for a Thermal Inkjet: Based on TaN Film. MICROMACHINES 2022; 13:mi13050787. [PMID: 35630256 PMCID: PMC9146670 DOI: 10.3390/mi13050787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 05/07/2022] [Accepted: 05/16/2022] [Indexed: 12/15/2022]
Abstract
Efficient printing frequency is critical for thermal bubble inkjet printing, while the difficulty lies in the structural design and material selection of the heating resistors. In this paper, a TaN film was used as the main material of the heating resistors, and two TaN films were placed in parallel to form the chopsticks-shaped structure. The heating time was divided into two sections, in which 0–0.1 μs was the preheating and 1.2–1.8 μs was the primary heating. At 1.8 μs, the maximum temperature of the Si3N4 film could reach about 1100 °C. At the same time, the SiO2 film was added between the TaN film and Si3N4 film as a buffer layer, which effectively avoided the rupture of the Si3N4 film due to excessive thermal stress. Inside the inkjet print head, the maximum temperature of the chamber reached about 680 °C at 2.5 μs. Due to the high power of the heating resistors, the working time was greatly reduced and the frequency of the inkjet printing was effectively increased. At the interface between the back of the chip and the cartridge, the SiO2 film was used to connect to ensure a timely ink supply. Under the condition of 12 V at 40 kHz, the inkjet chip could print efficiently with 10 nozzles at the same time. The inkjet chip proposed in this paper is not limited to only office printing, but also provides a new reference for 3D printing, cell printing, and vegetable and fruit printing.
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Detection and Real-Time Monitoring of LDL-Cholesterol by Redox-Free Impedimetric Biosensors. BIOCHIP JOURNAL 2022. [DOI: 10.1007/s13206-022-00058-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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5
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Abstract
Printing technology promises a viable solution for the low-cost, rapid, flexible, and mass fabrication of biosensors. Among the vast number of printing techniques, screen printing and inkjet printing have been widely adopted for the fabrication of biosensors. Screen printing provides ease of operation and rapid processing; however, it is bound by the effects of viscous inks, high material waste, and the requirement for masks, to name a few. Inkjet printing, on the other hand, is well suited for mass fabrication that takes advantage of computer-aided design software for pattern modifications. Furthermore, being drop-on-demand, it prevents precious material waste and offers high-resolution patterning. To exploit the features of inkjet printing technology, scientists have been keen to use it for the development of biosensors since 1988. A vast number of fully and partially inkjet-printed biosensors have been developed ever since. This study presents a short introduction on the printing technology used for biosensor fabrication in general, and a brief review of the recent reports related to virus, enzymatic, and non-enzymatic biosensor fabrication, via inkjet printing technology in particular.
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6
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Equivalent circuit model of a non-faradaic impedimetric ZnO nano-crystal biosensor. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2021.116003] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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7
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Sinha K, Chakraborty B, Chaudhury SS, Chaudhuri CR, Chattopadhyay SK, Das Mukhopadhyay C. Selective, Ultra-sensitive and Rapid Detection of Serotonin by Optimized ZnO Nanorod FET Biosensor. IEEE Trans Nanobioscience 2021; 21:65-74. [PMID: 34516379 DOI: 10.1109/tnb.2021.3112534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
BACKGROUND Fluctuation in serotonin (5-HT) level is an essential manifestation of several neurological disorders. In view of such importance, it is necessary to monitor the levels of 5-HT with good sensitivity, selectivity, affordability and low response time. Zinc oxide (ZnO) based field effect transistors (FET) with attributes like minimized noise levels and large on-off ratio are regarded as emerging high performance biosensor platforms. However, their response is significantly non-linear and there has been no appreciable endeavor for improving the non-linearity. METHOD In this paper, we have introduced embedded gate electrode encompassing the channel of the FET which improves the uniformity in electric field line distribution through the electrolyte and proportionately enhances the capture of target biomolecule at ultra low concentrations, thereby increasing the linearity. Further, we have incorporated the optimized parameters of ZnO nanorods reported previously, for rapid and selective detection of 5-HT. RESULTS It has been observed that the fabricated ZnO FET biosensor lowers the detection limit down to 0.1fM which is at least one order of magnitude lower than the existing reports. The sensor also has wide linear range from 0.1fM to 1nM with a detection time of about 20 minutes. CONCLUSION The proposed zinc oxide nanorod-based sensor can be used as an excellent tool for future diagnosis of neurological disorders.
