This poster will present the microneedle array device designed for harvesting photosynthetic electrons from multiple microalgae. The microelectrode array is prepared by a template-synthesis method . This method allows us to prepare an array of protruding, gold microelectrodes, whose diameter and length can easily be tuned. For our current objective, we fabricated the arrays of ~0.2 million gold microelectrodes. We demonstrated that those microneedle arrays can be used to impale the hard cell walls of microalgae, Chlamydomonas reinhardtii, by applying centrifugal forces. With our set up, multiple microalgae cells can be simultaneously impaled in controllable ways. We will also discuss how coating the gold microneedle array with an alumina layer reduces the amount of noise seen in during chronoamperometry. The details of each procedure will be discussed further in the presentation.
References:  Mukaibo, Hitomi et al. “Controlling the Length of conical Pores Etched in Ion-Tracked Poly(ethylene terephthalate) Membranes”. Small, 2009, 5(21), 2474-2479.