{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,8]],"date-time":"2026-03-08T08:26:12Z","timestamp":1772958372487,"version":"3.50.1"},"reference-count":32,"publisher":"MDPI AG","issue":"21","license":[{"start":{"date-parts":[[2019,10,30]],"date-time":"2019-10-30T00:00:00Z","timestamp":1572393600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100008982","name":"Qatar National Research Fund","doi-asserted-by":"publisher","award":["NPRP11S-0104-180192"],"award-info":[{"award-number":["NPRP11S-0104-180192"]}],"id":[{"id":"10.13039\/100008982","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This work presents a cost-effective shadow mask printing approach to fabricate flexible sensors. The liquid-state sensing material can be directly brushed on a flexible substrate through a shadow mask. The ink leakage issue which often occurs in printed electronics is addressed with a custom taping scheme. A simple thermal compression bonding approach is also proposed to package the functional area of the sensor. To verify the feasibility and robustness of the proposed fabrication approach, a prototyped strain gauge displacement sensor is fabricated using carbon ink as the sensing material and a flexible polyimide (PI) film as the substrate. Once the substrate is deformed, cracks in the solidified ink layer can cause an increased resistance in the conductive path, thus achieving function of stable displacement\/strain sensing. As a demonstration for displacement sensing application, this sensor is evaluated by studying its real-time resistance response under both static and dynamic mechanical loading. The fabricated sensor shows a comparable performance (with a gauge factor of ~17.6) to those fabricated using costly lithography or inkjet printing schemes, while with a significantly lower production cost.<\/jats:p>","DOI":"10.3390\/s19214713","type":"journal-article","created":{"date-parts":[[2019,10,31]],"date-time":"2019-10-31T05:18:26Z","timestamp":1572499106000},"page":"4713","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["A Low-Cost Strain Gauge Displacement Sensor Fabricated via Shadow Mask Printing"],"prefix":"10.3390","volume":"19","author":[{"given":"Ying","family":"Yi","sequence":"first","affiliation":[{"name":"Division of Information and Computing Technology, College of Science and Engineering, Hamad Bin Khalifa University, Doha 34110, Qatar"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9359-4869","authenticated-orcid":false,"given":"Bo","family":"Wang","sequence":"additional","affiliation":[{"name":"Division of Information and Computing Technology, College of Science and Engineering, Hamad Bin Khalifa University, Doha 34110, Qatar"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Amine","family":"Bermak","sequence":"additional","affiliation":[{"name":"Division of Information and Computing Technology, College of Science and Engineering, Hamad Bin Khalifa University, Doha 34110, Qatar"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,10,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"222","DOI":"10.1038\/nature14002","article-title":"Ultrasensitive mechanical crack-based sensor inspired by the spider sensory system","volume":"516","author":"Kang","year":"2014","journal-title":"Nature"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1069","DOI":"10.1109\/JMEMS.2006.881489","article-title":"A high-performance MEMS capacitive strain sensing system","volume":"15","author":"Suster","year":"2006","journal-title":"J. Microelectromech. Syst."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1622","DOI":"10.1021\/nn506341u","article-title":"Tunable Piezoresistivity of Nanographene Films for Strain Sensing","volume":"9","author":"Zhao","year":"2015","journal-title":"ACS Nano"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"3117","DOI":"10.1002\/adma.201300587","article-title":"Localization of folds and cracks in thin metal films coated on flexible elastomer foams","volume":"25","author":"Vandeparre","year":"2013","journal-title":"Adv. Mater."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1600053","DOI":"10.1002\/admt.201600053","article-title":"Highly Flexible Wrinkled Carbon Nanotube Thin Film Strain Sensor to Monitor Human Movement","volume":"1","author":"Park","year":"2016","journal-title":"Adv. Mater. Technol."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"5650","DOI":"10.1002\/adma.201301796","article-title":"SWCNT\/Graphite Nanoplatelet Hybrid Thin Films for Self-Temperature-Compensated, Highly Sensitive, and Extensible Piezoresistive Sensors","volume":"25","author":"Luo","year":"2013","journal-title":"Adv. Mater."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"3921","DOI":"10.1021\/nn500845a","article-title":"Fully Printed, Highly Sensitive Multifunctional Artificial Electronic Whisker Arrays Integrated with Strain and Temperature Sensors","volume":"8","author":"Harada","year":"2014","journal-title":"ACS Nano"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1859","DOI":"10.1038\/ncomms2832","article-title":"Flexible polymer transistors with high pressure sensitivity for application in electronic skin and health monitoring","volume":"4","author":"Schwartz","year":"2013","journal-title":"Nat. Commun."},{"key":"ref_9","first-page":"699","article-title":"Graphene-based strain gauge on a flexible substrate","volume":"26","author":"Gamil","year":"2014","journal-title":"Sens. Mater."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"790","DOI":"10.1016\/j.proeng.2016.11.260","article-title":"A Hydrogen Pressure Sensor based on Bulk-micromachined Silicon Strain Gauges","volume":"168","author":"Kim","year":"2016","journal-title":"Procedia Eng."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"433","DOI":"10.1111\/j.1755-3768.2008.01404.x","article-title":"Wireless contact lens sensor for intraocular pressure monitoring: Assessment on enucleated pig eyes","volume":"87","author":"Leonardi","year":"2009","journal-title":"Acta Ophthalmol."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"2","DOI":"10.1016\/j.sna.2009.12.031","article-title":"Capacitive tactile sensor array for touch screen application","volume":"165","author":"Kim","year":"2011","journal-title":"Sens. Actuators A Phys."