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Ahmed I, Shuai Y, Rafique M, Mahar MA, Larik AS. Tailoring spintronic and opto-electronic characteristics of bilayer AlN through MnO x clusters intercalation; an ab initio study. RSC Adv 2021; 11:15167-15176. [PMID: 35424022 PMCID: PMC8698386 DOI: 10.1039/d1ra01532j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 04/14/2021] [Indexed: 11/21/2022] Open
Abstract
Adopting ab initio density functional theory (DFT) technique, the spintronic and opto-electronic characteristics of MnO x (i.e., Mn, MnO, MnO2, MnO3 and MnO4) clusters intercalated bilayer AlN (BL/AlN) systems are investigated in this paper. In terms of electron transfer, charge transfer occurs from BL/AlN to the MnO x clusters. MnO x clusters intercalation induces magnetic behavior in the non-magnetic AlN system. The splitting of electronic bands occurs, thus producing spintronic trends in the electronic structure of BL/AlN system. Further, MnO x intercalation converts insulating BL/AlN to a half metal/semiconductor material during spin up/down bands depending upon the type of impurity cluster present in its lattice. For instance, Mn, MnO and MnO2 intercalation in BL/AlN produces a half metallic BL/AlN system as surface states are available at the Fermi Energy (E F) level for spin up and down band channels, accordingly. Whereas, MnO3 and MnO4 intercalation produces a conducting BL/AlN system having a 0.5 eV and 0.6 eV band gap during the spin down band channel, respectively. During spin up band channels these systems behave as semiconductors with band gaps of 1.4 eV and 1.2 eV, respectively. In terms of optical characteristics (i.e., absorption coefficient, reflectivity and energy loss spectrum (ELS)), it was found that MnO x intercalation improves the absorption spectrum in the low electron energy range and absorption peaks are observed in the 0-3 eV energy range, which are not present in the absorption spectrum of pure BL/AlN. The static reflectivity parameter of BL/AlN is increased after MnO x intercalation and the ELS parameter obtains significant peak intensities in the 0-2 eV energy range, whereas for pure BL/AlN, ELS contains negligible value in this energy range. Outcomes of this study indicate that, MnO x clusters intercalation in BL/AlN is a suitable technique to tailor its spintronic and opto-electronic trends. Thus, experimental investigation can be carried out on the systems discussed in this work, so as to fabricate practical layered AlN systems that are functional in the field of nano-technology.
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Affiliation(s)
- Irfan Ahmed
- Mehran University of Engineering and Technology, SZAB Campus, Khairpur Mirs' Pakistan
| | - Yong Shuai
- School of Energy Science and Engineering, Harbin Institute of Technology 92 West Dazhi Street Harbin 150001 PR China
| | - Muhammad Rafique
- Mehran University of Engineering and Technology, SZAB Campus, Khairpur Mirs' Pakistan
- School of Energy Science and Engineering, Harbin Institute of Technology 92 West Dazhi Street Harbin 150001 PR China
| | - Mukhtiar Ahmed Mahar
- Mehran University of Engineering and Technology, SZAB Campus, Khairpur Mirs' Pakistan
- Mehran University of Engineering and Technology Jamshoro Sindh Pakistan
| | - Abdul Sattar Larik
- Mehran University of Engineering and Technology, SZAB Campus, Khairpur Mirs' Pakistan
- Mehran University of Engineering and Technology Jamshoro Sindh Pakistan
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Electrochemical impedimetric biosensors, featuring the use of Room Temperature Ionic Liquids (RTILs): Special focus on non-faradaic sensing. Biosens Bioelectron 2020; 177:112940. [PMID: 33444897 DOI: 10.1016/j.bios.2020.112940] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 11/25/2020] [Accepted: 12/24/2020] [Indexed: 01/26/2023]
Abstract
Over the last decade, significant advancements have been made in the field of biosensing technology. With the rising demand for personalized healthcare and health management tools, electrochemical sensors are proving to be reliable solutions; specifically, impedimetric sensors are gaining considerable attention primarily due to their ability to perform label-free sensing. The novel approach of using Room Temperature Ionic Liquids (RTILs) to improve the sensitivity and stability of these detection systems makes long-term continuous sensing feasible towards a wide range of sensing applications, predominantly biosensing. Through this review, we aim to provide an update on current scientific progress in using impedimetric biosensing combined with RTILs for the development of sensitive biosensing platforms. This review also summarizes the latest trends in the field of biosensing and provides an update on the current challenges that remain unsolved.
