r0005">We demonstrate a microcautery implemented by an optical fiber with zinc nanoparticles photodeposited on its core.
r0010">We achieved a controllable heat “tip” via radiation intensity of a laser source.
r0015">We carried out cauterization and coagulation processes to induce hemostasis in blood vessels using rats.
r0020">The system is ideal to carry out micro cauterization processes.