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Hari Gupta G, Mohan K, Ghosh S, Sarath Babu S, Velyutham R, Kapusetti G. Label-Free detection of Poly-Cystic Ovarian Syndrome using a highly conductive 2-D rGO/MoS 2/PANI nanocomposite based immunosensor. Bioelectrochemistry 2024; 158:108681. [PMID: 38493574 DOI: 10.1016/j.bioelechem.2024.108681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 03/11/2024] [Accepted: 03/13/2024] [Indexed: 03/19/2024]
Abstract
Polycystic ovarian syndrome (PCOS) is an endocrinal disorder characterized by multiple tiny cysts, amenorrhea, dysmenorrhea, hirsutism, and infertility. The current diagnostic tools comprise of expensive, time-consuming ultrasonography to serological test, which have low patient compliance. To address these limitations, we have developed a highly sensitive, cost effective and ultrafast immunosensor for the diagnosis of PCOS. Herein, we have fabricated a 2-D electro conductive composites of reduced Graphene oxide (rGO), Molybdenum disulfide (MoS2), and Polyaniline (PANI) as electrode material. Furthermore, for detecting an early and non-cyclic biomarker of PCOS, i.e. anti-Mullerian hormone (AMH). We utilize the specific antigen-antibody mechanism, in which monoclonal Anti-AMH antibodies were covalently immobilized using EDC-NHS chemistry on electrode. The developed biosensor was physicochemical and electrochemically characterized to demonstrate its efficiency. Further we have investigated the biosensor's performance with Cyclic Voltammetry, Differential Pulse Voltammetry, and Electrochemical Impedance Spectroscopy. We have validated that under the optimized condition the immunosensor exhibits higher sensitivity with a LOD of ∼ 2.0 ng/mL with a linear range up to 100 ng/mL. Furthermore, this immunosensor works efficiently with a lower sample volume (>5 μL), which provides a sensitive, reproducible, low-cost, rapid analysis to detect AMH level in PCOS diagnosis.
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Affiliation(s)
- Gourang Hari Gupta
- Department of Medical Devices, National Institute of Pharmaceutical Education and Research (NIPER)- Ahmedabad, India
| | - Keerthana Mohan
- Department of Medical Devices, National Institute of Pharmaceutical Education and Research (NIPER)- Ahmedabad, India
| | - Sumanta Ghosh
- Department of Medical Devices, National Institute of Pharmaceutical Education and Research (NIPER)- Ahmedabad, India
| | | | | | - Govinda Kapusetti
- National Institute of Pharmaceutical Education and Research (NIPER), Kolkata, India; Department of Medical Devices, National Institute of Pharmaceutical Education and Research (NIPER)- Ahmedabad, India.
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2
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Mukherjee S, Mukherjee A, Bytesnikova Z, Ashrafi AM, Richtera L, Adam V. 2D graphene-based advanced nanoarchitectonics for electrochemical biosensors: Applications in cancer biomarker detection. Biosens Bioelectron 2024; 250:116050. [PMID: 38301543 DOI: 10.1016/j.bios.2024.116050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 01/01/2024] [Accepted: 01/17/2024] [Indexed: 02/03/2024]
Abstract
Low-cost, rapid, and easy-to-use biosensors for various cancer biomarkers are of utmost importance in detecting cancer biomarkers for early-stage metastasis control and efficient diagnosis. The molecular complexity of cancer biomarkers is overwhelming, thus, the repeatability and reproducibility of measurements by biosensors are critical factors. Electrochemical biosensors are attractive alternatives in cancer diagnosis due to their low cost, simple operation, and promising analytical figures of merit. Recently graphene-derived nanostructures have been used extensively for the fabrication of electrochemical biosensors because of their unique physicochemical properties, including the high electrical conductivity, adsorption capacity, low cost and ease of mass production, presence of oxygen-containing functional groups that facilitate the bioreceptor immobilization, increased flexibility and mechanical strength, low cellular toxicity. Indeed, these properties make them advantageous compared to other alternatives. However, some drawbacks must be overcome to extend their use, such as poor and uncontrollable deposition on the substrate due to the low dispersity of some graphene materials and irreproducibility of the results because of the differences in various batches of the produced graphene materials. This review has documented the most recently developed strategies for electrochemical sensor fabrication. It differs in the categorization method compared to published works to draw greater attention to the wide opportunities of graphene nanomaterials for biological applications. Limitations and future scopes are discussed to advance the integration of novel technologies such as artificial intelligence, the internet of medical things, and triboelectric nanogenerators to eventually increase efficacy and efficiency.
