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Patterned Nanowire Electrode Array for Direct Extraction of Photosynthetic Electrons from Multiple Living Algal Cells
Author(s) -
Kim Lo Hyun,
Kim Yong Jae,
Hong Hyeonaug,
Yang Dasom,
Han Myungjin,
Yoo Gu,
Song Hyun Woo,
Chae Youngcheol,
Pyun JaeChul,
Grossman Arthur R.,
Ryu WonHyoung
Publication year - 2016
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201602171
Subject(s) - nanowire , materials science , dcmu , electron , reagent , electrode , extraction (chemistry) , photosynthesis , photolithography , optoelectronics , nanosphere lithography , electron transport chain , light intensity , photosystem ii , nanotechnology , chemistry , optics , botany , physics , biology , fabrication , medicine , quantum mechanics , chromatography , alternative medicine , pathology
An electrochemically active nanowire system is fabricated using wet‐tapped nanosphere lithography and a single photolithography step. The patterned nanowire/nanoelectrode is inserted into live algal cells, enabling the potential harvesting of photosynthetic electrons from multiple cells simultaneously. Light‐dependent extraction of electrons from cells is observed; these electrons are derived from the photosynthetic electron transport chain based on a light intensity‐dependence of the reaction coupled with the finding that electron extraction is inhibited in the presence of DCMU (3‐(3,4‐dichlorophenyl)‐1,1‐dimethylurea), a reagent that specifically blocks electron flow out of photosystem II. Insertion of nanoelectrodes into multiple algal cells is achieved, and sequential insertion of cells with the nanoelectrode, followed by subsequent removal of the electrode, yields a corresponding increase and then decrease in light‐driven currents. Controlling the intensity of the illumination avoids nearly all photodamage and enables direct extraction of more photosynthetic electrons from multiple cells in parallel, which is sustained for an extended period of time.