{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,9]],"date-time":"2026-10-09T11:51:46Z","timestamp":1791546706258,"version":"4.3.4"},"reference-count":32,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2026,5,22]],"date-time":"2026-05-22T00:00:00Z","timestamp":1779408000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Science and Technology Program of the Fujian Province, China","award":["2024I1004"],"award-info":[{"award-number":["2024I1004"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In this study, poly(vinylpyrrolidone) (PVP)-modified liquid metal (LM) particles were formulated into a mixed-solvent system comprising ethanol (EtOH), 1,2-propanediol (1,2-PG), and a trace amount of N,N-dimethylformamide (DMF). This design addresses the instability, poor wetting\/adhesion on polydimethylsiloxane (PDMS), and limited rheological tunability of conventional LM inks for screen printing. By regulating solvent evaporation during drying, the system enables coordinated control over wettability, viscosity, shear-thinning behavior, and drying-induced film formation. At an LM:PVP weight ratio of 20:1, the contact angle on PDMS decreased from 115\u00b0 to 17.8\u00b0. The ink exhibited pronounced shear-thinning characteristics with tunable viscosity in the range of 1000\u20133000 cP, meeting the screen-printing requirements of facile mesh passage and rapid setting. Following laser activation, the printed conductive patterns demonstrated stable electrical performance, with a resistance drift of less than 1% after 14 days of storage and a \u0394R\/R0 of less than 1% after 3000 bending cycles at a bending diameter of 1 cm. Furthermore, a resistance drift of less than 3% was observed after 1000 stretching cycles at 30% strain. This study proposes a viable materials and processing strategy for the reliable screen printing of LM:PVP ink on PDMS substrates toward flexible conductive electronics. The motion-monitoring test is presented only as a preliminary proof-of-concept demonstration of motion-induced electrical resistance response, rather than as a sensor performance evaluation.<\/jats:p>","DOI":"10.3390\/s26113279","type":"journal-article","created":{"date-parts":[[2026,5,22]],"date-time":"2026-05-22T09:17:09Z","timestamp":1779441429000},"page":"3279","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Development of a Screen-Printable Liquid Metal Ink on PDMS Substrates Toward Flexible Conductive Electronics"],"prefix":"10.3390","volume":"26","author":[{"given":"Mengwen","family":"Guo","sequence":"first","affiliation":[{"name":"School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shengming","family":"Jin","sequence":"additional","affiliation":[{"name":"School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China"},{"name":"Key Laboratory for Mineral Materials and Application of Hunan Province, Central South University, Changsha 410083, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sanhu","family":"Liu","sequence":"additional","affiliation":[{"name":"Changsha Advanced Materials Industrial Research Institute Co., Ltd., Changsha 410083, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fang","family":"Wang","sequence":"additional","affiliation":[{"name":"Changsha Advanced Materials Industrial Research Institute Co., Ltd., Changsha 410083, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,5,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1446","DOI":"10.1016\/j.matt.2020.03.016","article-title":"Liquid Metal Composites","volume":"2","author":"Chen","year":"2020","journal-title":"Matter"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"510","DOI":"10.1080\/19475411.2023.2261775","article-title":"Failure Mechanisms in Flexible Electronics","volume":"14","author":"Zhao","year":"2023","journal-title":"Int. J. Smart Nano Mater."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1606425","DOI":"10.1002\/adma.201606425","article-title":"Stretchable and Soft Electronics Using Liquid Metals","volume":"29","author":"Dickey","year":"2017","journal-title":"Adv. Mater."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Xu, B., Ye, F., Chang, G., and Li, R. (2020). A Simple and Cost-Effective Method for Producing Stable Surfactant-Coated EGaIn Liquid Metal Nanodroplets. Materials, 13.","DOI":"10.3390\/ma13173753"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"131277","DOI":"10.1016\/j.matlet.2021.131277","article-title":"Highly Stretchable Liquid-Metal Based Strain Devices with High Sensitivity for Human Activity Monitoring","volume":"308","author":"Wang","year":"2022","journal-title":"Mater. Lett."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"69686","DOI":"10.1021\/acsami.5c20100","article-title":"A Recyclable, Ecofriendly, and Biofriendly Biomass-Based Elastomer via the Nanoactivation Effect of Liquid Metal for Electronic Skin","volume":"17","author":"Liu","year":"2025","journal-title":"ACS Appl. Mater. Interfaces"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"109107","DOI":"10.1016\/j.nanoen.2023.109107","article-title":"Liquid Metal-Based Triboelectric Nanogenerators for Energy Harvesting and Emerging Applications","volume":"120","author":"Xu","year":"2024","journal-title":"Nano Energy"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"102920","DOI":"10.1016\/j.apmt.2025.102920","article-title":"Techniques to Develop Large-Area Multilayer Flexible Antennas Based on Liquid Metals","volume":"47","author":"Yan","year":"2025","journal-title":"Appl. Mater. 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C"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"2411647","DOI":"10.1002\/adfm.202411647","article-title":"Directly Printable and Adhesive Liquid Metal Ink for Wearable Devices","volume":"35","author":"Chen","year":"2025","journal-title":"Adv. Funct. Mater."