{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,14]],"date-time":"2026-01-14T18:23:55Z","timestamp":1768415035543,"version":"3.49.0"},"reference-count":66,"publisher":"MDPI AG","issue":"19","license":[{"start":{"date-parts":[[2022,10,6]],"date-time":"2022-10-06T00:00:00Z","timestamp":1665014400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"NASA Ames Research Center, Internal Research and Development Fund","award":["SAA5-2020-4-I32973"],"award-info":[{"award-number":["SAA5-2020-4-I32973"]}]},{"name":"NASA Ames Research Center, Internal Research and Development Fund","award":["SAA2-403496"],"award-info":[{"award-number":["SAA2-403496"]}]},{"name":"Department of Human and Health Services","award":["SAA5-2020-4-I32973"],"award-info":[{"award-number":["SAA5-2020-4-I32973"]}]},{"name":"Department of Human and Health Services","award":["SAA2-403496"],"award-info":[{"award-number":["SAA2-403496"]}]},{"DOI":"10.13039\/100000001","name":"NSF\/UW","doi-asserted-by":"publisher","award":["SAA5-2020-4-I32973"],"award-info":[{"award-number":["SAA5-2020-4-I32973"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000001","name":"NSF\/UW","doi-asserted-by":"publisher","award":["SAA2-403496"],"award-info":[{"award-number":["SAA2-403496"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Composites of functionalized single walled carbon nanotubes (SWCNTs) and gold nanoparticles (Au NPs) of \u224815 nm diameter were drop-cast on a printed circuit board (PCB) substrate equipped with interdigitated electrodes to make a hybrid thin film. Addition of Au NPs decorated the surface of SWCNTs networked films and acted as catalysts which resulted into an enhanced sensitivity and low ppb concentration detection limit. The compositions of the film were characterized by scanning electron microscope (SEM). SWCNTs clusters were loaded with various amount of Au NPs ranging from 1\u201310% (by weight) and their effect on Nitric oxide (NO) sensitivity was studied and optimized. Further, the optimized composite films were tested in both air and nitrogen environments and as well as over a wide relative humidity range (0\u201397%). Sensors were also tested for the selectivity by exposing to various gases such as nitrous oxide, ammonia, carbon monoxide, sulfur dioxide and acetone. Sensitivity to NO was found much higher than the other tested gases. The advantage of this sensor is that it is sensitive to NO at low ppb level (10 ppb) with estimated response time within 10 s and recovery time around 1 min, and has excellent reproducibility from sensor to sensor and works within the wide range of relative humidity (0\u201397%).<\/jats:p>","DOI":"10.3390\/s22197581","type":"journal-article","created":{"date-parts":[[2022,10,10]],"date-time":"2022-10-10T05:12:21Z","timestamp":1665378741000},"page":"7581","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Hybrid Carbon Nanotubes\/Gold Nanoparticles Composites for Trace Nitric Oxide Detection over a Wide Range of Humidity"],"prefix":"10.3390","volume":"22","author":[{"given":"Ami","family":"Hannon","sequence":"first","affiliation":[{"name":"KBR Wyle Inc. at NASA Ames Research Center, Moffett Field, CA 94035, USA"},{"name":"Department of Chemical Engineering, University of North Dakota, Grand Forks, ND 58201, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wayne","family":"Seames","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering, University of North Dakota, Grand Forks, ND 58201, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jing","family":"Li","sequence":"additional","affiliation":[{"name":"NASA Ames Research Center, Moffett Field, CA 94035, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,10,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"125","DOI":"10.1007\/s00340-010-3984-z","article-title":"NO trace gas sensor based on quartz-enhanced photoacoustic spectroscopy and external cavity quantum cascade laser","volume":"100","author":"Spagnolo","year":"2010","journal-title":"Appl. Phys. B"},{"key":"ref_2","unstructured":"Wellburn, A.R. (1994). Air Pollution and Climate Change, Longman Scientific Technical. [2nd ed.]."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"623","DOI":"10.5194\/os-13-623-2017","article-title":"Determination of dissolved nitric oxide in coastal waters of the Yellow Sea off Qingdao","volume":"13","author":"Tian","year":"2017","journal-title":"Ocean Sci."