{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,28]],"date-time":"2026-02-28T22:41:19Z","timestamp":1772318479079,"version":"3.50.1"},"reference-count":29,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2016,12,22]],"date-time":"2016-12-22T00:00:00Z","timestamp":1482364800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National High Technology Research and Development Program of China","award":["2015AA034801"],"award-info":[{"award-number":["2015AA034801"]}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61405021"],"award-info":[{"award-number":["61405021"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61675037"],"award-info":[{"award-number":["61675037"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Natural Science Foundation of Chongqing, China","award":["cstc2014jcyjA40045"],"award-info":[{"award-number":["cstc2014jcyjA40045"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A graphene-based long-period fiber grating (LPFG) surface plasmon resonance (SPR) sensor is proposed. A monolayer of graphene is coated onto the Ag film surface of the LPFG SPR sensor, which increases the intensity of the evanescent field on the surface of the fiber and thereby enhances the interaction between the SPR wave and molecules. Such features significantly improve the sensitivity of the sensor. The experimental results demonstrate that the sensitivity of the graphene-based LPFG SPR sensor can reach 0.344 nm%\u22121 for methane, which is improved 2.96 and 1.31 times with respect to the traditional LPFG sensor and Ag-coated LPFG SPR sensor, respectively. Meanwhile, the graphene-based LPFG SPR sensor exhibits excellent response characteristics and repeatability. Such a SPR sensing scheme offers a promising platform to achieve high sensitivity for gas-sensing applications.<\/jats:p>","DOI":"10.3390\/s17010002","type":"journal-article","created":{"date-parts":[[2016,12,22]],"date-time":"2016-12-22T09:48:53Z","timestamp":1482400133000},"page":"2","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":89,"title":["Graphene-Based Long-Period Fiber Grating Surface Plasmon Resonance Sensor for High-Sensitivity Gas Sensing"],"prefix":"10.3390","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9850-6661","authenticated-orcid":false,"given":"Wei","family":"Wei","sequence":"first","affiliation":[{"name":"Key Laboratory of Optoelectronic Technology &amp; Systems, Ministry of Education of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China"},{"name":"Chongqing Research Center for Advanced Materials, Chongqing Academy of Science and Technology, Chongqing 401123, China"},{"name":"Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 401122, China"}]},{"given":"Jinpeng","family":"Nong","sequence":"additional","affiliation":[{"name":"Key Laboratory of Optoelectronic Technology &amp; Systems, Ministry of Education of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China"},{"name":"Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 401122, China"}]},{"given":"Guiwen","family":"Zhang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Optoelectronic Technology &amp; Systems, Ministry of Education of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China"}]},{"given":"Linlong","family":"Tang","sequence":"additional","affiliation":[{"name":"Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 401122, China"},{"name":"Chongqing Engineering Research Center of Graphene Film Manufacturing, Chongqing 401329, China"}]},{"given":"Xiao","family":"Jiang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Optoelectronic Technology &amp; Systems, Ministry of Education of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China"}]},{"given":"Na","family":"Chen","sequence":"additional","affiliation":[{"name":"Key Laboratory of Optoelectronic Technology &amp; Systems, Ministry of Education of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China"}]},{"given":"Suqin","family":"Luo","sequence":"additional","affiliation":[{"name":"Chongqing Research Center for Advanced Materials, Chongqing Academy of Science and Technology, Chongqing 401123, China"}]},{"given":"Guilian","family":"Lan","sequence":"additional","affiliation":[{"name":"Key Laboratory of Optoelectronic Technology &amp; Systems, Ministry of Education of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China"}]},{"given":"Yong","family":"Zhu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Optoelectronic Technology &amp; Systems, Ministry of Education of China, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China"}]}],"member":"1968","published-online":{"date-parts":[[2016,12,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"110","DOI":"10.1016\/j.snb.2016.01.118","article-title":"SPR Biosensors: Historical Perspectives and Current Challenges","volume":"229","author":"Singh","year":"2016","journal-title":"Sens. Actuators B Chem."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"3883","DOI":"10.1007\/s00216-014-8411-6","article-title":"Review of plasmonic fiber optic biochemical sensors: improving the limit of detection","volume":"407","author":"Caucheteur","year":"2015","journal-title":"Anal. Bioanal. Chem."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"473","DOI":"10.1016\/j.nbt.2015.03.012","article-title":"Smart design of fiber optic surfaces for improved plasmonic biosensing","volume":"32","author":"Arghir","year":"2015","journal-title":"New Biotechnol."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"678","DOI":"10.1016\/j.snb.2016.02.034","article-title":"Thermal annealing of gold coated fiber optic surfaces for improved plasmonic biosensing","volume":"229","author":"Antohe","year":"2016","journal-title":"Sens. Actuators B Chem."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"206","DOI":"10.1016\/j.snb.2016.02.020","article-title":"Surface plasmon resonance refractive sensor based on silver-coated side-polished fiber","volume":"230","author":"Zhao","year":"2016","journal-title":"Sens. Actuators B Chem."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"38","DOI":"10.1016\/j.sna.2015.10.030","article-title":"Experimental realization and performance evaluation of refractive index SPR sensor based on unmasked short tapered multimode-fiber operating in aqueous environments","volume":"236","author":"Noor","year":"2015","journal-title":"Sens. Actuators A Phys."