{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,22]],"date-time":"2026-06-22T19:33:41Z","timestamp":1782156821424,"version":"3.54.5"},"reference-count":46,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2020,5,14]],"date-time":"2020-05-14T00:00:00Z","timestamp":1589414400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61534003, 31771054, 81371663"],"award-info":[{"award-number":["61534003, 31771054, 81371663"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"(Ministry of Education in China) Liberal arts and Social Sciences Foundation","award":["17YJC890022"],"award-info":[{"award-number":["17YJC890022"]}]},{"DOI":"10.13039\/501100004608","name":"Natural Science Foundation of Jiangsu Province","doi-asserted-by":"publisher","award":["BK20170448"],"award-info":[{"award-number":["BK20170448"]}],"id":[{"id":"10.13039\/501100004608","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100013280","name":"Major Basic Research Project of the Natural Science Foundation of the Jiangsu Higher Education Institutions","doi-asserted-by":"publisher","award":["16KJB180019"],"award-info":[{"award-number":["16KJB180019"]}],"id":[{"id":"10.13039\/501100013280","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Jiang Su Liberal arts and Social Sciences Foundation","award":["17YJC890022"],"award-info":[{"award-number":["17YJC890022"]}]},{"name":"Natural Key Science Research Program of Jiangsu Education Department","award":["19KJA320006"],"award-info":[{"award-number":["19KJA320006"]}]},{"name":"Directive Project of Science and Technology Plan of Nantong City","award":["MS12018028"],"award-info":[{"award-number":["MS12018028"]}]},{"name":"&quot;Six Major Talents Project&quot; of Jiangsu Province","award":["SWYY-116"],"award-info":[{"award-number":["SWYY-116"]}]},{"name":"\u201c226 Engineering\u201d Research Project of the Nantong Government","award":["226 Engineering"],"award-info":[{"award-number":["226 Engineering"]}]},{"name":"Opening Project of State Key Laboratory of Bioelectronics in Southeast University","award":["Southeast University"],"award-info":[{"award-number":["Southeast University"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In this work, a smartphone-based electrochemical detection system was designed and developed for rapid and real-time detection of dopamine (DA). The system included a screen-printed electrode (SPE) used as a sensor, a hand-held electrochemical potentiostat and a smart phone with a specially designed app. During the detection period, the SPEs modified with poly(3,4-ethylenedioxythiophene) (PEDOT), chitosan (CS) and graphene (G) were used to convert and amplify the electrochemical reaction signals. The electrochemical potentiostat was used to generate excitation electrical signals and collect the electrical signals converted from the sensor. The smartphone\u2014connected to the detector via Bluetooth-was used to control the detector for tests, further process the uploaded data, and plot graphs in real time. Experimental results showed that the self-designed sensing system could be employed for highly selective detection of DA in the presence of interfering substances such as ascorbic acid (AA) and uric acid (UA). CV was carried out to characterize the electrochemical properties of the modified SPEs and the electrochemical behaviors of DA on the modified SPEs. Finally, according to the analysis of DPV responses of DA, the system could detect DA with a detection sensitivity of 0.52 \u00b1 0.01 \u03bcA\/\u03bcM and a limit of detection of 0.29 \u03bcM in the linear range of DA concentrations from 0.05 to 70 \u03bcM.<\/jats:p>","DOI":"10.3390\/s20102781","type":"journal-article","created":{"date-parts":[[2020,5,14]],"date-time":"2020-05-14T10:27:19Z","timestamp":1589452039000},"page":"2781","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":66,"title":["Smartphone-Based Electrochemical Potentiostat Detection System Using PEDOT: PSS\/Chitosan\/Graphene Modified Screen-Printed Electrodes for Dopamine Detection"],"prefix":"10.3390","volume":"20","author":[{"given":"Xiaoyan","family":"Shen","sequence":"first","affiliation":[{"name":"School of Information Science and Technology, Nantong University, Nantong 226019, China"},{"name":"Co-Innovation Center of Neuroregeneration, Nantong University, Nantong 226019, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6577-7062","authenticated-orcid":false,"given":"Feng","family":"Ju","sequence":"additional","affiliation":[{"name":"School of Information Science and Technology, Nantong University, Nantong 226019, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guicai","family":"Li","sequence":"additional","affiliation":[{"name":"Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Nantong University, Nantong 226001, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lei","family":"Ma","sequence":"additional","affiliation":[{"name":"School of Information Science and Technology, Nantong University, Nantong 226019, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2020,5,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Al-Graiti, W., Yue, Z., Foroughi, J., Huang, X.-F., Wallace, G., Baughman, R., and Chen, J. 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