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Olariu MA, Filip TA, Peptu CA, Turcan I. Screen-printed interdigitated microelectrodes employment in dielectrophoretic manipulation of MWCNTs. Mikrochim Acta 2023; 190:453. [PMID: 37882907 DOI: 10.1007/s00604-023-06023-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 09/29/2023] [Indexed: 10/27/2023]
Abstract
As key enablers of Industry 4.0 and Internet of Things, sensors are among the first devices which are to encounter fast physical transformation (from rigid to flexible) as of large-scale utilization of printing technologies. In order to step-up this process, adaptation of conventional fabrication technologies (based on metallization) employed in sensors' development should be tested and demonstrated. Within this paper, we are reporting the functionality of dielectrophoresis (DEP) for electromanipulation of multi-walled carbon nanotubes (MWCNTs) as sensing element, at the level of printed interdigitated electrodes. First, we present the flatbed screen-printed process of interdigitated microelectrodes on flexible substrate with tailored geometries employed afterwards for generating convenient dielectrophoretic forces of optimal magnitude and frequency for trapping MWCNTs. Successful dielectrophoresis operability of MWCNTs across silver-based screen-printed μIDE (interdigitated microelectrodes) provided with electrode gaps of ≈ 150 μm was validated and suitable values of the signal frequencies for avoiding parasitic electrokinetic phenomena (AC electro-osmosis, electrothermal effect) occurring simultaneously with DEP were identified. Time-dependent effect of DEP over MWCNTs bridges formation is discussed, as well as voltage magnitude contribution.
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Affiliation(s)
- Marius Andrei Olariu
- Department of Electrical Measurements and Materials, Faculty of Electrical Engineering and Information Technology, Gheorghe Asachi Technical University of Iasi, 21-23 Profesor Dimitrie Mangeron Blvd., 700050, Iasi, Romania
| | - Tudor Alexandru Filip
- Department of Electrical Measurements and Materials, Faculty of Electrical Engineering and Information Technology, Gheorghe Asachi Technical University of Iasi, 21-23 Profesor Dimitrie Mangeron Blvd., 700050, Iasi, Romania
| | - Catalina Anisoara Peptu
- Department of Natural and Synthetic Polymers, Faculty of Chemical Engineering and Environmental Protection, Gheorghe Asachi" Technical University of Iasi, 71, Prof. Dr. Docent Dimitrie Mangeron Street, 700050, Iasi, Romania
| | - Ina Turcan
- Department of Electrical Measurements and Materials, Faculty of Electrical Engineering and Information Technology, Gheorghe Asachi Technical University of Iasi, 21-23 Profesor Dimitrie Mangeron Blvd., 700050, Iasi, Romania.
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Aldawsari AM, Alkhathami ND, Al-Bonayan AM, Alessa H, Alkhamis KM, Abumelha HM, El-Metwaly NM. Preparation of novel authentication film by screen-printing of anthocyanin biomolecular extract: Thermochromism and vapochromism. LUMINESCENCE 2023; 38:613-624. [PMID: 36929638 DOI: 10.1002/bio.4487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 03/13/2023] [Accepted: 03/13/2023] [Indexed: 03/18/2023]
Abstract
Novel thermochromic and vapochromic paper substrates were prepared via screen-printing with anthocyanin extract in the presence of ferrous sulphate mordant, resulting in multi-stimuli responsive colorimetric paper sheets. Environmentally-friendly anthocyanin extract was obtained from red-cabbage (Brassica oleracea var. capitata L.) to function as spectroscopic probe in coordination with ferrous sulphate mordant. Pink anthocyanin/resin nanocomposite films immobilized onto paper surface were developed by well-dispersion of anthocyanin extract as a colorimetric probe in a binding agent without agglomeration. As demonstrated by CIE colorimetric studies, the pink (λmax = 418 nm) film deposited onto paper surface turns greenish-yellow (λmax = 552 nm) upon heating from 25 °C to 75 °C, demonstrating new thermochromic film for anticounterfeiting applications. The thermochromic effects were investigated at different concentrations of the anthocyanin extract. Upon exposure to NH3(g) , the color of the anthocyanin-printed sheets changes rapidly from pink to greenish-yellow, and then immediately returns to pink after taking the gaseous ammonia stimulus away, demonstrating vapochromic effect. The current sensor strip showed a detection limit for NH3(aq) in the range of 50-300 ppm. Both thermochromism and vapochromism showed high reversibility without fatigue. In addition to studying the rheological properties of the prepared composites, the morphological and mechanical properties of the printed cellulose substrates were also studied.