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"2804","DOI":"10.1016\/j.bios.2009.02.007","article-title":"Novel U-bent fiber optic probe for localized surface plasmon resonance based biosensor","volume":"24","author":"Sai","year":"2009","journal-title":"Biosens. Bioelectron."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"4822","DOI":"10.1109\/JSEN.2016.2549271","article-title":"SPR Sensor Platform Based on a Novel Metal Bilayer Applied on D\u2013Shaped Plastic Optical Fibers for Refractive Index Measurements in the Range 1.38\u20131.42","volume":"16","author":"Cennamo","year":"2016","journal-title":"IEEE Sens. J."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1470","DOI":"10.1364\/AO.55.001470","article-title":"Highly sensitive surface plasmon resonance sensor utilizing a long period grating with photosensitive cladding","volume":"55","author":"Li","year":"2016","journal-title":"Appl. Opt."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"226","DOI":"10.1016\/j.snb.2009.10.062","article-title":"Fibre-optic SPR sensor with a FBG interrogation scheme for readout enhancement","volume":"144","author":"Viegas","year":"2010","journal-title":"Sens. Actuators B Chem."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"23254","DOI":"10.1364\/OE.17.023254","article-title":"Theoretical analysis of a fiber optic surface plasmon resonance sensor utilizing a Bragg grating","volume":"17","author":"Homola","year":"2009","journal-title":"Opt. Express"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"8814","DOI":"10.1021\/la301445h","article-title":"Nanoporous TiO2\/polyion thin-film-coated long-period grating sensors for the direct measurement of low-molecular-weight analytes","volume":"28","author":"Yang","year":"2012","journal-title":"Langmuir"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"477","DOI":"10.1016\/j.snb.2014.10.013","article-title":"Sensitivity enhancing of transition mode long-period fiber grating as methane sensor using high refractive index polycarbonate\/cryptophane A overlay deposition","volume":"207","author":"Yang","year":"2015","journal-title":"Sens. Actuators B Chem."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"13875","DOI":"10.1364\/OE.21.013875","article-title":"Investigation of LPG-SPR sensors using the finite element method and eigenmode expansion method","volume":"21","author":"He","year":"2013","journal-title":"Opt. Express"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"171","DOI":"10.1007\/s11082-016-0452-y","article-title":"Characteristics of plasmon coupling mode in SPR based LPFG","volume":"48","author":"Gu","year":"2016","journal-title":"Opt. Quantum Electron."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"192","DOI":"10.1038\/nature11458","article-title":"A roadmap for graphene","volume":"490","author":"Novoselov","year":"2012","journal-title":"Nature"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"325","DOI":"10.3390\/nano3030325","article-title":"Photoelectrochemical Properties of Graphene and Its Derivatives","volume":"3","author":"Wei","year":"2013","journal-title":"Nanomaterials"},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Wei, W., Nong, J., Tang, L., Zhang, G., Yang, J., and Luo, W. (2016). Conformal Graphene-Decorated Nanofluidic Sensors Based on Surface Plasmons at Infrared Frequencies. Sensors, 16.","DOI":"10.3390\/s16060899"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"12334","DOI":"10.1038\/ncomms12334","article-title":"Far-field nanoscale infrared spectroscopy of vibrational fingerprints of molecules with graphene plasmons","volume":"7","author":"Hu","year":"2016","journal-title":"Nat. Commun."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1109","DOI":"10.1007\/s11468-015-0149-2","article-title":"Coupling of Graphene Plasmonics Modes Induced by Near-Field Perturbation at Terahertz Frequencies","volume":"11","author":"Wei","year":"2016","journal-title":"Plasmonics"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"165","DOI":"10.1126\/science.aab2051","article-title":"Mid-infrared plasmonic biosensing with graphene","volume":"349","author":"Rodrigo","year":"2015","journal-title":"Science"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"4637","DOI":"10.1016\/j.bios.2011.05.039","article-title":"Recent advances in graphene-based biosensors","volume":"26","author":"Kuila","year":"2011","journal-title":"Biosens. Bioelectron."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"275","DOI":"10.1016\/j.optcom.2015.12.071","article-title":"Evanescent wave absorption sensor based on tapered multimode fiber coated with monolayer graphene film","volume":"366","author":"Qiu","year":"2016","journal-title":"Opt. Commun."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"6030","DOI":"10.1364\/OL.39.006030","article-title":"Graphene-based D-shaped fiber multicore mode interferometer for chemical gas sensing","volume":"39","author":"Wu","year":"2014","journal-title":"Opt. Lett."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1235","DOI":"10.1364\/OL.39.001235","article-title":"Graphene-coated microfiber Bragg grating for high-sensitivity gas sensing","volume":"39","author":"Wu","year":"2014","journal-title":"Opt. Lett."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"51","DOI":"10.1016\/j.physrep.2009.02.003","article-title":"Raman spectroscopy in graphene","volume":"473","author":"Malard","year":"2009","journal-title":"Phys. Rep."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"1020","DOI":"10.1364\/OE.16.001020","article-title":"On the performance quantification of resonant refractive index sensors","volume":"16","author":"White","year":"2008","journal-title":"Opt. Express"},{"key":"ref_28","unstructured":"Palik, E.D., and Ghosh, G. (1985). Handbook of Optical Constants of Solids, Academic Press."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"125431","DOI":"10.1103\/PhysRevB.85.125431","article-title":"Synthesis of highly confined surface plasmon modes with doped graphene sheets in the midinfrared and terahertz frequencies","volume":"85","author":"Gan","year":"2012","journal-title":"Phys. Rev. B"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/17\/1\/2\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T19:29:03Z","timestamp":1760210943000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/17\/1\/2"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2016,12,22]]},"references-count":29,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2017,1]]}},"alternative-id":["s17010002"],"URL":"https:\/\/doi.org\/10.3390\/s17010002","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2016,12,22]]}}}