},{"key":"ref_4","first-page":"e4864","article-title":"Fractional Exhaled Nitric Oxide Testing: Diagnostic Utility in Asthma, Chronic Obstructive Pulmonary Disease, or Asthma-chronic Obstructive Pulmonary Disease Overlap Syndrome","volume":"11","author":"Miskoff","year":"2019","journal-title":"Cureus"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"485","DOI":"10.1016\/j.marpolbul.2013.01.029","article-title":"Geochemical survey of Levante Bay, Vulcano Island (Italy), a natural laboratory for the study of ocean acidification","volume":"73","author":"Boatta","year":"2013","journal-title":"Mar. Pollut. Bull."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"2091","DOI":"10.5194\/bg-7-2091-2010","article-title":"The Arabian Sea as a high-nutrient, low-chlorophyll region during the late Southwest Monsoon","volume":"7","author":"Naqvi","year":"2010","journal-title":"Biogeosciences"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"755","DOI":"10.1002\/2015GL066853","article-title":"Nitrous oxide production by nitrification and denitrification in the Eastern Tropical South Pacific oxygen minimum zone","volume":"42","author":"Ji","year":"2015","journal-title":"Geophys. Res. Lett."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"C09011","DOI":"10.1029\/2009JC005976","article-title":"Eastern Pacific oxygen minimum zones: Supply paths and multidecadal changes","volume":"115","author":"Stramma","year":"2010","journal-title":"J. Geophys. Res."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1023\/A:1025119512447","article-title":"Impact of different forms of N fertilizer on N2O emissions from intensive grassland","volume":"67","author":"Dobbie","year":"2003","journal-title":"Nutr. Cycl. Agroecosystems"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"802","DOI":"10.1007\/s12237-008-9056-5","article-title":"Fifty-Five Years of Fish Kills in Coastal Texas","volume":"31","author":"Thronson","year":"2008","journal-title":"Estuaries Coasts"},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Smith, K. (2010). Marine pathways to nitrous oxide. Nitrous Oxide and Climate Change, Earthscan.","DOI":"10.4324\/9781849775113"},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Bange, H.W., Capone, D.G., Bronk, D.A., Mulholland, M.R., and Carpenter, E.J. (2008). Gaseous Nitrogen Compounds (NO, N2O, N2, NH3) in the Ocean, Elsevier.","DOI":"10.1016\/B978-0-12-372522-6.00002-5"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"263","DOI":"10.1021\/ac50052a011","article-title":"Determination of dissolved nitrous oxide in aquatic systems by gas chromatography using electron-capture detection and multiple phase equilibration","volume":"52","author":"Elkins","year":"1980","journal-title":"Anal. Chem."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"579","DOI":"10.1197\/j.aem.2005.01.018","article-title":"Exhaled nitric oxide levels during acute asthma exacerbation","volume":"12","author":"Gill","year":"2005","journal-title":"Acad. Emerg. Med."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"683","DOI":"10.1146\/annurev.ph.57.030195.003343","article-title":"Nitric oxide signaling in the central nervous system","volume":"57","author":"Garthwaite","year":"1995","journal-title":"Annu. Rev. Physiol."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"929","DOI":"10.1002\/ppul.20469","article-title":"Exhaled breath condensate nitrite\/nitrate and pH in relation to pediatric asthma control and exhaled nitric oxide","volume":"41","author":"Ratnawati","year":"2006","journal-title":"Pediatr. Pulmonol."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Meier, J., Stapleton, J., Hofferber, E., Haworth, A., Kachman, S., and Iverson, N.M. (2021). Quantification of Nitric Oxide Concentration Using Single-Walled Carbon Nanotube Sensors. Nanomaterials, 11.","DOI":"10.3390\/nano11010243"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"5502","DOI":"10.1088\/0957-4484\/18\/37\/375502","article-title":"Carbon nanotube sensors for exhaled breath components","volume":"18","author":"Kuzmych","year":"2007","journal-title":"Nanotechnology"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"292","DOI":"10.1016\/j.snb.2011.05.063","article-title":"Development of high sensitivity potentiometric NOx sensor and its application to breath analysis","volume":"158","author":"Mondal","year":"2011","journal-title":"Sens. Actuators B."