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Affiliation(s)
- Afrah M Aldawsari
- Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah, Saudi Arabia.,King abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
| | - Nada D Alkhathami
- Department of Chemistry, College of Science, University of Tabuk, Tabuk, Saudi Arabia
| | - Ameena M Al-Bonayan
- Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Hussain Alessa
- Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Kholood M Alkhamis
- Department of Chemistry, College of Science, University of Tabuk, Tabuk, Saudi Arabia
| | - Hana M Abumelha
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Nashwa M El-Metwaly
- Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah, Saudi Arabia.,Department of Chemistry, Faculty of Science, Mansoura University, Mansoura, Egypt
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3
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Plohl O, Kokol V, Filipić A, Fric K, Kogovšek P, Fratnik ZP, Vesel A, Kurečič M, Robič J, Gradišnik L, Maver U, Zemljič LF. Screen-printing of chitosan and cationised cellulose nanofibril coatings for integration into functional face masks with potential antiviral activity. Int J Biol Macromol 2023; 236:123951. [PMID: 36898451 PMCID: PMC9995302 DOI: 10.1016/j.ijbiomac.2023.123951] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 02/21/2023] [Accepted: 03/03/2023] [Indexed: 03/11/2023]
Abstract
Masks proved to be necessary protective measure during the COVID-19 pandemic, but they provided a physical barrier rather than inactivating viruses, increasing the risk of cross-infection. In this study, high-molecular weight chitosan and cationised cellulose nanofibrils were screen-printed individually or as a mixture onto the inner surface of the first polypropylene (PP) layer. First, biopolymers were evaluated by various physicochemical methods for their suitability for screen-printing and antiviral activity. Second, the effect of the coatings was evaluated by analysing the morphology, surface chemistry, charge of the modified PP layer, air permeability, water-vapour retention, add-on, contact angle, antiviral activity against the model virus phi6 and cytotoxicity. Finally, the functional PP layers were integrated into face masks, and resulting masks were tested for wettability, air permeability, and viral filtration efficiency (VFE). Air permeability was reduced for modified PP layers (43 % reduction for kat-CNF) and face masks (52 % reduction of kat-CNF layer). The antiviral potential of the modified PP layers against phi6 showed inhibition of 0.08 to 0.97 log (pH 7.5) and cytotoxicity assay showed cell viability above 70 %. VFE of the masks remained the same (~99.9 %), even after applying the biopolymers, confirming that these masks provided high level of protection against viruses.
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Affiliation(s)
- Olivija Plohl
- University of Maribor, Faculty of Mechanical Engineering, Smetanova ulica 17, 2000 Maribor, Slovenia.
| | - Vanja Kokol
- University of Maribor, Faculty of Mechanical Engineering, Smetanova ulica 17, 2000 Maribor, Slovenia.
| | - Arijana Filipić
- National Institute of Biology, Department of Biotechnology and Systems Biology, Večna pot 111, 1000 Ljubljana, Slovenia.
| | - Katja Fric
- National Institute of Biology, Department of Biotechnology and Systems Biology, Večna pot 111, 1000 Ljubljana, Slovenia.
| | - Polona Kogovšek
- National Institute of Biology, Department of Biotechnology and Systems Biology, Večna pot 111, 1000 Ljubljana, Slovenia.
| | - Zdenka Peršin Fratnik
- University of Maribor, Faculty of Mechanical Engineering, Smetanova ulica 17, 2000 Maribor, Slovenia.
