{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,1]],"date-time":"2025-11-01T05:39:51Z","timestamp":1761975591999,"version":"build-2065373602"},"reference-count":31,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2017,3,29]],"date-time":"2017-03-29T00:00:00Z","timestamp":1490745600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A self-sustained multi-sensor platform for indoor environmental monitoring is proposed in this paper. To reduce the cost and power consumption of the sensing platform, in the developed platform, organic materials of PEDOT:PSS and PEDOT:PSS\/EB-PANI are used as the sensing films for humidity and CO2 detection, respectively. Different from traditional gas sensors, these organic sensing films can operate at room temperature without heating processes or infrared transceivers so that the power consumption of the developed humidity and the CO2 sensors can be as low as 10 \u03bcW and 5 \u03bcW, respectively. To cooperate with these low-power sensors, a Complementary Metal-Oxide-Semiconductor (CMOS) system-on-chip (SoC) is designed to amplify and to read out multiple sensor signals with low power consumption. The developed SoC includes an analog-front-end interface circuit (AFE), an analog-to-digital convertor (ADC), a digital controller and a power management unit (PMU). Scheduled by the digital controller, the sensing circuits are power gated with a small duty-cycle to reduce the average power consumption to 3.2 \u03bcW. The designed PMU converts the power scavenged from a dye sensitized solar cell (DSSC) module into required supply voltages for SoC circuits operation under typical indoor illuminance conditions. To our knowledge, this is the first multiple environmental parameters (Temperature\/CO2\/Humidity) sensing platform that demonstrates a true self-powering functionality for long-term operations.<\/jats:p>","DOI":"10.3390\/s17040715","type":"journal-article","created":{"date-parts":[[2017,3,29]],"date-time":"2017-03-29T11:26:44Z","timestamp":1490786804000},"page":"715","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["A Self-Sustained Wireless Multi-Sensor Platform Integrated with Printable Organic Sensors for Indoor Environmental Monitoring"],"prefix":"10.3390","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9480-9983","authenticated-orcid":false,"given":"Chun-Chang","family":"Wu","sequence":"first","affiliation":[{"name":"Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 10617, Taiwan"}]},{"given":"Wen-Yu","family":"Chuang","sequence":"additional","affiliation":[{"name":"Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 10617, Taiwan"}]},{"given":"Ching-Da","family":"Wu","sequence":"additional","affiliation":[{"name":"Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 10617, Taiwan"}]},{"given":"Yu-Cheng","family":"Su","sequence":"additional","affiliation":[{"name":"Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 10617, Taiwan"}]},{"given":"Yung-Yang","family":"Huang","sequence":"additional","affiliation":[{"name":"Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 10617, Taiwan"}]},{"given":"Yang-Jing","family":"Huang","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei 10617, Taiwan"}]},{"given":"Sheng-Yu","family":"Peng","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei 10617, Taiwan"}]},{"given":"Shih-An","family":"Yu","sequence":"additional","affiliation":[{"name":"Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 10617, Taiwan"}]},{"given":"Chih-Ting","family":"Lin","sequence":"additional","affiliation":[{"name":"Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 10617, Taiwan"}]},{"given":"Shey-Shi","family":"Lu","sequence":"additional","affiliation":[{"name":"Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 10617, Taiwan"}]}],"member":"1968","published-online":{"date-parts":[[2017,3,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2233","DOI":"10.1109\/TII.2014.2300753","article-title":"Internet of things in industries: A survey","volume":"10","author":"Xu","year":"2014","journal-title":"IEEE Trans. Ind. Inform."