Mechanistic studies on the formation of silver nanowires by a hydrothermal method

► Cl− ions and reaction conditions are important for preparation of Ag nanowires. ► Ag nanowire surfaces possessed carbon-based layer derived from glucose. ► Diameter of Ag nanowires increased with reaction time. ► Carbon-based layer possessing carboxyl groups bound with Ag+ ions could be produced. ► Surface energy differences in Ag crystals led to anisotropic growth of Ag particles.