| | - Alenka Vesel
- Jožef Stefan Institute, Department of Surface Engineering and Optoelectronics, Teslova 30, 1000 Ljubljana, Slovenia.
| | - Manja Kurečič
- University of Maribor, Faculty of Mechanical Engineering, Smetanova ulica 17, 2000 Maribor, Slovenia.
| | - Jure Robič
- Omega Air d.o.o Ljubljana, Cesta Dolomitskega odreda 10, 1000 Ljubljana, Slovenia.
| | - Lidija Gradišnik
- University of Maribor, Faculty of Medicine, Institute of Biomedical Sciences, Taborska ulica 8, 2000 Maribor, Slovenia.
| | - Uroš Maver
- University of Maribor, Faculty of Medicine, Institute of Biomedical Sciences, Taborska ulica 8, 2000 Maribor, Slovenia.
| | - Lidija Fras Zemljič
- University of Maribor, Faculty of Mechanical Engineering, Smetanova ulica 17, 2000 Maribor, Slovenia.
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Moccia M, Caratelli V, Cinti S, Pede B, Avitabile C, Saviano M, Imbriani AL, Moscone D, Arduini F. Paper-based electrochemical peptide nucleic acid (PNA) biosensor for detection of miRNA-492: a pancreatic ductal adenocarcinoma biomarker. Biosens Bioelectron 2020; 165:112371. [PMID: 32729503 DOI: 10.1016/j.bios.2020.112371] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 05/28/2020] [Accepted: 06/06/2020] [Indexed: 12/29/2022]
Abstract
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 of cancer rely on fast progress (i.e. 14 months from T1 to a T4 stage), nonspecific symptoms with delay in diagnosis, and the absence of effective screening strategies. To address the lack of early diagnosis, we report a cost-effective paper-based biosensor for the detection of miRNA-492, which is recognised as a biomarker for pancreatic ductal adenocarcinoma. To design a miniaturised, sensitive, and robust paper-based platform, an electrochemical sensor was screen-printed on office paper previously wax-patterned via wax-printing technique. The paper-based sensor was then engineered with a novel and highly specific peptide nucleic acid (PNA) as the recognition element. The formation of PNA/miRNA-492 adduct was evaluated by monitoring the interaction between the positively charged ruthenium (III) hexamine with uncharged PNA and/or negatively charged PNA/miRNA-492 duplex by differential pulse voltammetry. The paper-based biosensor provided a linear range up to 100 nM, with a LOD of 6 nM. Excellent selectivity towards one- and two-base mismatches (1MM, 2MM) or scrambled (SCR) sequences was highlighted and the applicability for biomedical analyses was demonstrated, measuring miRNA-492 in undiluted serum samples.
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Affiliation(s)
- Maria Moccia
- Institute of Crystallography, National Research Council, Department of Chemical Sciences and Materials Technology, Via G. Amendola 122/O, 70126, Bari, Italy.
| | - Veronica Caratelli
- Tor Vergata University, Department of Chemical Science and Technologies, Via Della Ricerca Scientifica, 00133, Rome, Italy
| | - Stefano Cinti
- University of Naples "Federico II", Department of Pharmacy, Via Domenico Montesano 49, 80131, Naples, Italy
| | - Biagio Pede
- Tor Vergata University, Department of Chemical Science and Technologies, Via Della Ricerca Scientifica, 00133, Rome, Italy
| | - Concetta Avitabile
- Institute of Crystallography, National Research Council, Department of Chemical Sciences and Materials Technology, Via G. Amendola 122/O, 70126, Bari, Italy
| | - Michele Saviano
- Institute of Crystallography, National Research Council, Department of Chemical Sciences and Materials Technology, Via G. Amendola 122/O, 70126, Bari, Italy
| | - Anna Lisa Imbriani
- Biochemical Systems International S.p.A. Loc, Palazzo del Pero, 23, 52100, Arezzo, Italy
| | - Danila Moscone
- Tor Vergata University, Department of Chemical Science and Technologies, Via Della Ricerca Scientifica, 00133, Rome, Italy
| | - Fabiana Arduini
- Tor Vergata University, Department of Chemical Science and Technologies, Via Della Ricerca Scientifica, 00133, Rome, Italy; SENSE4MED, Via Renato Rascel 30, 00133, Rome, Italy.