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Affiliation(s)
- Soumajit Mukherjee
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00, Brno, Czech Republic
| | - Atripan Mukherjee
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00, Brno, Czech Republic; ELI Beamlines Facility, The Extreme Light Infrastructure ERIC, Za Radnici 835, 252 41, Dolni Breznany, Czech Republic
| | - Zuzana Bytesnikova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00, Brno, Czech Republic
| | - Amir M Ashrafi
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00, Brno, Czech Republic
| | - Lukas Richtera
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00, Brno, Czech Republic; Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00, Brno, Czech Republic
| | - Vojtech Adam
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00, Brno, Czech Republic.
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Rajarathinam T, Thirumalai D, Jayaraman S, Yang S, Ishigami A, Yoon JH, Paik HJ, Lee J, Chang SC. Glutamate oxidase sheets-Prussian blue grafted amperometric biosensor for the real time monitoring of glutamate release from primary cortical neurons. Int J Biol Macromol 2024; 254:127903. [PMID: 37939751 DOI: 10.1016/j.ijbiomac.2023.127903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 10/25/2023] [Accepted: 11/03/2023] [Indexed: 11/10/2023]
Abstract
Glutamate (GLU) is a primary excitatory neurotransmitter, and its dysregulation is associated with several neurodegenerative disorders. A major challenge in GLU estimation is the existence of other biomolecules in the brain that could directly get oxidized at the electrode. Hence, highly selective electroenzymatic biosensors that enable rapid estimation of GLU are needed. Initially, a copolymer, poly(2-dimethylaminoethyl methacrylate- styrene) was synthesized through reversible addition-fragmentation chain transfer polymerization to noncovalently functionalize reduced graphene oxide (rGO), named DS-rGO. Glutamate oxidase macromolecule immobilized DS-rGO formed enzyme nanosheets, which was drop-coated over Prussian blue electrodeposited disposable electrodes to fabricate the GLU biosensor. The interconnectivity between the enzyme nanosheets and the Prussian blue endows the biosensor with enhanced conductivity and electrochemical activity. The biosensor exhibited a linearity: 3.25-250 μM; sensitivity: 3.96 μA mM-1 cm-2, and a limit of detection: 0.96 μM for GLU in the Neurobasal Medium. The biosensor was applied to an in vitro primary rat cortical model to discriminate GLU levels in Neurobasal Medium, before and after KCl mediated depolarization, which provides new insights for elucidating neuronal functioning in the brain.
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Affiliation(s)
- Thenmozhi Rajarathinam
- Department of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Republic of Korea
| | - Dinakaran Thirumalai
- BIT Convergence-based Innovative Drug Development Targeting Metainflammation, Pusan National University, Busan 46241, Republic of Korea
| | - Sivaguru Jayaraman
- Department of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Republic of Korea
| | - Seonguk Yang
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
| | - Akihito Ishigami
- Molecular Regulation of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo 173-0015, Japan
| | - Jang-Hee Yoon
- Busan Center, Korea Basic Science Institute, Busan 46241, Republic of Korea
| | - Hyun-Jong Paik
- Department of Polymer Science and Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Jaewon Lee
- Department of Pharmacy, College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea.
| | - Seung-Cheol Chang
- Department of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Republic of Korea.