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10
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Assaifan AK, Al Habis N, Ahmad I, Alshehri NA, Alharbi HF. Scaling-up medical technologies using flexographic printing. Talanta 2020; 219:121236. [PMID: 32887127 DOI: 10.1016/j.talanta.2020.121236] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 05/31/2020] [Accepted: 05/31/2020] [Indexed: 11/17/2022]
Abstract
Medical technologies, such as point-of-care devices and biological and chemical assays which rely on functional materials deposited on top of substrates, are in great demand due to an increase in the prevalence of diseases worldwide. A significant number of these medical technologies are still in their infancy with respect to commercialization because of the high cost, material and complexity of the conventionally available fabrication techniques. As a result, medical technologies, in broad terms, require low cost and mass production fabrication methods in order to overcome the commercialization challenges. Recently, researchers have explored the flexographic printing technique which is widely employed for food packaging and newspaper production. This technique has proved cost-effective, facile, rapid and industrially compatible fabrication technique of functional materials for various applications. In this review, we provide an account of the attempts of flexographic printing made to scale up functional materials on surfaces for biomedical applications. Firstly, we offer justification for demanding high-throughput fabrication techniques. We then present the facile working principle of the flexographic printing and its use in different medical applications, for example chronic disease monitoring devices, colorimetric sensors, electrochemical sensors, assays and drugs. Finally, we discuss challenges of the fabrication technique. The main purpose of this review is to give insights into the usefulness of flexographic printing to the health care industry.
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Affiliation(s)
| | - Nuha Al Habis
- Center of Excellence for Research in Engineering Materials, King Saud University, Riyadh, Saudi Arabia.
| | - Iftikhar Ahmad
- Center of Excellence for Research in Engineering Materials, King Saud University, Riyadh, Saudi Arabia
| | - Naif Ahmed Alshehri
- College of Science Physics Department at Albaha University, Albaha, Saudi Arabia
| | - Hamad F Alharbi
- Mechanical Engineering Department, King Saud University, Riyadh, Saudi Arabia; Center of Excellence for Research in Engineering Materials, King Saud University, Riyadh, Saudi Arabia
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11
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Ibáñez-Redín G, Joshi N, do Nascimento GF, Wilson D, Melendez ME, Carvalho AL, Reis RM, Gonçalves D, Oliveira ON. Determination of p53 biomarker using an electrochemical immunoassay based on layer-by-layer films with NiFe 2O 4 nanoparticles. Mikrochim Acta 2020; 187:619. [PMID: 33083850 DOI: 10.1007/s00604-020-04594-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 10/07/2020] [Indexed: 01/15/2023]
Abstract
A disposable electrochemical immunosensors is presented suitable to detect cancer biomarker p53 using screen-printed carbon electrodes modified with a layer-by-layer (LbL) matrix of carboxylated NiFe2O4 nanoparticles and polyethyleneimine, onto which anti-p53 antibodies were adsorbed. Under optimized conditions, the immunosensors exhibited high surface coverage and high concentration of immobilized antibodies, which allowed for detection of p53 in a wide dynamic range from 1.0 to 10 × 103 pg mL-1, with a limit of detection of 5.0 fg mL-1 at a working potential of 100 mV vs. Ag/AgCl. The immunosensors also exhibited good selectivity with negligible interference upon incubation in complex matrices containing high concentrations of proteins (i.e., fetal bovine serum and cell lysate). The immunosensor performance is among the best reported in the literature for determination of p53, with the additional advantage of being disposable and operating with low-volume solutions.Graphical abstract Schematic representation of immunosensor fabrication depicting the immobilization of specific antibodies against p53 protein onto the surfaces of disposable printed electrodes modified with films of polyethyleneimine and different concentrations of carboxylated magnetic nanoparticles.
