Abstract
Multifunctional biomaterials can pave a way to novel types of micro- and nanoelectromechanical systems providing benefits in mimicking of biological functions in implantable, wearable structures. The production of biocomposites that hold both superior electrical and mechanical properties is still a challenging task. In this study, we aim to fabricate 3D printed hydrogel from a biocomposite of bovine serum albumin with graphene oxide (BSA@GO) using femtosecond laser processing. We have developed the method for functional BSA@GO composite nanostructuring based on both two-photon polymerization of nanofilaments and direct laser writing. The atomic-force microscopy was used to probe local electrical and mechanical properties of hydrogel BSA@GO nanowires. The improved local mechanical properties demonstrate synergistic effect in interaction of femtosecond laser pulses and novel composite structure.
Highlights
Bio-inspired nanoelectromechanical devices (NEMS) are actively rising technology in advanced functional systems paving the way for modern technology of soft, stretchable, self-healing next-generation systems [1,2]
We have developed the method for functional bovine serum albumin with graphene oxide (BSA@GO) composite nanostructuring based on both two-photon polymerization of nanofilaments and direct laser writing
Both bovine serum albumin (BSA) and BSA@GO solutions were stored in a refrigerator at +4 ◦C and were stable within two weeks
Summary
Bio-inspired nanoelectromechanical devices (NEMS) are actively rising technology in advanced functional systems paving the way for modern technology of soft, stretchable, self-healing next-generation systems [1,2]. Using nanocarbon materials like carbon nanotubes (CNT) and graphene in complex composites improves its electro-active and scaffold properties. These materials were successfully implemented in the development of pH sensitive hydrogels where swelling rate is dependent either on alkaline or acid environments [3,4]. Polymerization of bovine serum albumin (BSA) molecules is possible either by direct single-photon processing under UV irradiation [7], thermal treatment [8], or two-photon polymerization (TPP) [9,10]. Femtosecond laser programmed artificial musculoskeletal system was proposed for soft smart muscle based on pH-responsive BSA [10]
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