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1429","DOI":"10.1002\/app.39461","article-title":"Recent advances in flexible sensors for wearable and implantable devices","volume":"130","author":"Pang","year":"2013","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.sna.2008.08.001","article-title":"Rubber-based strain sensor fabricated using photolithography for intelligent tires","volume":"148","author":"Matsuzaki","year":"2008","journal-title":"Sens. Actuators A Phys."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"1166","DOI":"10.1039\/C6NR07333F","article-title":"Superfast and high-sensitivity printable strain sensors with bioinspired micron-scale cracks","volume":"9","author":"Song","year":"2017","journal-title":"Nanoscale"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1117","DOI":"10.1021\/cr050139y","article-title":"Micro-and Nanopatterning Techniques for Organic Electronic and Optoelectronic Systems","volume":"107","author":"Menard","year":"2007","journal-title":"Chem. Rev."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"116144","DOI":"10.1016\/j.synthmet.2019.116144","article-title":"In-situ deposition of reduced graphene oxide layers on textile surfaces by the reactive inkjet printing technique and their use in supercapacitor applications","volume":"256","author":"Stempien","year":"2019","journal-title":"Synth. Met."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"4677","DOI":"10.1002\/adma.201401053","article-title":"Inkjet Printing of Conductive Inks with High Lateral Resolution on Omniphobic RFPaper for Paper-Based Electronics and MEMS","volume":"26","author":"Lessing","year":"2014","journal-title":"Adv. Mater."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1201","DOI":"10.1038\/s41467-017-01210-2","article-title":"Fully inkjet-printed two-dimensional material field-effect heterojunctions for wearable and textile electronics","volume":"8","author":"Carey","year":"2017","journal-title":"Nat. Commun."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"3383","DOI":"10.1007\/s11434-010-3251-y","article-title":"Inkjet printing for flexible electronics: Materials, processes and equipments","volume":"55","author":"Yin","year":"2010","journal-title":"Chin. Sci. Bull."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"34810","DOI":"10.1039\/C7RA05837C","article-title":"Crack-based strain sensor with diverse metal films by inserting an inter-layer","volume":"7","author":"Lee","year":"2017","journal-title":"RSC Adv."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"737","DOI":"10.1088\/0964-1726\/15\/3\/009","article-title":"A carbon nanotube strain sensor for structural health monitoring","volume":"15","author":"Kang","year":"2006","journal-title":"Smart Mater. Struct."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"92","DOI":"10.1016\/j.electacta.2017.02.139","article-title":"Water based homogenous carbon ink modified electrode as an efficient sensor system for simultaneous detection of ascorbic acid, dopamine and uric acid","volume":"233","author":"Dinesh","year":"2017","journal-title":"Electrochim. Acta"},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Yi, Y., Ali, S., and Wang, B. (2019, January 8\u201310). An Inkjet-printed Strain Sensor with a Carbon-SilverPolyimide Topology. Proceedings of the 2019 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS), Glasgow, UK.","DOI":"10.1109\/FLEPS.2019.8792238"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"59","DOI":"10.1007\/s00542-013-1778-z","article-title":"PMMA to Polystyrene bonding for polymer based microfluidic systems","volume":"20","author":"Fan","year":"2013","journal-title":"Microsyst. Technol."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"7274","DOI":"10.1021\/am401624r","article-title":"Flexible palladium-based H2 sensor with fast response and low leakage detection by nanoimprint lithography","volume":"5","author":"Lim","year":"2013","journal-title":"ACS Appl. Mater. Interfaces"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"105028","DOI":"10.1088\/0964-1726\/22\/10\/105028","article-title":"Development of inkjet printed strain sensors","volume":"22","author":"Correia","year":"2013","journal-title":"Smart Mater. Struct."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"296","DOI":"10.1038\/nnano.2011.36","article-title":"A stretchable carbon nanotube strain sensor for human-motion detection","volume":"6","author":"Yamada","year":"2011","journal-title":"Nat. Nanotechnol."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"3719","DOI":"10.3390\/s8063719","article-title":"Sensor for Measuring Strain in Textile","volume":"8","author":"Mattmann","year":"2008","journal-title":"Sensors"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"726","DOI":"10.1002\/stc.1714","article-title":"Development and application of a relative displacement sensor for structural health monitoring of composite bridges","volume":"22","author":"Li","year":"2015","journal-title":"Struct. Control Health Monit."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"11932","DOI":"10.1039\/C4NR03295K","article-title":"A stretchable strain sensor based on a metal nanoparticle thin film for human motion detection","volume":"6","author":"Lee","year":"2014","journal-title":"Nanoscale"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"375501","DOI":"10.1088\/0957-4484\/26\/37\/375501","article-title":"Ultra-stretchable and skin-mountable strain sensors using carbon nanotubes\u2013Ecoflex nanocomposites","volume":"26","author":"Amjadi","year":"2015","journal-title":"Nanotechnology"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/21\/4713\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T13:30:26Z","timestamp":1760189426000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/19\/21\/4713"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,10,30]]},"references-count":32,"journal-issue":{"issue":"21","published-online":{"date-parts":[[2019,11]]}},"alternative-id":["s19214713"],"URL":"https:\/\/doi.org\/10.3390\/s19214713","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,10,30]]}}}