Publications

Supersensitive Detection of Explosives by Silicon Nanowire Arrays | Technology Article

This study demonstrates a rapid, label-free, real-time, supersensitive, and selective detection for TNT with the use of large arrays of chemically modified SiNW-FETs with a detection limit that reaches the part per quadrillion (ppq) concentration range. The results also show that TNT can be distinguished from other related compounds, with or without nitro groups, and exhibit a clear concentration dependent conductance response for TNT. This approach represents the first generation of selective and supersensitive electronic sensing arrays intended for the detection of TNT and other explosives. >>Download PDF

Confinement-Guided Shaping of Semiconductor Nanowires and Nanoribbons: “Writing with Nanowires” | Technology Article

We demonstrate a simple confinement-guided nanowire growth method that enables to pre-design the chemical and physical attributes of the synthesized nanowires and also allows a perfect and unlimited control over their geometry. Our method allows the synthesis of semiconductor nanowires in a wide variety of two-dimensional shapes, so that practically any desired geometry can be defined. The shape-controlled nanowires can be grown on almost any substrate such as silicon wafer, quartz and glass slides, and even on plastic substrates. >>Download PDF

Supersensitive fingerprinting of explosives by chemically modified nanosensors arrays| Technology Article

The capability to detect traces of explosives sensitively, selectively and rapidly could be of great benefit for applications relating to civilian national security and military needs. Here, we show that, when chemically modified in a multiplexed mode, nanoelectrical devices arrays enable the supersensitive discriminative detection of explosive species. The fingerprinting of explosives is achieved by pattern recognition of the inherent kinetics, and thermodynamics, of the interaction between the chemically modified nanosensors array and the molecular analytes under test. This platform allows for the rapid detection of explosives, from air samples, down to the parts-per-quadrillion concentration range, and represents the first nanotechnology-inspired demonstration on the selective ultra sensitive detection of explosives, including the nitro- and peroxide-derivatives, on a single electronic platform. Furthermore, the ultrahigh sensitivity displayed by our platform may allow the remote detection of various explosives.>>Download PDF

Knocking Down Highly-Ordered Large-Scale Nanowire Arrays | Technology Article

A universal approach, based on the controlled in-place planarization of nanowire elements, for the formation of large-scale ordered nanowire arrays. The controlled planarization of the nanowires is achieved by the use of an appropriate elastomer-covered rigid-roller device. After being knocked down, each nanowire in the array can be easily addressed electrically, by a simple single photolithographic step, to yield a large number of nano-electrical devices with an unprecedented high-fidelity rate. The resulting knocked-down arrays can be further used for the creation of massive nano-electronic device arrays. More than million devices were already fabricated with yields over 98% >>Download PDF

Functionalized Nanostructires for Detecting Nitro Containing Compounds | Patent Pending

PCT/IL2011/000443 – A method and devices for the detection of chemicals, particularly useful for detecting ultra-trace amounts of nitro-containing chemicals such as explosives in both liquid and gaseous phase. This approach represents the first generation of selective and supersensitive electronic sensing arrays intended for the detection of diverse explosives. >>Download PDF

Nanostructure and Process of Fabricating Same | Patent Pending

PCT/IB2012/050002 - A simple and robust confinement guided nanowire growth method that enables one to pre-design not only the chemical and physical attributes of the synthesized nanowires, but also allows a perfect and unlimited control over their geometry and location. Via the vapor−liquid−solid (VLS) mechanism, we could grow semiconductor nanowires of different compositions in a wide variety of two-dimensional shapes, such as any kinked (different turning angles), sinusoidal, linear, and spiral shapes, so that practically any desired geometry can be defined. >>Download PDF

Aligned Nanoarray and Method for Fabricating the Same | Registered Patent

PCT/IL2010/000649 – A method for the formation of large-scale ordered nanowire arrays by the “knock-down” scheme. The knocked down arrays yield a large number of nano-electrical devices with an unprecedented high-fidelity rate which can be further used for the creation of massive nano-electronic device arrays >>Download PDF

Systems and Methods for Identifying Explosives | Patent Pending

A method and a system for identifying an explosive in a sample. The method comprises receiving an explosive fingerprint defined by a set of kinetic parameters, describing a plurality of interactions between the explosive and each of a respective group of functional moieties. The method further comprises accessing a database of explosive fingerprints, and searching the database for a matching fingerprint. The system includes numerous sensing devices, each comprising semiconductor nanostructures (e.g. Si nanowires) having attached a functional moiety selected to interact with a nitro-containing and/or peroxide-containing explosive sample. >>Download PDF