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"7084","DOI":"10.3390\/s150407084","article-title":"A Room Temperature Nitric Oxide Gas Sensor Based on a Copper-Ion-Doped Polyaniline\/Tungsten Oxide Nanocomposite","volume":"15","author":"Wang","year":"2015","journal-title":"Sensors"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"293","DOI":"10.1016\/j.snb.2010.10.043","article-title":"Gas sensors based on anodic tungsten oxide","volume":"153","author":"Kukkola","year":"2011","journal-title":"Sens. Actuators B Chem."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"226","DOI":"10.1016\/S0925-4005(01)00572-X","article-title":"Detection and quantification of nitric oxide in human breath using a semiconducting oxide based chemiresistive microsensor","volume":"76","author":"Fruhberger","year":"2001","journal-title":"Sens. Actuators B Chem."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"117","DOI":"10.1016\/j.snb.2013.05.090","article-title":"Nitric oxide sensors using combination of p- and n-type semiconducting oxides and its application for detecting NO in human breath","volume":"186","author":"Sun","year":"2013","journal-title":"Sens. Actuators B."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"467","DOI":"10.1016\/j.snb.2007.08.011","article-title":"NOx sensing properties of In2O3 thin films grown by MOCVD","volume":"129","author":"Ali","year":"2008","journal-title":"Sens. Actuators B Chem."},{"key":"ref_25","first-page":"239","article-title":"NO Sensing Characteristics of ZnO Nanorod Prepared by Ultrasound Radiation Method","volume":"221","author":"Kim","year":"2006","journal-title":"Sensors IEEE"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"14877","DOI":"10.1039\/D0RA00488J","article-title":"Nitric oxide sensors using nanospiral ZnO thin film deposited by GLAD for application to exhaled human breath","volume":"10","author":"Luo","year":"2020","journal-title":"RSC Adv."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"1114","DOI":"10.1016\/j.snb.2011.10.014","article-title":"Low temperature operating SnO2 thin film sensor loaded with WO3 micro-discs with enhanced response for NO2 gas","volume":"161","author":"Sharma","year":"2012","journal-title":"Sens. Actuators B Chem."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"668","DOI":"10.1016\/j.snb.2011.02.016","article-title":"A nitric oxide gas sensor based on Rayleigh surface acoustic wave resonator for room temperature operation","volume":"156","author":"Wang","year":"2011","journal-title":"Sens. Actuators B. Chem."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"8393","DOI":"10.1143\/JJAP.45.8393","article-title":"NO Sensing Property of Carbon Nanotube Based Thin Film Gas Sensors Prepared by Chemical Vapor Deposition Techniques","volume":"45","author":"Ueda","year":"2006","journal-title":"Jpn. J. Appl. Phys."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"7","DOI":"10.1149\/1.3118533","article-title":"Carbon Nanotube Based Chemical Sensors for Space and Terrestrial Applications","volume":"19","author":"Li","year":"2009","journal-title":"ECS Trans."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"289","DOI":"10.1016\/j.snb.2008.08.024","article-title":"Pt- and Pd-nanoclusters functionalized carbon nanotubes networked films for sub-ppm gas sensors","volume":"135","author":"Penza","year":"2008","journal-title":"Sens. Actuators B Chem."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"6562","DOI":"10.1166\/jnn.2018.15695","article-title":"Functionalized Carbon Nanotube Sensors for the Detection of Sub-ppm Nitric Oxide Gas","volume":"18","author":"Kang","year":"2018","journal-title":"J. Nanosci. Nanotechnol."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"4298","DOI":"10.1002\/pssb.200776118","article-title":"Nitric oxide gas sensors with functionalized carbon nanotubes","volume":"244","author":"Mustonen","year":"2007","journal-title":"Phys. Stat. Sol."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"149250","DOI":"10.1016\/j.apsusc.2021.149250","article-title":"Characteristics of Highly Sensitive and Selective Nitric Oxide Gas Sensors Using Defect-Functionalized Single-Walled Carbon Nanotubes at Room Temperature","volume":"550","author":"Jeong","year":"2021","journal-title":"Appl. Surf. Sci."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"1587","DOI":"10.1039\/C8NR07393G","article-title":"High-performance gas sensors based on single-wall carbon nanotube random networks for the detection of nitric oxide down to the ppb-level","volume":"11","author":"Jeon","year":"2019","journal-title":"Nanoscale"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"1063","DOI":"10.1021\/ar010166k","article-title":"Defects in Carbon Nanotubes","volume":"35","author":"Charlier","year":"2002","journal-title":"Acc. Chem. Res."