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Affiliation(s)
- Gisela Ibáñez-Redín
- São Carlos Institute of Physics, University of São Paulo, SP, 13560-970, São Carlos, Brazil
| | - Nirav Joshi
- São Carlos Institute of Physics, University of São Paulo, SP, 13560-970, São Carlos, Brazil.
| | | | - Deivy Wilson
- São Carlos Institute of Physics, University of São Paulo, SP, 13560-970, São Carlos, Brazil
| | - Matias E Melendez
- Pelé Little Prince Research Institute, Little Prince Complex, PR, 80250-060, Curitiba, Brazil.,Molecular Oncology Research Center, Barretos Cancer Hospital, SP, 14784-400, Barretos, Brazil
| | - André L Carvalho
- Molecular Oncology Research Center, Barretos Cancer Hospital, SP, 14784-400, Barretos, Brazil
| | - Rui Manuel Reis
- Molecular Oncology Research Center, Barretos Cancer Hospital, SP, 14784-400, Barretos, Brazil.,Life and eHealth Sciences Research Institute (ICVS), Medical School, University ofMinho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/ Guimarães, Portugal
| | - Débora Gonçalves
- São Carlos Institute of Physics, University of São Paulo, SP, 13560-970, São Carlos, Brazil
| | - Osvaldo N Oliveira
- São Carlos Institute of Physics, University of São Paulo, SP, 13560-970, São Carlos, Brazil.
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12
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Wang L, Zhang W, Samavat S, Deganello D, Teng KS. Vertically Aligned Graphene Prepared by Photonic Annealing for Ultrasensitive Biosensors. ACS APPLIED MATERIALS & INTERFACES 2020; 12:35328-35336. [PMID: 32657575 DOI: 10.1021/acsami.0c08036] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Graphene exhibits excellent physical, electronic, and chemical properties that are highly desirable for biosensing applications. However, most graphene biosensors are based on graphene lying flat on a substrate and therefore do not utilize its maximum specific surface area for ultrasensitive detection. Herein, we report the novel use of photonic annealing on a flexographically printed graphene-ethyl cellulose composite to produce vertically aligned graphene (VAG) biosensors for ultrasensitive detection of algal toxins in drinking water. These VAG structures, which maximized the specific surface area of graphene, were formed by partial removal of the polymeric binder upon applying intense pulsed light on the printed graphene. A label-free and low-cost VAG biosensor based on a non-faradaic electrochemical impedance spectroscopy technique was fabricated. The biosensor exhibited a limit of detection of 1.2 ng/L for microcystin-LR in local tap water. Such an ultrasensitive VAG biosensor is suitable for low-cost mass production using an integrated roll-to-roll flexographic printing with rapid photonic annealing technique.
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Affiliation(s)
- Lue Wang
- College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, U.K
| | - Wei Zhang
- College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, U.K
| | - Siamak Samavat
- College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, U.K
| | - Davide Deganello
- College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, U.K
| | - Kar Seng Teng
- College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, U.K
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13
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Cagnani GR, Ibáñez-Redín G, Tirich B, Gonçalves D, Balogh DT, Oliveira ON. Fully-printed electrochemical sensors made with flexible screen-printed electrodes modified by roll-to-roll slot-die coating. Biosens Bioelectron 2020; 165:112428. [PMID: 32729544 DOI: 10.1016/j.bios.2020.112428] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 06/12/2020] [Accepted: 07/03/2020] [Indexed: 01/28/2023]
Abstract
The manufacture of sensors using large-scale production techniques, such as roll-to-roll (R2R) processing, may fulfill requirements of low-cost disposable devices. Herein, we report the fabrication of fully-printed electrochemical sensors using screen-printed carbon electrodes coated with carbon black inks through slot-die coating within an R2R process. As a proof of concept, sensors were produced to detect the neurotransmitter dopamine with high reproducibility and low limit of detection (0.09 μmol L-1). Furthermore, fully-printed biosensors made with a tyrosinase-containing ink were used to detect catechol in natural water samples. Since slot-die deposition enables printing enzymes without significant activity loss, the biosensors exhibited high stability over a period of several weeks. Even more important, R2R slot-die coating may be extended to any type of sensors and biosensors with the possibility of large-scale manufacturing.
