Isopropanol and acetone

The following chemicals and materials were used as received: Nano SU-8 developer, SU-8 50 photoresist (Microchem, Newton, MA, USA); silicon wafers (University Wafers, Boston, MA, USA); fused silica capillary (Polymicro Technologies, Phoenix, AZ, USA); catechol, dopamine, boric acid, TES sodium salt, sodium dodecyl sulfate, potassium nitrate, Hanks balanced saline solution (HBSS), chloroplatinic acid hydrate, and lead (II) acetate trihydrate (Sigma Aldrich, St. Louis, MO, USA); Sylgard 184 (Ellsowrth Adhesives, Germantown, WI, USA); 100 μm gold wire (Alfa Aesar, Ward Hill, MA, USA); heat shrink tubes (Radioshack); isopropanol and acetone (Fisher Scientific, Springfield, NJ, USA); colloidal silver (Ted Pella, Redding, CA, USA); polishing pads (Buehler, Lake Bluff, IL, USA); disposable aluminum dishes (Fisher Scientific); NO tank (99.5%; Airgas, Radnor, PA, USA); PS powder (Goodfellow Cambridge, Huntingdon, England); Shrinky-Dinks© Crystal Clear (K & B Innovations, Inc. North Lake, WI, USA); isophorone (Ercon, Wareham, MA, USA); Apache laminator model AL13P (Apache Laminators).

The following chemicals and materials were used as received: 0.5 mm gold wire, 0. 5 mm silver wire, firefly lantern extract, catechol, dopamine hydrochloride, chloroplatinic acid hydrate, lead (II) acetate trihydrate, Hanks’ balanced salt solution (HBSS), TES (Trizma acetate, ethylenediaminetetraacetic acid (EDTA), sucrose) buffer, and potassium nitrate (Sigma Aldrich, St. Louis, MO); Armstrong C-7 resin, Activator A and E (Ellsworth Adhesives, Germantown, WI); silver conductive epoxy (MG Chemicals, Burlington, ON, Canada); J-B Kwik (J-B Weld Co., Sulphur Springs, TX); 250 and 500 μm platinum wire, 2 mm palladium wire, and 1 mm glassy carbon rod (Alfa Aesar, Ward Hill, MA); soldering wire and heat shrink tubes (Radio Shack); isopropanol and acetone (Fisher Scientific, Springfield, NJ); colloidal silver (Ted Pella, Redding, CA); electrode polishing pads (CH Instruments, Austin, TX; Allied High Tech Products, Inc., Rancho Dominguez, CA); nitric oxide (NO) tank (99.5%) (Airgas Inc., Radnor, PA); polyetheretherketone (PEEK) fitting nuts (P-131: 1/8” outer diameter (o.d.) tubing, P-137: 3/16” o.d. tubing), one-piece finger tight fittings for 1/16” o.d. tubing (IDEX Health & Science, Oak Harbor, WA); Nafion (5% w/w Nafion, Ion Power Inc., New Castle, DE or Sigma Aldrich, St. Louis, MO).