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Jiao S, Sun Z, Zhou Y, Li F, Wen J, Chen Y, Du X, Li L, Liu Y. Surface-Coated Thermally Expandable Microspheres with a Composite of Polydisperse Graphene Oxide Sheets. Chem Asian J 2019; 14:4328-4336. [PMID: 31650678 DOI: 10.1002/asia.201901233] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 10/03/2019] [Indexed: 12/21/2022]
Abstract
Surface-modified thermally expandable microcapsules (TEMs) hold potential for applications in various fields. In this work, we discussed the possible surface coating mechanism and reported the properties of TEMs coated with polyaniline (PANI) and polydisperse graphene oxide sheets (ionic liquid-graphene oxide hybrid nanomaterial (ILs-GO)). The surface coating of PANI/ ILs-GO increased the corresponding particle size and its distribution range. The morphologies analyzed by scanning electron microscopy indicated that no interfacial gap was observed between the microspheres ink and substrate layer during the substrate application. The thermal properties were determined by thermogravimetric and differential thermal analyses. The addition of ILs-GO to the polyaniline coating significantly improved the thermal expansion and thermal conductivity of the microcapsules. The evaporation of hexane present in the core of TEMs was not prevented by the coating of PANI/ ILs-GO. The printing application of TEMs showed excellent adaptability to various flexible substrates with great 3D appearance. By incorporating a flame retardant agent into TEMs coated by PANI/ILs-GO, finally, these TEMs also demonstrated a great flame retardant ability. We expect that these TEM-coated PANI/ ILs-GO are likely to have the potential to improve the functional properties for various applications.
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Affiliation(s)
- Shouzheng Jiao
- Beijing Engineering Research Center of Printed Electronics, Beijing Institute of Graphic Communication, Beijing, 102600, China
| | - Zhicheng Sun
- Beijing Engineering Research Center of Printed Electronics, Beijing Institute of Graphic Communication, Beijing, 102600, China
| | - Yang Zhou
- School of Chemical Engineering and Technology, Hainan University, Haikou, Hainan, 570228, China
| | - Furong Li
- Beijing Engineering Research Center of Printed Electronics, Beijing Institute of Graphic Communication, Beijing, 102600, China
| | - Jinyue Wen
- Beijing Engineering Research Center of Printed Electronics, Beijing Institute of Graphic Communication, Beijing, 102600, China
| | - Yinjie Chen
- Beijing Engineering Research Center of Printed Electronics, Beijing Institute of Graphic Communication, Beijing, 102600, China
| | - Xiaoyang Du
- Beijing Engineering Research Center of Printed Electronics, Beijing Institute of Graphic Communication, Beijing, 102600, China
| | - Luhai Li
- Beijing Engineering Research Center of Printed Electronics, Beijing Institute of Graphic Communication, Beijing, 102600, China
| | - Yuanyuan Liu
- School of Chemical Engineering and Technology, Hainan University, Haikou, Hainan, 570228, China
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6
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Westmacott KL, Crew AP, Doran O, Hart JP. Novel, rapid, low-cost screen-printed (bio)sensors for the direct analysis of boar taint compounds androstenone and skatole in porcine adipose tissue: Comparison with a high-resolution gas chromatographic method. Biosens Bioelectron 2019; 150:111837. [PMID: 31735622 DOI: 10.1016/j.bios.2019.111837] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 10/21/2019] [Accepted: 10/31/2019] [Indexed: 10/25/2022]
Abstract
This is the first report on the fabrication, characterisation and application of an electrochemical (bio)sensor system for the simultaneous measurement of skatole and androstenone. A biosensor for androstenone was fabricated using a Meldola's Blue modified SPCE (MB-SPCE) by depositing NADH and the enzyme 3α-hydroxysteroid dehydrogenase onto the MB-SPCE surface; samples of adipose tissue were analysed using the biosensors in conjunction with chronoamperometry. Cyclic voltammetry was used to investigate the electrochemical behaviour of skatole at a screen-printed carbon electrode (SPCE vs. Ag/AgCl). An oxidation peak was observed around +0.55 V (vs. Ag/AgCl) and differential pulse voltammetry was applied for quantification of skatole in adipose tissue (in-situ). Quantitative analysis was achieved using calibration plots obtained from fortified meat samples. The concentrations obtained by the electrochemical and gas chromatographic (GC) methods demonstrated a good positive correlation. The (bio)sensor system completed both measurements within 60 s, as compared to several hours for GC, and at a considerably reduced cost and complexity. Consequently, the novel (bio)sensor system should have applications for analysis of carcasses on the abattoir processing line.