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Affiliation(s)
- Giovana Rosso Cagnani
- Sao Carlos Institute of Physics, University of Sao Paulo, 13560-970, São Carlos, São Paulo, Brazil.
| | - Gisela Ibáñez-Redín
- Sao Carlos Institute of Physics, University of Sao Paulo, 13560-970, São Carlos, São Paulo, Brazil
| | - Beatriz Tirich
- Sao Carlos Institute of Physics, University of Sao Paulo, 13560-970, São Carlos, São Paulo, Brazil
| | - Débora Gonçalves
- Sao Carlos Institute of Physics, University of Sao Paulo, 13560-970, São Carlos, São Paulo, Brazil
| | - Debora T Balogh
- Sao Carlos Institute of Physics, University of Sao Paulo, 13560-970, São Carlos, São Paulo, Brazil
| | - Osvaldo N Oliveira
- Sao Carlos Institute of Physics, University of Sao Paulo, 13560-970, São Carlos, São Paulo, Brazil
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14
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Abstract
Solution-based printing approaches permit digital designs to be converted into physical objects by depositing materials in a layer-by-layer additive fashion from microscale to nanoscale resolution. The extraordinary adaptability of this technology to different inks and substrates has received substantial interest in the recent literature. In such a context, this review specifically focuses on the realization of inks for the deposition of ZnO, a well-known wide bandgap semiconductor inorganic material showing an impressive number of applications in electronic, optoelectronic, and piezoelectric devices. Herein, we present an updated review of the latest advancements on the ink formulations and printing techniques for ZnO-based nanocrystalline inks, as well as of the major applications which have been demonstrated. The most relevant ink-processing conditions so far explored will be correlated with the resulting film morphologies, showing the possibility to tune the ZnO ink composition to achieve facile, versatile, and scalable fabrication of devices of different natures.
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15
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Kamarudin SF, Mustapha M, Kim JK. Green Strategies to Printed Sensors for Healthcare Applications. POLYM REV 2020. [DOI: 10.1080/15583724.2020.1729180] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Siti Fatimah Kamarudin
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Penang, Malaysia
| | - Mariatti Mustapha
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Penang, Malaysia
| | - Jang-Kyo Kim
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Kowloon, Hong Kong
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Ibáñez-Redín G, Furuta RH, Wilson D, Shimizu FM, Materon EM, Arantes LMRB, Melendez ME, Carvalho AL, Reis RM, Chaur MN, Gonçalves D, Oliveira Jr ON. Screen-printed interdigitated electrodes modified with nanostructured carbon nano-onion films for detecting the cancer biomarker CA19-9. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:1502-1508. [DOI: 10.1016/j.msec.2019.02.065] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 02/01/2019] [Accepted: 02/16/2019] [Indexed: 10/27/2022]
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17
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Zhang W, Wang L, Yang Y, Gaskin P, Teng KS. Recent Advances on Electrochemical Sensors for the Detection of Organic Disinfection Byproducts in Water. ACS Sens 2019; 4:1138-1150. [PMID: 31012308 DOI: 10.1021/acssensors.9b00272] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Irreversible organ damage or even death frequently occurs when humans or animals unknowingly drink contaminated water. Therefore, in many countries drinking water is disinfected to ensure removal of harmful pathogens from drinking water. If upstream water treatment prior to disinfection is not adequate, disinfection byproducts (DBPs) can be formed. DBPs can exist as wide variety of compounds, but up until now, only several typical compounds have drinking water standards attributed to them. However, it is apparent that the range of DBPs present in water can comprise hundreds of compounds, some of which are at high enough concentrations to be toxic or potentially carcinogenic. Hence, it becomes increasingly significant and urgent to develop an accessible, affordable, and durable sensing platform for a broader range and more sensitive detection of DBPs. Compared with well-established laboratory detection techniques, electrochemical sensing has been identified as a promising alternative that will provide rapid, affordable, and sensitive DBP monitoring in remote water sources. Therefore, this Review covers current state-of-the-art development (within the past decade) in electrochemical sensing to detect organic DBPs in water, which covered three major aspects: (1) recognition mechanism, (2) electrodes with signal amplification, and (3) signal read-out techniques. Moreover, comprehensive quality assessments on electrochemical biosensors, including linear detection range, limit of detection (LoD) and recovery, have also been summarized.