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"716","DOI":"10.1016\/j.snb.2014.07.119","article-title":"Facile and scalable fabrication of chemiresistive sensor array for hydrogen detection based on gold-nanoparticle decorated SWCNT network","volume":"204","author":"Seo","year":"2014","journal-title":"Sens. Actuators B Chem."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"21014","DOI":"10.1021\/jp064371z","article-title":"Gas sensor array based on metal-decorated carbon nanotubes","volume":"110","author":"Star","year":"2006","journal-title":"J. Phys. Chem. B"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"2687","DOI":"10.1002\/elan.201100299","article-title":"Gas Sensing Mechanism of Gold Nanoparticles Decorated Single-Walled Carbon Nanotubes","volume":"23","author":"Mubeen","year":"2011","journal-title":"Electroanalysis"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"176","DOI":"10.1016\/j.snb.2009.04.008","article-title":"Functional characterization of carbon nanotube networked films functionalized with tuned loading of Au nanoclusters for gas sensing applications","volume":"140","author":"Penza","year":"2009","journal-title":"Sens. Actuators B Chem."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"910","DOI":"10.3762\/bjnano.5.104","article-title":"Gas sensing with gold-decorated vertically aligned carbon nanotubes","volume":"5","author":"Mudimela","year":"2014","journal-title":"Beilstein J. Nanotechnol."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"4592","DOI":"10.1021\/nn200294h","article-title":"Gas Sensing with Au-Decorated Carbon Nanotubes","volume":"5","author":"Zanolli","year":"2011","journal-title":"ACS Nano"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"4207","DOI":"10.1007\/s00542-018-3712-x","article-title":"Ammonia gas sensors with Au-decorated carbon nanotubes","volume":"24","author":"Young","year":"2018","journal-title":"Microsyst. Technol."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"055208","DOI":"10.1088\/0957-4484\/25\/5\/055208","article-title":"Metallic nanoparticles functionalizing carbon nanotube networks for gas sensing applications","volume":"25","author":"Abdelhalim","year":"2014","journal-title":"Nanotechnology"},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"3071","DOI":"10.1039\/b718262g","article-title":"Electrochemically functionalized carbon nanotubes for device applications","volume":"18","author":"Balasubramanian","year":"2008","journal-title":"J. Mater. Chem."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"3712","DOI":"10.1021\/jp027500u","article-title":"Effect of Chemical Oxidation on the Structure of Single-Walled Carbon Nanotubes","volume":"107","author":"Zhang","year":"2003","journal-title":"J. Phys. Chem. B"},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"833","DOI":"10.1016\/j.carbon.2008.02.012","article-title":"Chemical Oxidation of Multiwalled Carbon Nanotubes","volume":"46","author":"Datsyuk","year":"2008","journal-title":"Carbon"},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"76","DOI":"10.1016\/j.aca.2018.04.028","article-title":"Multi-DNAzymes-functionalized gold nanoparticles for ultrasensitive chemiluminescence detection of thrombin on microchip","volume":"76","author":"Wang","year":"2018","journal-title":"Anal. Chim. Acta"},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"1800","DOI":"10.1021\/jp9091305","article-title":"Small Gold Nanoparticles Synthesized with Sodium Citrate and Heavy Water: Insights into the Reaction Mechanism","volume":"114","author":"Romero","year":"2010","journal-title":"J. Phys. Chem. C"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"224","DOI":"10.14356\/kona.2020011","article-title":"Synthesis of Precision Gold Nanoparticles Using Turkevich Method","volume":"37","author":"Dong","year":"2020","journal-title":"Kona Powder Sci. Technol. Jpn."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"271","DOI":"10.1016\/j.snb.2018.08.153","article-title":"Fluorescence turn-on detection of fenitrothion using gold nanoparticle quenched fluorescein and its separation using superparamagnetic iron oxide nanoparticle","volume":"277","author":"Nebu","year":"2018","journal-title":"Sens. Actuators B Chem."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"714","DOI":"10.1016\/j.jallcom.2019.05.153","article-title":"Review of the methodologies used in the synthesis gold nanoparticles by chemical reduction","volume":"798","author":"Nogueira","year":"2019","journal-title":"J. Alloys Compd."