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Affiliation(s)
- K L Westmacott
- Centre for Research in Biosciences, Faculty of Health and Applied Sciences, University of the West England, Frenchay Campus, Coldharbour Lane, Bristol, BS16 1QY, UK
| | - A P Crew
- Centre for Research in Biosciences, Faculty of Health and Applied Sciences, University of the West England, Frenchay Campus, Coldharbour Lane, Bristol, BS16 1QY, UK
| | - O Doran
- Centre for Research in Biosciences, Faculty of Health and Applied Sciences, University of the West England, Frenchay Campus, Coldharbour Lane, Bristol, BS16 1QY, UK
| | - J P Hart
- Centre for Research in Biosciences, Faculty of Health and Applied Sciences, University of the West England, Frenchay Campus, Coldharbour Lane, Bristol, BS16 1QY, UK.
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Wei B, Mao K, Liu N, Zhang M, Yang Z. Graphene nanocomposites modified electrochemical aptamer sensor for rapid and highly sensitive detection of prostate specific antigen. Biosens Bioelectron 2018; 121:41-6. [PMID: 30196046 DOI: 10.1016/j.bios.2018.08.067] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 08/16/2018] [Accepted: 08/27/2018] [Indexed: 01/04/2023]
Abstract
Prostate specific antigen (PSA) is a widely used marker for the diagnosis of prostate cancer, and the increasing attention has been attracted on the development of rapid assay using biosensing technology. However, it remains challenging for the sensitive and selective detection of PSA in clinical samples. Here, we report a label-free microfluidic paper-based analytical device for highly sensitive electrochemical detection of PSA. The paper device was fabricated with wax printing to generate hydrophobic and hydrophilic layers for the construction of microfluidic channel, followed by screen-printing of three electrodes including working, counter and reference electrode. Gold nanoparticles (AuNPs)/reduced graphene oxide (rGO)/thionine (THI) nano composites were synthesized and characterized, which were coated onto working electrodes for the immobilization of DNA aptamer probe. THI servers as the electrochemical mediator to transduce the biological recognition between DNA aptamer and PSA, and the excellent conductivity of AuNPs and rGO also play a significant role of electron transfer, leading to a sensitive detection for PSA, able to detect PSA as low as 10 pg mL-1, with a linear range from 0.05 to 200 ng mL-1. We demonstrated that our electrochemical sensor for the detection of clinical serum samples, indicating that our sensor would provide a new platform for low cost, sensitive and point-of-care diagnosis of prostate cancer.