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Alatzoglou C, Tzianni EI, Patila M, Trachioti MG, Prodromidis MI, Stamatis H. Structure-Function Studies of Glucose Oxidase in the Presence of Carbon Nanotubes and Bio-Graphene for the Development of Electrochemical Glucose Biosensors. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 14:85. [PMID: 38202540 PMCID: PMC10780548 DOI: 10.3390/nano14010085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 12/20/2023] [Accepted: 12/25/2023] [Indexed: 01/12/2024]
Abstract
In this work, we investigated the effect of multi-walled carbon nanotubes (MWCNTs) and bio-graphene (bG) on the structure and activity of glucose oxidase (GOx), as well as on the performance of the respective electrochemical glucose biosensors. Various spectroscopic techniques were applied to evaluate conformational changes in GOx molecules induced by the presence of MWCNTs and bG. The results showed that MWCNTs induced changes in the flavin adenine dinucleotide (FAD) prosthetic group of GOx, and the tryptophan residues were exposed to a more hydrophobic environment. Moreover, MWCNTs caused protein unfolding and conversion of α-helix to β-sheet structure, whereas bG did not affect the secondary and tertiary structure of GOx. The effect of the structural changes was mirrored by a decrease in the activity of GOx (7%) in the presence of MWCNTs, whereas the enzyme preserved its activity in the presence of bG. The beneficial properties of bG over MWCNTs on GOx activity were further supported by electrochemical data at two glucose biosensors based on GOx entrapped in chitosan gel in the presence of bG or MWCNTs. bG-based biosensors exhibited a 1.33-fold increased sensitivity and improved reproducibility for determining glucose over the sweat-relevant concentration range of glucose.
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Affiliation(s)
- Christina Alatzoglou
- Biotechnology Laboratory, Department of Biological Applications and Technologies, University of Ioannina, 45110 Ioannina, Greece; (C.A.); (M.P.)
| | - Eleni I. Tzianni
- Laboratory of Analytical Chemistry, University of Ioannina, 45110 Ioannina, Greece; (E.I.T.); (M.G.T.)
| | - Michaela Patila
- Biotechnology Laboratory, Department of Biological Applications and Technologies, University of Ioannina, 45110 Ioannina, Greece; (C.A.); (M.P.)
| | - Maria G. Trachioti
- Laboratory of Analytical Chemistry, University of Ioannina, 45110 Ioannina, Greece; (E.I.T.); (M.G.T.)
| | - Mamas I. Prodromidis
- Laboratory of Analytical Chemistry, University of Ioannina, 45110 Ioannina, Greece; (E.I.T.); (M.G.T.)
| | - Haralambos Stamatis
- Biotechnology Laboratory, Department of Biological Applications and Technologies, University of Ioannina, 45110 Ioannina, Greece; (C.A.); (M.P.)
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5
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Low-density Pt nanoarray-based hydrogen peroxide sensing platform and its application in trace sarcosine detection. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.141952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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6
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Rajarathinam T, Thirumalai D, Kwon M, Lee S, Jayaraman S, Paik HJ, Lee J, Chang SC. Screen-printed carbon electrode modified with de-bundled single-walled carbon nanotubes for voltammetric determination of norepinephrine in ex vivo rat tissue. Bioelectrochemistry 2022; 146:108155. [DOI: 10.1016/j.bioelechem.2022.108155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 04/01/2022] [Accepted: 05/05/2022] [Indexed: 11/16/2022]
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7
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Ferreira NS, Carneiro LP, Viezzer C, Almeida MJ, Marques AC, Pinto AM, Fortunato E, Sales MGF. Passive direct methanol fuel cells acting as fully autonomous electrochemical biosensors: Application to sarcosine detection. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Mahmoudi‐Moghaddam H, Garkani‐Nejad Z. Determination of Anti‐Parkinson Drug Pramipexole Using a Label‐free Biosensor and Evaluation of its Interaction with ds‐DNA. ELECTROANAL 2021. [DOI: 10.1002/elan.202100551] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Hadi Mahmoudi‐Moghaddam
- Chemistry Department, Faculty of Science Shahid Bahonar University of Kerman Kerman 7616913439 Iran
| | - Zahra Garkani‐Nejad
- Chemistry Department, Faculty of Science Shahid Bahonar University of Kerman Kerman 7616913439 Iran