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"2301292","DOI":"10.1002\/advs.202301292","article-title":"Ultrasonic-Enabled Nondestructive and Substrate-Independent Liquid Metal Ink Sintering","volume":"10","author":"Liu","year":"2023","journal-title":"Adv. Sci."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"117131","DOI":"10.1016\/j.sna.2025.117131","article-title":"Screen-Printed Flexible Electronic Devices: A Review","volume":"396","author":"Thiyagarajan","year":"2025","journal-title":"Sens. Actuators A Phys."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"1401","DOI":"10.1007\/s11998-018-0091-2","article-title":"How Rheological Properties Affect Fine-Line Screen Printing of Pastes: A Combined Rheological and High-Speed Video Imaging Study","volume":"15","author":"Xu","year":"2018","journal-title":"J. Coat. Technol. Res."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1302","DOI":"10.1039\/D4TA07147F","article-title":"Proanthocyanidin-Enhanced Wettability and Adhesion in Liquid Metal Inks for Multi-Substrate Patterning in Soft Electronics","volume":"13","author":"Liu","year":"2025","journal-title":"J. Mater. Chem. A"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"118946","DOI":"10.1016\/j.est.2025.118946","article-title":"Recent Advances in Screen Printable Microsupercapacitors for Emerging Printed Electronics","volume":"140","author":"Naik","year":"2025","journal-title":"J. Energy Storage"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"7503","DOI":"10.1021\/acsaelm.5c01256","article-title":"Multifunctional Screen-Printed Conductive Inks: Design Principles, Performance Challenges, and Application Horizons","volume":"7","author":"Islam","year":"2025","journal-title":"ACS Appl. Electron. Mater."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"2501829","DOI":"10.1002\/smll.202501829","article-title":"Versatile Liquid Metal Composite Inks for Printable, Durable, and Ultra-Stretchable Electronics","volume":"21","author":"Pyeon","year":"2025","journal-title":"Small"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"303","DOI":"10.3389\/fmats.2019.00303","article-title":"Advances in the Development of Liquid Metal-Based Printed Electronic Inks","volume":"6","author":"Wang","year":"2019","journal-title":"Front. Mater."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1038\/s41528-025-00394-8","article-title":"Fully Screen Printed Stretchable Liquid Metal Multilayer Circuits Using Green Solvents and Scalable Water-Spray Sintering","volume":"9","author":"Shang","year":"2025","journal-title":"npj Flex. Electron."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"9085","DOI":"10.1038\/s41467-025-63433-y","article-title":"A General Finite-Gel Strategy for Highly Concentrated Liquid Metal Inks","volume":"16","author":"Ma","year":"2025","journal-title":"Nat. Commun."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"4806","DOI":"10.1038\/s41467-024-48906-w","article-title":"High Internal Phase Emulsions Gel Ink for Direct-Ink-Writing 3D Printing of Liquid Metal","volume":"15","author":"Lin","year":"2024","journal-title":"Nat. Commun."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"e00333","DOI":"10.1002\/admt.202500333","article-title":"High Solid Content Liquid Metal Ink for Flexible Printed Circuits: Formulation, Stability, and Multi-Layer Integration","volume":"10","author":"Chiu","year":"2025","journal-title":"Adv. Mater. Technol."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1741","DOI":"10.1002\/app.1969.070130815","article-title":"Estimation of the Surface Free Energy of Polymers","volume":"13","author":"Owens","year":"1969","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"306","DOI":"10.1006\/jcis.2002.8594","article-title":"Surface Modification of Sylgard-184 Poly (Dimethyl Siloxane) Networks by Ultraviolet and Ultraviolet\/Ozone Treatment","volume":"254","author":"Efimenko","year":"2002","journal-title":"J. Colloid Interface Sci."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"6410","DOI":"10.1039\/D5SM00377F","article-title":"Synergistic Influence of Substrate Wettability and Topography on Surface Phase Separation in PS\/PMMA Blend Thin Films","volume":"21","author":"Saikiran","year":"2025","journal-title":"Soft Matter"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"100903","DOI":"10.1016\/j.apmt.2020.100903","article-title":"Versatile Fabrication of Liquid Metal Nano-Ink Based Flexible Electronic Devices","volume":"22","author":"Zhang","year":"2021","journal-title":"Appl. Mater. Today"},{"key":"ref_29","unstructured":"Larson, R.G. (1999). The Structure and Rheology of Complex Fluids, Oxford University Press."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"827","DOI":"10.1038\/39827","article-title":"Capillary Flow as the Cause of Ring Stains from Dried Liquid Drops","volume":"389","author":"Deegan","year":"1997","journal-title":"Nature"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"136103","DOI":"10.1103\/PhysRevLett.97.136103","article-title":"Simple Model of Skin Formation Caused by Solvent Evaporation in Polymer Solutions","volume":"97","author":"Okuzono","year":"2006","journal-title":"Phys. Rev. Lett."},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Nishikawa, T., Yamane, H., Matsuhisa, N., and Miki, N. (2023). Stretchable Strain Sensor with Small but Sufficient Adhesion to Skin. Sensors, 23.","DOI":"10.3390\/s23041774"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/26\/11\/3279\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,5,22]],"date-time":"2026-05-22T09:25:04Z","timestamp":1779441904000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/26\/11\/3279"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,5,22]]},"references-count":32,"journal-issue":{"issue":"11","published-online":{"date-parts":[[2026,6]]}},"alternative-id":["s26113279"],"URL":"https:\/\/doi.org\/10.3390\/s26113279","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,5,22]]}}}