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8
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Zhang B, Huang L, Tang M, Hunter KW, Feng Y, Sun Q, Wang J, Chen G. A nickel nanoparticle/nafion-graphene oxide modified screen-printed electrode for amperometric determination of chemical oxygen demand. Mikrochim Acta 2018; 185:385. [PMID: 30043240 DOI: 10.1007/s00604-018-2917-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 07/13/2018] [Indexed: 12/01/2022]
Abstract
A nickel nanoparticle/nafion-graphene oxide (NiNP/Nf-GO) modified screen-printed electrode (SPE) was developed for rapid and environmentally friendly electrochemical determination of chemical oxygen demand (COD). The morphology and the electrochemical performance of the SPEs with different surface modifications were investigated by scanning electron microscopy, electrochemical impedance spectroscopy, amperometry, and cyclic voltammetry, respectively. Interestingly, incorporation of graphene oxide as supporting materials to the NiNP/Nf-GO modified SPE enables high catalyst loading and electrode contact, leading to excellent electrocatalytic oxidation ability. A flow detection system was constructed based the newly designed NiNP/Nf-GO modified SPE with USB connection, a 3D-printed thin-layer flow cell (TLFC), and a peristaltic pump. The flow detection system showed an excellent performance for COD analysis with a linear detection range of 0.1~400 mg L-1 and a lower detection limit of 0.05 mg L-1 with an oxidation potential of 0.45 V. The system was further applied to determine the COD in surface water samples. The results were consistent with those obtained by using the standard method (ISO 6060). Graphical abstract A novel nickel nanoparticle/nafion-graphene oxide (NiNP/Nf-GO) modified screen-printed electrode (SPE) with excellent electrocatalytic oxidation ability was designed and fabricated. This electrode with USB connection was applied in a flow detection system equipped with a 3D-printed thin-layer flow cell and a peristaltic pump for environmentally friendly electrochemical determination of chemical oxygen demand.
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Affiliation(s)
- Baojian Zhang
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 210009, China
| | - Liming Huang
- Department of Microbiology and Immunology, School of Medicine, University of Nevada, Reno, NV, 89557, USA.
| | - Meihua Tang
- School of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 210009, China
| | - Kenneth W Hunter
- Department of Microbiology and Immunology, School of Medicine, University of Nevada, Reno, NV, 89557, USA
| | - Yan Feng
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 210009, China
| | - Qianwen Sun
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 210009, China
| | - Jikui Wang
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 210009, China
| | - Guosong Chen
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 210009, China.
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Wang Y, Luo J, Liu J, Li X, Kong Z, Jin H, Cai X. Electrochemical integrated paper-based immunosensor modified with multi-walled carbon nanotubes nanocomposites for point-of-care testing of 17β-estradiol. Biosens Bioelectron 2018; 107:47-53. [PMID: 29428366 DOI: 10.1016/j.bios.2018.02.012] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 02/02/2018] [Accepted: 02/02/2018] [Indexed: 10/18/2022]
Abstract
17β-estradiol (17β-E2) plays a critical role in regulating reproduction in human, there is therefore an urgent need to detect it sensitively and precisely in a cost-effective and easy method. In this paper, a label-free integrated microfluidic paper-based analytical device was developed for highly sensitive electrochemical detection of 17β-E2. The microfluidic channel of the paper-based sensor was fabricated with wax printing and the three electrodes, including working, counter and reference electrode were screen-printed. Multi-walled carbon nanotubes (MWCNTs)/ thionine (THI)/ gold nanoparticles (AuNPs) Nano composites were synthesized and coated on screen-printed working electrode (SPWE) for the immobilization of anti-E2. In this electro-chemical system of paper-based immunoassay, THI molecules serving as an electrochemical mediator while MWCNTs and AuNPs, due to their excellent electrical conductivities, could accelerate electron transfer for the signal amplification. Experimental results revealed that the immunoassay is able to detect 17β-E2 as low as 10 pg mL-1, with a linear range from 0.01 to 100 ng mL-1. This microfluidic paper-based immunosensor would provide a new platform for low cost, sensitive, specific, and point-of-care diagnosis of 17β-E2.
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Affiliation(s)
- Yang Wang
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 10090, China
| | - Jinping Luo
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 10090, China
| | - Juntao Liu
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 10090, China
| | - Xinrong Li
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 10090, China
| | - Zhuang Kong
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 10090, China
| | - Hongyan Jin
- Obstetrics and Gynecology Department, First Hospital Peking University, Beijing 100034, China.
| | - Xinxia Cai
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 10090, China.