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Rajarathinam T, Kim S, Thirumalai D, Lee S, Kwon M, Paik HJ, Kim S, Chang SC. Robust Nanozyme-Enzyme Nanosheets-Based Lactate Biosensor for Diagnosing Bacterial Infection in Olive Flounder ( Paralichthys olivaceus). BIOSENSORS 2021; 11:439. [PMID: 34821655 PMCID: PMC8615781 DOI: 10.3390/bios11110439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 10/29/2021] [Accepted: 11/02/2021] [Indexed: 05/09/2023]
Abstract
Bacterial infections in fish farms increase mass mortality and rapid detection of infection can help prevent its widespread. Lactate is an important biomarker for early diagnosis of bacterial infections in farmed olive flounder (Paralichthys olivaceus). To determine the lactate levels, we designed a disposable amperometric biosensor based on Prussian blue nanozyme and lactate oxidase (LOX) entrapped in copolymer-reduced graphene oxide (P-rGO) on screen-printed carbon electrodes. Because LOX is inherently unstable, P-rGO nanosheets were utilized as a base matrix to immobilize it. After optimization in terms of enzyme loading, operating potential, and pH, the biosensor displayed maximum current responses within 5 s at the applied potential of -0.1 V vs. internal Ag/AgCl. The biosensor had Langmuir-type response in the lactate concentration range from 10 µM to 1.6 mM, a dynamic linear response range of 10-100 µM, a sensitivity of 15.9 µA mM-1 cm-2, and a lower detection limit of 3.1 µM (S/N = 3). Additionally, the biosensor featured high reproducibility, good selectivity, and stability till four weeks. Its practical applicability was tested in olive flounder infected by Streptococcus parauberis against the uninfected control. The results were satisfactory compared to those of a standard colorimetric assay kit, validating our method.
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Affiliation(s)
- Thenmozhi Rajarathinam
- Department of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea; (T.R.); (D.T.)
| | - Seonghye Kim
- Department of Chemistry, Pusan National University, Busan 46241, Korea; (S.K.); (S.L.); (S.K.)
| | - Dinakaran Thirumalai
- Department of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea; (T.R.); (D.T.)
| | - Sujin Lee
- Department of Chemistry, Pusan National University, Busan 46241, Korea; (S.K.); (S.L.); (S.K.)
| | - Minho Kwon
- Department of Polymer Science and Engineering, Pusan National University, Busan 46241, Korea; (M.K.); (H.-j.P.)
| | - Hyun-jong Paik
- Department of Polymer Science and Engineering, Pusan National University, Busan 46241, Korea; (M.K.); (H.-j.P.)
| | - Suhkmann Kim
- Department of Chemistry, Pusan National University, Busan 46241, Korea; (S.K.); (S.L.); (S.K.)
| | - Seung-Cheol Chang
- Department of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea; (T.R.); (D.T.)
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Kwon M, Yang J, Kim H, Joo H, Joo SW, Lee YS, Lee HJ, Jeong SY, Han JH, Paik HJ. Controlling Graphene Wrinkles through the Phase Transition of a Polymer with a Low Critical Solution Temperature. Macromol Rapid Commun 2021; 42:e2100489. [PMID: 34599783 DOI: 10.1002/marc.202100489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/28/2021] [Indexed: 11/06/2022]
Abstract
A novel method for controlling reduced graphene oxide (rGO) wrinkles through a phase transition in a solution using a low critical solution temperature (LCST) polymer dispersant has been developed. The polymer dispersant is designed by control of architecture and composition using reversible addition-fragmentation chain transfer polymerization. Synthesized poly(2-(dimethylaminoethyl) methacrylate-block-styrene) (PDbS) can be successfully functionalized on the rGO surface via noncovalent functionalization. PDbS-functionalized rGO (PDbS-rGO) exhibits good dispersibility in an aqueous phase at room temperature and forms wrinkles on the PDbS-rGO surface because of phase transition at the LCST of the polymer dispersant. The formation of PDbS-rGO wrinkles is controlled by varying the aggregation number of the polymer dispersant on the PDbS-rGO surface that strongly depends on temperature. This is confirmed by transmission electron microscopy, scanning electron microscopy, and Raman spectroscopy (ID' /IG ratios are 0.560, 0.579, and 0.684, which correspond to 45, 70, and 95 °C, respectively). In addition, the mechanism of wrinkle control is proved by gold nanoparticles that are grown in polymer dispersant on the PDbS-rGO surface.