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Affiliation(s)
- Wei Zhang
- College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, United Kingdom
- Research Centre for Water Environment Technology, Department of Urban Engineering, The University of Tokyo, Tokyo 113-0033, Japan
| | - Lue Wang
- College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, United Kingdom
| | - Yuesuo Yang
- College of Environment and Recourses, Jilin University, Changchun 130012, China
| | - Paul Gaskin
- Dŵr Cymru Welsh Water, Newport, NP10 8FZ, United Kingdom
| | - Kar Seng Teng
- College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, United Kingdom
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Rong P, Ren S, Yu Q. Fabrications and Applications of ZnO Nanomaterials in Flexible Functional Devices-A Review. Crit Rev Anal Chem 2018; 49:336-349. [DOI: 10.1080/10408347.2018.1531691] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Ping Rong
- School of Materials Science and Engineering, Institute of Graphene at Shaanxi Key Laboratory of Catalysis, Shaanxi University of Technology, Hanzhong, China
| | - Shuai Ren
- School of Materials Science and Engineering, Institute of Graphene at Shaanxi Key Laboratory of Catalysis, Shaanxi University of Technology, Hanzhong, China
| | - Qi Yu
- School of Materials Science and Engineering, Institute of Graphene at Shaanxi Key Laboratory of Catalysis, Shaanxi University of Technology, Hanzhong, China
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Zhang W, Dixon MB, Saint C, Teng KS, Furumai H. Electrochemical Biosensing of Algal Toxins in Water: The Current State-of-the-Art. ACS Sens 2018; 3:1233-1245. [PMID: 29974739 DOI: 10.1021/acssensors.8b00359] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Due to increasing stringency of water legislation and extreme consequences that failure to detect some contaminants in water can involve, there has been a strong interest in developing electrochemical biosensors for algal toxin detection during the past decade, evidenced by literature increasing from 2 journal papers pre-2009 to 24 between 2009 and 2018. In this context, this review has summarized recent progress of successful algal toxin detection in water using electrochemical biosensing techniques. Satisfactory detection recoveries using real environmental water samples and good sensor repeatability and reproducibility have been achieved, along with some excellent limit-of-detection (LOD) reported. Recent electrochemical biosensor literature in algal toxin detection is compared and discussed to cover three major design components: (1) biorecognition elements, (2) electrochemical read-out techniques, and (3) sensor electrodes and signal amplification strategy. The recent development of electrochemical biosensors has provided one more step further toward quick in situ detection of algal toxins in the contamination point of the water source. In the end, we have also critically reviewed the current challenges and research opportunities regarding electrochemical biosensors for algal toxin detection that need to be addressed before they attain commercial viability.