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Shah, J., and Mishra, B. (2016, January 22\u201324). IoT enabled environmental monitoring system for smart cities. Proceedings of the International Conference on Internet of Things and Applications (IOTA), Pune, India.","DOI":"10.1109\/IOTA.2016.7562757"},{"key":"ref_3","unstructured":"(2017, March 23). Indoor Air Quality Handbook, TSI. A Practical Guide to Indoor Air Quality Investigations. Available online: http:\/\/www.tsi.com\/uploadedFiles\/_Site_Root\/Products\/Literature\/Handbooks\/IAQ_Handbook_2011_US_2980187-web.pdf."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"4535","DOI":"10.1016\/S1352-2310(99)00272-1","article-title":"Indoor Air Quality and Health","volume":"33","author":"Jones","year":"1999","journal-title":"Atmos. Environ."},{"key":"ref_5","first-page":"424016:1","article-title":"Water vapor detection with individual tin oxide nanowires","volume":"18","year":"2007","journal-title":"Nanotechnology"},{"key":"ref_6","first-page":"012004","article-title":"Optical gas sensing: A review","volume":"24","author":"Hodgkinson","year":"2013","journal-title":"Sci. Technol."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Korotcenkov, G. (2013). Materials for Piezoelectric-Based Gas Sensors, Springer.","DOI":"10.1007\/978-1-4614-7165-3_13"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"304","DOI":"10.1016\/j.snb.2009.04.025","article-title":"Carbon nanotubes based transistors as gas sensors: State of the art and critical review","volume":"140","author":"Bondavalli","year":"2009","journal-title":"Sens. Actuators B Chem."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/S0925-4005(00)00639-0","article-title":"Micromachined metal oxide gas sensors: Opportunities to improve sensor performance","volume":"73","author":"Simon","year":"2001","journal-title":"Sens. Actuators B Chem."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"215502","DOI":"10.1088\/0957-4484\/22\/21\/215502","article-title":"MWCNT\u2014polymer composites as highly sensitive and selective room temperature gas sensors","volume":"22","author":"Mangu","year":"2011","journal-title":"Nanotechnology"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"561","DOI":"10.1109\/19.492787","article-title":"Sensor for high-air-humidity measurement","volume":"45","author":"Matko","year":"1996","journal-title":"IEEE Trans. Instrum. Meas."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1159","DOI":"10.1109\/19.746575","article-title":"Quartz sensor for water absorption measurement in glass-fiber resins","volume":"47","author":"Matko","year":"1998","journal-title":"IEEE Trans. Instrum. Meas."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"262","DOI":"10.1016\/j.sna.2014.09.022","article-title":"Temperature-compensated capacitancefrequency converter with high resolution","volume":"220","author":"Matko","year":"2014","journal-title":"Sens. Actuators A Phys."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"710","DOI":"10.1038\/35021028","article-title":"A colorimetric sensor array for odour visualization","volume":"406","author":"Rakow","year":"2000","journal-title":"Nature"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"181","DOI":"10.1108\/02602280410525977","article-title":"A review of gas sensors employed in electronic nose applications","volume":"24","author":"Arshak","year":"2004","journal-title":"Sens. Rev."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"15N","DOI":"10.1039\/B106198B","article-title":"The mChemLab\u2122 project:micro total analysis system R&D at Sandia National Laboratories","volume":"1","author":"Lindner","year":"2001","journal-title":"Lab Chip"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1279","DOI":"10.1016\/j.snb.2015.07.100","article-title":"Tuning of vapor sensing behaviors of eco-friendly conductive polymer composites utilizing ramie fiber","volume":"221","author":"Li","year":"2015","journal-title":"Sens. Actuators B Chem."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"9247","DOI":"10.3390\/s140509247","article-title":"A Low-Power Integrated Humidity CMOS Sensor by Printing-on-Chip Technology","volume":"14","author":"Lee","year":"2014","journal-title":"Sensors"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"628","DOI":"10.1109\/JSEN.2002.807491","article-title":"Toward a miniature wireless integrated multi-sensor micro system for industrial and biomedical applications","volume":"2","author":"Tang","year":"2002","journal-title":"IEEE Sens. J."