The DOI matches its Crossref record; 47 of the 47 references it cites were found in a registry or an index.
Self-Folding Thermo-Magnetically Responsive Soft Microgrippers
Open accessAbstract
Hydrogels such as poly(N-isopropylacrylamide-co-acrylic acid) (pNIPAM-AAc) can be photopatterned to create a wide range of actuatable and self-folding microstructures. Mechanical motion is derived from the large and reversible swelling response of this cross-linked hydrogel in varying thermal or pH environments. This action is facilitated by their network structure and capacity for large strain. However, due to the low modulus of such hydrogels, they have limited gripping ability of relevance to surgical excision or robotic tasks such as pick-and-place. Using experiments and modeling, we design, fabricate, and characterize photopatterned, self-folding functional microgrippers that combine a swellable, photo-cross-linked pNIPAM-AAc soft-hydrogel with a nonswellable and stiff segmented polymer (polypropylene fumarate, PPF). We also show that we can embed iron oxide (Fe2O3) nanoparticles into the porous hydrogel layer, allowing the microgrippers to be responsive and remotely guided using magnetic fields. Using finite element models, we investigate the influence of the thickness and the modulus of both the hydrogel and stiff polymer layers on the self-folding characteristics of the microgrippers. Finally, we illustrate operation and functionality of these polymeric microgrippers for soft robotic and surgical applications.
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Metadata
- Authors
- Breger, J. C., Yoon, C., Xiao, R., Kwag, H. R., Wang, M. O., Fisher, J. P., Nguyen, T. D., & Gracias, D. H.
- Venue
- ACS Applied Materials & Interfaces
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-01-28
- Volume
- 7
- Issue
- 5
- Pages
- 3398-3405
- ISSN
- 1944-8244 (ISSN-L)
- 1944-8252
- OpenAlex
- W2335171300
- Cited by
- 655
- References
- 47
- FWCI
- 40.54
- Type
- journal article
- Language
- en
- Open access
- hybrid
- Funders
- NIH Office of the Director (DP2-OD004346-01)
- National Institute of Arthritis and Musculoskeletal and Skin Diseases (R01 AR0614606)
- National Institute of Biomedical Imaging and Bioengineering (R01EB017742)
- National Institute of Dental and Craniofacial Research (R01 DE013740)
- Division of Chemical, Bioengineering, Environmental, and Transport Systems (CBET-1066898)
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