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Settu K, Liu JT, Chen CJ, Tsai JZ. Development of carbon-graphene-based aptamer biosensor for EN2 protein detection. Anal Biochem 2017; 534:99-107. [PMID: 28709900 DOI: 10.1016/j.ab.2017.07.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 07/01/2017] [Accepted: 07/10/2017] [Indexed: 12/20/2022]
Abstract
In this study, we developed a screen-printed carbon-graphene-based electrochemical biosensor for EN2 protein detection. The engrailed-2 (EN2) protein, a biomarker for prostate cancer, is known to be a strong binder to a specific DNA sequence (5'-TAATTA-3') to regulate transcription. To take advantage of this intrinsic property, aptamer probes with TAATTA sequence was immobilized onto the screen-printed carbon-graphene electrode surface via EDC-NHS coupling approach. Cyclic voltammetry (CV) of the electrochemical measurement technique was employed for the quantitative detection of EN2 protein. The hindrance to the redox reaction of potassium ferricyanide on the biosensor surface due to the binding of the immobilized aptamer with its target EN2 protein quantified the protein concentration. Under optimum conditions, the aptamer biosensor can detect EN2 protein over a linear range from 35 to 185 nM with a detection limit of 38.5 nM.
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Affiliation(s)
- Kalpana Settu
- Department of Electrical Engineering, National Taipei University, Sanxia, Taiwan
| | - Jen-Tsai Liu
- College of Materials Sciences and Opto-electronics, University of Chinese Academy of Sciences, Beijing, China
| | - Ching-Jung Chen
- School of Electronic and Communication Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Jang-Zern Tsai
- Department of Electrical Engineering, National Central University, Jhongli, Taiwan.
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Qiu Y, Wang H, Gebhardt S, Bolhovitins A, Démoré CEM, Schönecker A, Cochran S. Screen-printed ultrasonic 2-D matrix array transducers for microparticle manipulation. Ultrasonics 2015; 62:136-146. [PMID: 26026870 DOI: 10.1016/j.ultras.2015.05.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 05/17/2015] [Accepted: 05/17/2015] [Indexed: 06/04/2023]
Abstract
This paper reports the development of a two-dimensional thick film lead zirconate titanate (PZT) ultrasonic transducer array, operating at frequency approximately 7.5MHz, to demonstrate the potential of this fabrication technique for microparticle manipulation. All layers of the array are screen-printed then sintered on an alumina substrate without any subsequent patterning processes. The thickness of the thick film PZT is 139±2μm, the element pitch of the array is 2.3mm, and the dimension of each individual PZT element is 2×2mm(2) with top electrode 1.7×1.7mm(2). The measured relative dielectric constant of the PZT is 2250±100 and the dielectric loss is 0.09±0.005 at 10kHz. Finite element analysis was used to predict the behaviour of the array and to optimise its configuration. Electrical impedance spectroscopy and laser vibrometry were used to characterise the array experimentally. The measured surface motion of a single element is on the order of tens of nanometres with a 10Vpeak continuous sinusoidal excitation. Particle manipulation experiments have been demonstrated with the array by manipulating Ø10μm polystyrene microspheres in degassed water. The simplified array fabrication process and the bulk production capability of screen-printing suggest potential for the commercialisation of multilayer planar resonant devices for ultrasonic particle manipulation.
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Affiliation(s)
- Yongqiang Qiu
- Institute for Medical Science and Technology, University of Dundee, Dundee, United Kingdom.
| | - Han Wang
- Institute for Medical Science and Technology, University of Dundee, Dundee, United Kingdom
| | - Sylvia Gebhardt
- Fraunhofer Institute for Ceramic Technologies and Systems, Dresden, Germany
| | - Aleksandrs Bolhovitins
- Institute for Medical Science and Technology, University of Dundee, Dundee, United Kingdom
| | - Christine E M Démoré
- Institute for Medical Science and Technology, University of Dundee, Dundee, United Kingdom
| | - Andreas Schönecker
- Fraunhofer Institute for Ceramic Technologies and Systems, Dresden, Germany
| | - Sandy Cochran
- Institute for Medical Science and Technology, University of Dundee, Dundee, United Kingdom
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