Nanoporous silicon explosive devices

Plessis, Monuko du

doi:10.1016/j.mseb.2007.08.010

Cited by 33 publications

(28 citation statements)

References 6 publications

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“…Porous silicon is a versatile material with uses in a broad range of technological fields including energetic materials [1][2][3][4], and a variety of sensing applications [5][6][7]. Several of its material characteristics, including high surface area, energy density, and MEMS compatibility make PS a particularly interesting candidate for the field of energetic materials.…”

Section: Introductionmentioning

confidence: 99%

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Combustion and material characterization of porous silicon nanoenergetics

Piekiel

Churaman

Morris

et al. 2013

2013 IEEE 26th International Conference on Micro Electro Mechanical Systems (MEMS)

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Certain porous silicon (PS) structures have demonstrated energetic characteristics when mixed with an appropriate oxidizer [1][2][3][4]. However, limited studies on the effect of PS structure on its combustion have been performed. This work investigates how various material properties of PS films; surface area, porosity and pore size, affect the combustion process. With pore sizes in the range of 2.6-5.2 nm and surface area reaching over 900 m 2 /g, these materials are capable of considerably fast reactions. Combustion characterization is performed through high speed imaging at a rate of 930,000 frames per second. Propagation speeds in the current study range from 300 -1950 m/s, and some relationships between the pore characteristics and the propagation velocity are observed.A portion of the silicon is covered by a layered Si 3 N 4 /chrome/platinum/gold section that functions as an

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Section: Introductionmentioning

confidence: 99%

“…

…”

mentioning

confidence: 99%

Combustion and material characterization of porous silicon nanoenergetics

Piekiel

Churaman

Morris

et al. 2013

2013 IEEE 26th International Conference on Micro Electro Mechanical Systems (MEMS)

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“…To qualitatively evaluate the nano-explosive characteristics, we defined a figure of merit (FOM), which gave an estimate of the energy released by the nano-explosion [13]. This figure of merit took into account the sound caused by the explosion, the integral of the optical signal emitted from the explosion, the distance that particles or debris were projected outward, and the physical damage done to the silicon sample.…”

Section: Explosive Figure Of Meritmentioning

confidence: 99%

“…Using an aluminium thin film fuse of thickness 1 micron, width of 150 micron and length of 600 micron, it has been shown that a nano-explosion using NaClO 4 as oxidant could be detonated within 100 µs [13], well within the 1 millisecond detonation time specified by the mining industry for their electronic detonation systems. The oxidants Gd(NO 3 ) 3 and S took longer than 100 µs to detonate, but less than 1 ms.…”

Section: Explosive Figure Of Meritmentioning

confidence: 99%

Investigating nanoporous silicon explosive devices

Plessis¹

2009

Phys. Status Solidi (c)

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The explosive properties of nanoporous silicon, impregnated with an oxidant, were researched. A structural model was used to extract the pore and crystallite dimensions from gravimetric measurements, as well as the specific surface area, porosity and statistical distribution of crystallite diameters. The properties of three different oxidants were investigated. It was found that there is an optimum pore size for the most energetic explosion. It was also demonstrated that the nano‐explosion could be initiated within 100 μs using NaClO4 as oxidant and a thin film aluminium fuse as heating element. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…3 pSi energetic materials prepared in this way are sensitive to a wide variety of stimuli. Methods of initiation that have been reported include heating on a hot-plate 4 or by a hot bridge-wire, 5,6 mechanical stimulus (such as scratching the surface or light friction), 7 or by an electrical spark. 7 Additionally, laser ignition of pSi energetic materials has been reported at a variety of wavelengths and laser fluences.…”

Section: Introductionmentioning

confidence: 99%

Laser shock ignition of porous silicon based nano-energetic films

Plummer

Кузнецов

Gascooke

et al. 2014

Journal of Applied Physics

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Nanoporous silicon films on a silicon wafer were loaded with sodium perchlorate and initiated using illumination with infrared laser pulses to cause laser thermal ignition and laser-generated shock waves. Using Photon Doppler Velocimetry, it was determined that these waves are weak stress waves with a threshold intensity of 131 MPa in the silicon substrate. Shock generation was achieved through confinement of a plasma, generated upon irradiation of an absorptive paint layer held against the substrate side of the wafer. These stress waves were below the threshold required for sample fracturing. Exploiting either the laser thermal or laser-generated shock mechanisms of ignition may permit use of pSi energetic materials in applications otherwise precluded due to their environmental sensitivity.

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Nanoporous silicon explosive devices

Cited by 33 publications

References 6 publications

Combustion and material characterization of porous silicon nanoenergetics

Combustion and material characterization of porous silicon nanoenergetics

Investigating nanoporous silicon explosive devices

Laser shock ignition of porous silicon based nano-energetic films

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