Chemistry 2 (2016 9) 152-158 ~ ~ ~ УДК 662.249 Optical Detonator on the Basis of PETN Dopped with Cobalt Nanoparticles Anastasia P. Borovikovaa Alexander V. Kalenskiia , and Alexander A. Zvekovb a 6 Krasnaya Str., Kemerovo, 650043, Russia b Kemerovo State University Federal Research Center of Coal and Coal Chemistry SB RAS 18 Sovetsky, Kemerovo, 650000, Russia Received 29.12.2015, received in revised form 17.02.2016, accepted 16.04.2016 The optical detonator’s cup, performing selective sensitivity to laser radiation, was suggested. <...> The cup is based on the secondary explosive PETN, which contains cobalt nanoparticles. <...> The optimal nanoparticles’ size was estimated using hot-spot model of laser initiation. <...> The critical energy density for the suggested explosive composition for the cup was determined experimentally. <...> All rights reserved * Corresponding author E-mail address: kriger@kemsu.ru # 152 # Anastasia P. Borovikova, Alexander V. Kalenskii… Optical Detonator on the Basis of PETN Dopped with Cobalt… Оптический детонатор на основе ТЭНа, допированного наночастицами кобальта А. <...> In order to produce an optical detonator on the basis of secondary explosives it is necessary to significantly increase their sensitivity to the laser action. <...> The initiating thresholds of pentaerythritol tetranitrate (PETN) containing aluminum nanoparticles for the fi rst and second harmonics of Nd:YAG laser was studied in [6-11]. <...> Sensitivity of this material to the laser action is about 0.5 J/cm2 (sensitivity increases more than in 100 times comparing to undoped samples) while the threshold of shock initiation does not change. <...> The goal of this work is to study the possibility of optical detonator based on the PETN pressed pellet doped with cobalt nanoparticles with mass concentration 0.1 % creation. # 153 # Anastasia P. Borovikova, Alexander V. Kalenskii… Optical Detonator on the Basis of PETN Dopped with Cobalt… 2. <...> Experimental section and results The PETN powder with particles’ sizes 1-2 μm and the powder of cobalt with particles’ radii 100120 nm were used to prepare pellets. <...> The fi rst harmonics of the Nd:YAG laser (wavelength 1064 nm, pulse duration full width at half maximum 14 ns [2-7]) for initiation was used. <...> The metal sheath <...>