},{"key":"ref_53","doi-asserted-by":"crossref","unstructured":"Hannon, A., and Li, J. (2019). Solid State Electronic Sensors for Detection of Carbon Dioxide. Sensors, 19.","DOI":"10.3390\/s19183848"},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"107057","DOI":"10.1155\/2008\/107057","article-title":"Surface Modification of Carbon Nanotube Networked Films with Au Nanoclusters for Enhanced N O 2 Gas Sensing Applications","volume":"2008","author":"Penza","year":"2008","journal-title":"J. Sens."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"5765","DOI":"10.1021\/cm071758l","article-title":"Effect of Mild Nitric Acid Oxidation on Dispersability, Size, and Structure of Single-Walled Carbon Nanotubes","volume":"19","author":"Tchoul","year":"2007","journal-title":"Chem. Mater."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"230","DOI":"10.1016\/j.bios.2018.03.032","article-title":"Hybridization conditions of oligonucleotide-capped gold nanoparticles for SPR sensing of microRNA","volume":"109","author":"Hong","year":"2018","journal-title":"Biosens. Bioelectron."},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"1801","DOI":"10.1126\/science.287.5459.1801","article-title":"Extreme Oxygen Sensitivity of Electronic Properties of Carbon Nanotubes","volume":"287","author":"Collins","year":"2000","journal-title":"Science"},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"195","DOI":"10.1088\/0957-4484\/13\/2\/312","article-title":"Gas molecule adsorption in carbon nanotubes and nanotube bundles","volume":"13","author":"Zhao","year":"2002","journal-title":"Nanotechnology"},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"426","DOI":"10.1016\/j.snb.2005.11.056","article-title":"Behavior of single-walled carbon nanotube-based gas sensors at various temperatures of treatment and operation","volume":"117","author":"Nguyen","year":"2006","journal-title":"Sens. Actuators B Chem."},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"12","DOI":"10.1186\/1556-276X-8-12","article-title":"Detection of a CO and NH3 gas mixture using carboxylic acid-functionalized single-walled carbon nanotubes","volume":"8","author":"Dong","year":"2013","journal-title":"Nanoscale Res. Lett."},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"3339","DOI":"10.1021\/jp013219o","article-title":"Mesoscopic Metal Particles and Wires by Electrodeposition","volume":"106","author":"Penner","year":"2002","journal-title":"J. Phys. Chem. B"},{"key":"ref_62","doi-asserted-by":"crossref","first-page":"250","DOI":"10.1021\/ac901871d","article-title":"Sensitive Detection of H2S Using Gold Nanoparticle Decorated Single-Walled Carbon Nanotubes","volume":"82","author":"Mubeen","year":"2010","journal-title":"Anal. Chem."},{"key":"ref_63","doi-asserted-by":"crossref","unstructured":"Zou, M., Aono, Y., Inoue, S., and Matsumura, Y. (2020). Response of Palladium and Carbon Nanotube Composite Films to Hydrogen Gas and Behavior of Conductive Carriers. Materials, 13.","DOI":"10.3390\/ma13204568"},{"key":"ref_64","doi-asserted-by":"crossref","first-page":"12418","DOI":"10.1021\/ja027861n","article-title":"Water-Soluble and Optically pH-Sensitive Single-Walled Carbon Nanotubes from Surface Modification","volume":"124","author":"Zhao","year":"2002","journal-title":"J. Am. Chem. Soc."},{"key":"ref_65","doi-asserted-by":"crossref","first-page":"82","DOI":"10.1021\/je60060a013","article-title":"Influence of pH and ionic strength upon solubility of nitric oxide in aqueous solution","volume":"19","author":"Armor","year":"1974","journal-title":"J. Chem. Eng. Data"},{"key":"ref_66","doi-asserted-by":"crossref","first-page":"548","DOI":"10.1186\/1556-276X-7-548","article-title":"Effect of doping on single-walled carbon nanotubes network of different metallicity","volume":"7","author":"Tey","year":"2012","journal-title":"Nanoscale Res. Lett."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/19\/7581\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T00:47:23Z","timestamp":1760143643000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/19\/7581"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,10,6]]},"references-count":66,"journal-issue":{"issue":"19","published-online":{"date-parts":[[2022,10]]}},"alternative-id":["s22197581"],"URL":"https:\/\/doi.org\/10.3390\/s22197581","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,10,6]]}}}