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"2084","DOI":"10.1109\/TBME.2006.877115","article-title":"A multi transducer micro system for insect monitoring and control","volume":"53","author":"Lemmerhirt","year":"2006","journal-title":"IEEE Trans. Biomed. Eng."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1067","DOI":"10.1109\/JSSC.2009.2014707","article-title":"A 1-V 450-nW fully integrated programmable biomedical sensor interface chip","volume":"44","author":"Zou","year":"2009","journal-title":"IEEE J. Solid-State Circuits"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Peng, S., Gurun, G., Twigg, C.M., Qureshi, M.S., Basu, A., Brink, S., Hasler, P.E., and Degertekin, F.L. (2009, January 24\u201327). A Large-Scale Reconfigurable Smart Sensory Chip. Proceedings of the IEEE International Symposium on Circuits and Systems (ISCAS), Taipei, Taiwan.","DOI":"10.1109\/ISCAS.2009.5118220"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"851","DOI":"10.1109\/JSSC.2013.2297392","article-title":"A Self-Powered CMOS Reconfigurable Multi-Sensor SoC for Biomedical Applications","volume":"49","author":"Huang","year":"2014","journal-title":"IEEE J. Solid-State Circuits"},{"key":"ref_24","unstructured":"Bandyopadhyay, S., and Chandrakasan, A. (2011, January 14\u201317). Platform Architecture for Solar, Thermal and Vibration Energy Combining with MPPT and Single inductor. Proceedings of the Symposium on VLSI Circuits, Kyoto, Japan."},{"key":"ref_25","first-page":"943","article-title":"A 10 nW-1\u03bcW Power Management IC with Integrated Battery Management and Self-Startup for Energy Harvesting Applications","volume":"51","author":"Dina","year":"2015","journal-title":"IEEE J. Solid-State Circuits"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"05DA08","DOI":"10.7567\/JJAP.52.05DA08","article-title":"A Printable Humidity Sensing Material Based on Conductive Polymer and Nanoparticles Composites","volume":"52","author":"Lee","year":"2013","journal-title":"Jpn. J. Appl. Phys."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"177","DOI":"10.1016\/j.snb.2009.08.055","article-title":"Electrical characterization of PEDOT:PSS beyond humidity saturation","volume":"143","author":"Kus","year":"2009","journal-title":"Sens. Actuators B Chem."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"594","DOI":"10.1016\/j.jcis.2011.03.045","article-title":"Primary, secondary, and tertiary amines for CO2 capture: Designing for mesoporous CO2 adsorbents","volume":"361","author":"Ko","year":"2011","journal-title":"J. Colloid Interface Sci."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"259","DOI":"10.1109\/JSSC.2015.2489839","article-title":"A Portable Micro Gas Chromatography System for Lung Cancer Associated Volatile Organic Compound Detection","volume":"51","author":"Tzeng","year":"2016","journal-title":"IEEE J. Solid-State Circuits"},{"key":"ref_30","doi-asserted-by":"crossref","unstructured":"Tang, K.T., Chiu, S.W., Shih, C.H., Chang, C.L., Yang, C.M., Yao, D.J., Wang, J.H., Huang, C.M., Chen, H., and Chang, K.H. (2014, January 9\u201313). A 0.5V 1.27mW Nose-on-a-Chip for Rapid Diagnosis of Ventilator-Associated Pneumonia. Proceedings of the 2014 IEEE International Solid-State Circuits Conference Digest of Technical Papers (ISSCC), San Francisco, CA, USA.","DOI":"10.1109\/ISSCC.2014.6757496"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"1867","DOI":"10.1109\/JSSC.2002.804359","article-title":"CMOS single-chip gas detection system comprising capacitive, calorimetric and mass-sensitive microsensors","volume":"37","author":"Hagleitner","year":"2002","journal-title":"IEEE J. Solid-State Circuits"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/17\/4\/715\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T18:31:34Z","timestamp":1760207494000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/17\/4\/715"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,3,29]]},"references-count":31,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2017,4]]}},"alternative-id":["s17040715"],"URL":"https:\/\/doi.org\/10.3390\/s17040715","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2017,3,29]]}}}