▎ 摘　　要

NOVELTY - Method of preparation of silver dendrites using graphene electrodes, involves synthesizing silver dendrites in an electrochemical cell using two graphene electrodes, one as cathode and other as anode for direct current (DC) power supply and silver nitrate solution (electrolyte) as precursor of silver, where the preparation of graphene electrodes includes: (a) putting graphene powder synthesized using shellac in steel box, (b) placing the box inside a vaccum chamber and heating to form graphene powder; (c) preparing graphene paste by mixing graphene powder in an organic solvent that comprises terpineol, dipropylene glycol methyl ether, cyclohexanone, sorbitan trioleate, and ethyl cellulose in a ball mill; (d) preparing two graphene electrodes by coating graphene paste onto plastic substrates and drying in air; and (e) preparing silver dendrites using graphene electrodes in an electrochemical cell, two graphene electrodes simply dipped into silver nitrate solution. USE - Method for preparation of silver dendrites using graphene electrodes, used for catalysis, surface enhanced Raman spectroscopy, surface enhanced fluorescence, superhydrophobic surface, biosensing, and electrochemical sensors for detecting various chemical and biological molecules. ADVANTAGE - The method provides silver dendrites having high surface area and interfacial structures that enhance certain desired properties. The silver dendrites were fabricated using a simple, low-cost and one-step method using graphene electrodes, and the silver dendrites can be fabricated with well-defined and highly crystalline. The graphene electrodes used in the method are very easy to prepare and are inexpensive, and are prepared by coating graphene paste onto plastic substrates. The method is simple, rapid, and cost-effective and is easily accessible by industrial process, and is industrial compatible to achieve mass-production of silver dendrites. DETAILED DESCRIPTION - Method of preparation of silver dendrites using graphene electrodes, involves synthesizing silver dendrites in an electrochemical cell using two graphene electrodes, one as cathode and other as anode for direct current (DC) power supply and silver nitrate solution (electrolyte) as precursor of silver, where the preparation of graphene electrodes includes: (a) putting graphene powder synthesized using shellac as a carbon source in steel box and closing properly, (b) subsequently, placing the box containing the shellac flakes inside a vaccum (base pressure to ~10-2Torr) chamber and heating at 850° C for 15 minutes to form graphene powder; (c) after the preparation of graphene powder as, preparing graphene paste by mixing 20 wt.% graphene powder in an organic solvent that comprises 45 wt.% terpineol, 38 wt.% dipropylene glycol methyl ether, 8 wt.% cyclohexanone, 2 wt.% sorbitan trioleate, and 5 wt.% ethyl cellulose in a ball mill; (d) preparing two graphene electrodes by coating graphene paste onto plastic substrates (having area of 3.5 cm x 5 cm) and drying in air for half an hour; and (e) Subsequently, preparing silver dendrites using graphene electrodes in an electrochemical cell, two graphene electrodes simply dipped into silver nitrate solution (having optimum concentration of 5 mg/ml), and an optimum 5 V DC voltage applied between the cathode and anode electrodes.