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Affiliation(s)
- Wei Zhang
- Research Centre for Water Environment Technology, Department of Urban Engineering, The University of Tokyo, Tokyo 113-0033, Japan
- School of Natural and Built Environments, University of South Australia, Mawson Lakes, South Australia 5095, Australia
- College of Engineering, Swansea University, Bay Campus, Swansea, Wales SA1 8EN, United Kingdom
| | | | - Christopher Saint
- School of Natural and Built Environments, University of South Australia, Mawson Lakes, South Australia 5095, Australia
| | - Kar Seng Teng
- College of Engineering, Swansea University, Bay Campus, Swansea, Wales SA1 8EN, United Kingdom
| | - Hiroaki Furumai
- Research Centre for Water Environment Technology, Department of Urban Engineering, The University of Tokyo, Tokyo 113-0033, Japan
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Furasova AD, Ivanovski V, Yakovlev AV, Milichko VA, Vinogradov VV, Vinogradov AV. Inkjet fabrication of highly efficient luminescent Eu-doped ZrO 2 nanostructures. NANOSCALE 2017; 9:13069-13078. [PMID: 28837196 DOI: 10.1039/c7nr03175k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We have demonstrated for the first time an inkjet fabrication of highly efficient luminescent structures based on Eu-doped ZrO2 nanocrystals (3.4 ± 0.3 nm), with a refractive index close to the one of the bulk materials. The nanoparticles were synthesised using a nonhydrolytic method in benzyl alcohol where the particles were post treated using acetic acid, leading to the formation of a stable colloid. It was shown that the non-polar methyl group of the acetic acid is responsible for its penetration through the hydrophobic layer all the way through to the surface of the ZrO2, leading to the cleavage of the Zr-OCH2C6H5 bond and the formation of surface acetate species and a concomitant decomposition of the zirconia superlattice. Hereby we show a new and efficient universal ink production through a multi-step process - starting from solvothermal synthesis, dispersion of nanocrystals in water, and adaptation of the rheological parameters of the resulting sols. Eventually, we were able to obtain inks that we used for the production of optical coatings, monolayer luminescent-protected holography and anti-counterfeiting printing. These structures, obtained at room temperature through inkjet printing, present dense xerogel structures with high optical transparency, a high refractive index and more efficient luminescence compared with the non-homogeneous structures produced as a mixture of rare-earth elements and nanocrystals.
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Zeng D, Wang Z, Meng Z, Wang P, San L, Wang W, Aldalbahi A, Li L, Shen J, Mi X. DNA Tetrahedral Nanostructure-Based Electrochemical miRNA Biosensor for Simultaneous Detection of Multiple miRNAs in Pancreatic Carcinoma. ACS APPLIED MATERIALS & INTERFACES 2017; 9:24118-24125. [PMID: 28660759 DOI: 10.1021/acsami.7b05981] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Specific and sensitive biomarker detection is essential to early cancer diagnosis. In this study, we demonstrate an ultrasensitive electrochemical biosensor with the ability to detect multiple pancreatic carcinoma (PC)-related microRNA biomarkers. By employing DNA tetrahedral nanostructure capture probes to enhance the detection sensitivity as well as a disposable 16-channel screen-printed gold electrode (SPGE) detection platform to enhance the detection efficiency, we were able to simultaneously detect four PC-related miRNAs: miRNA21, miRNA155, miRNA196a, and miRNA210. The detection sensitivity reached to as low as 10 fM. We then profiled the serum levels of the four miRNAs for PC patients and healthy individuals with our multiplexing electrochemical biosensor. Through the combined analyses of the four miRNAs, our results showed that PC patients could be discriminated from healthy controls with fairly high sensitivity. This multiplexing PCR-free miRNA detection sensor shows promising applications in early diagnosis of PC disease.
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Affiliation(s)
- Dongdong Zeng
- Shanghai Advanced Research Institute , Chinese Academy of Sciences, Shanghai 201210, China
- Shanghai University of Medicine & Health Sciences , Shanghai 201318, China
| | - Zehua Wang
- Shanghai Advanced Research Institute , Chinese Academy of Sciences, Shanghai 201210, China
| | - Zhiqiang Meng
- Fudan University Shanghai Cancer Center , Shanghai 200032, China
| | - Peng Wang
- Fudan University Shanghai Cancer Center , Shanghai 200032, China
| | - Lili San
- Shanghai Advanced Research Institute , Chinese Academy of Sciences, Shanghai 201210, China
| | - Wei Wang
- Shanghai Pudong New District Zhoupu Hospital , Shanghai 201211, China
| | - Ali Aldalbahi
- Chemistry Department, King Saud University , P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Li Li
- School of Chemistry and Molecular Engineering, East China Normal University , Shanghai 200241, China
| | - Juwen Shen
- School of Chemistry and Molecular Engineering, East China Normal University , Shanghai 200241, China
| | - Xianqiang Mi
- Shanghai Advanced Research Institute , Chinese Academy of Sciences, Shanghai 201210, China
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