title: DNA hydrogel-based supercapacitors operating in physiological fluids.
abstract: DNA nanostructures have been attractive due to their structural properties resulting in many important breakthroughs especially in controlled assemblies and many biological applications. Here, we report a unique energy storage device which is a supercapacitor that uses nanostructured DNA hydrogel (Dgel) as a template and layer-by-layer (LBL)-deposited polyelectrolyte multilayers (PEMs) as conductors. Our device, named as PEM-Dgel supercapacitor, showed excellent performance in direct contact with physiological fluids such as artificial urine and phosphate buffered saline without any need of additional electrolytes, and exhibited almost no cytotoxicity during cycling tests in cell culture medium. Moreover, we demonstrated that the PEM-Dgel supercapacitor has greater charge-discharge cycling stability in physiological fluids than highly concentrated acid electrolyte solution which is normally used for supercapacitor operation. These conceptually new supercapacitors have the potential to be a platform technology for the creation of implantable energy storage devices for packageless applications directly utilizing biofluids.
authors: Frontier Research Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics, Yongin, Kyunggi-do, South Korea.
authors: Jaehyun
authors: J
authors: Hur
authors: Kyuhyun
authors: K
authors: Im
authors: Sekyu
authors: S
authors: Hwang
authors: ByoungLyong
authors: B
authors: Choi
authors: Sungjee
authors: S
authors: Kim
authors: Sungwoo
authors: S
authors: Hwang
authors: Nokyoung
authors: N
authors: Park
authors: Kinam
authors: K
authors: Kim
mesh_terms: D002478:Cells, Cultured; D003470:Culture Media; D004247:DNA / Q000737:chemistry*; D025802:Electric Capacitance; D011211:Electric Power Supplies; D004573:Electrolytes; D006801:Humans; D020100:Hydrogels / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry; D011108:Polymers
chemical_list: D003470:Culture Media; D004573:Electrolytes; D020100:Hydrogels; D011108:Polymers; D004247:DNA