DataVXACS Applied Materials & InterfacesPaper
journal article·2021-08-11Open access

Stretchable and Sensitive Silver Nanowire-Hydrogel Strain Sensors for Proprioceptive Actuation

Kirthika Senthil Kumar, Lei Zhang, Manivannan Sivaperuman Kalairaj, Hritwick Banerjee, Xiao Xiao, Catherine Cai Jiayi, Hui Huang, Chwee Ming Lim, Jianyong Ouyang, Hongliang Ren

ACS Applied Materials & Interfaces· Volume 13· Issue 31
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Source abstract

Abstract

Safer human-robot interactions mandate the adoption of proprioceptive actuation. Strain sensors can detect the deformation of tools and devices in unstructured and capricious environments. However, such sensor integration in surgical/clinical settings is challenging due to confined spaces, structural complexity, and performance losses of tools and devices. Herein, we report a highly stretchable skin-like strain sensor based on a silver nanowire (AgNW) layer and hydrogel substrate. Our facile fabrication method utilizes thermal annealing to modulate the gauge factor (GF) by forming multidimensional wrinkles and a layered conductive network. The developed AgNW-hydrogel (AGel) sensors sustain and exhibit a strain-sensitive profile (max. GF = ∼70) with high stretchability (200%). Due to its conformability, the sensor demonstrates efficacy in integration and motion monitoring with minimal mechanical constraints. We provide contextual cognizance of tooltip during a transoral procedure by incorporating AGel sensors and showing the fabrication methodology's versatility by developing a hybrid self-sensing actuator with real-time performance feedback.
Source: openalex_inverted_index · Quality: baseline

Research context

PolymersNanomaterialsMaterials processing

OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Tactile and Sensory Interactions · Advanced Materials and Mechanics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117583

Department of Materials Science and Engineering, National University of Singapore, Blk EA, #03-09, 9 Engineering Drive 1, Singapore 117575

Institute of Materials, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015, Switzerland

Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China

Singapore Institute of Manufacturing Technology, A*STAR Singapore, Fusionopolis Two, 4 Fusionopolis Way, Singapore 138635

Department of Otolaryngology-Head and Neck Surgery, Singapore General Hospital, Singapore 169856

Duke-NUS Graduate Medical School, Singapore 169547

Department of Electronic Engineering and Shun Hing Institute of Advanced Engineering, The Chinese University of Hong Kong (CUHK), Hong Kong

Funding

Ministry of Science and Technology of the People's Republic of China · Ministry of Education - Singapore · Shun Hing Institute of Advanced Engineering

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