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Affiliation(s)
- Minho Kwon
- Department of Polymer Science and Engineering Pusan National University 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 609-735, Korea
| | - Jiyeon Yang
- Department of Polymer Science and Engineering Pusan National University 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 609-735, Korea
| | - Hanyoung Kim
- Department of Polymer Science and Engineering Pusan National University 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 609-735, Korea
| | - Hyeyoung Joo
- Department of Polymer Science and Engineering Pusan National University 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 609-735, Korea
| | - Sang-Woo Joo
- Department of Chemistry Soongsil University 369, Sangdo-ro, Dongjak-gu, Seoul, 06978, Korea
| | - Young Sil Lee
- Industry-Academic Cooperation, Kumoh National Institute of Technology, Gumi, 39177, Korea
| | - Hye Jung Lee
- Nano Hybrid Technology Research Center, Korea Electrotechnology Research Institute (KERI), Changwon, 641-120, Korea
| | - Seung Yol Jeong
- Nano Hybrid Technology Research Center, Korea Electrotechnology Research Institute (KERI), Changwon, 641-120, Korea.,Department of Electro-Functionality Materials Engineering, University of Science and Technology(UST), Daejon, 305-333, Korea
| | - Jong Hun Han
- School of Applied Chemical Engineering Chonnam National University 77, Yongbong-ro, Buk-gu, Gwangju, 500-757, Korea
| | - Hyun-Jong Paik
- Department of Polymer Science and Engineering Pusan National University 2, Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 609-735, Korea
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Thirumalai D, Lee S, Kwon M, Paik HJ, Lee J, Chang SC. Disposable Voltammetric Sensor Modified with Block Copolymer-Dispersed Graphene for Simultaneous Determination of Dopamine and Ascorbic Acid in Ex Vivo Mouse Brain Tissue. BIOSENSORS-BASEL 2021; 11:bios11100368. [PMID: 34677324 PMCID: PMC8534151 DOI: 10.3390/bios11100368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 09/26/2021] [Accepted: 09/30/2021] [Indexed: 12/02/2022]
Abstract
Dopamine (DA) and ascorbic acid (AA) are two important biomarkers with similar oxidation potentials. To facilitate their simultaneous electrochemical detection, a new voltammetric sensor was developed by modifying a screen-printed carbon electrode (SPCE) with a newly synthesized block copolymer (poly(DMAEMA-b-styrene), PDbS) as a dispersant for reduced graphene oxide (rGO). The prepared PDbS–rGO and the modified SPCE were characterized using a range of physical and electrochemical techniques including Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, cyclic voltammetry, electrochemical impedance spectroscopy, and linear sweep voltammetry. Compared to the bare SPCE, the PDbS–rGO-modified SPCE (PDbS–rGO/SPCE) showed better sensitivity and peak-to-peak separation for DA and AA in mixed solutions. Under the optimum conditions, the dynamic linear ranges for DA and AA were 0.1–300 and 10–1100 µM, and the detection limits were 0.134 and 0.88 µM (S/N = 3), respectively. Furthermore, PDbS–rGO/SPCE exhibited considerably enhanced anti-interference capability, high reproducibility, and storage stability for four weeks. The practical potential of the PDbS–rGO/SPCE sensor for measuring DA and AA was demonstrated using ex vivo brain tissues from a Parkinson’s disease mouse model and the control.
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Affiliation(s)
- Dinakaran Thirumalai
- Department of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea;
| | - Seulah Lee
- College of Pharmacy, Pusan National University, Busan 46241, Korea; (S.L.); (J.L.)
| | - Minho Kwon
- Department of Polymer Science and Engineering, Pusan National University, Busan 46241, Korea; (M.K.); (H.-j.P.)
| | - Hyun-jong Paik
- Department of Polymer Science and Engineering, Pusan National University, Busan 46241, Korea; (M.K.); (H.-j.P.)
| | - Jaewon Lee
- College of Pharmacy, Pusan National University, Busan 46241, Korea; (S.L.); (J.L.)
| | - Seung-Cheol Chang
- Department of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea;
- Correspondence:
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