Porous silicon layers used for gas sensor applications

Foucaran, A.; Pascal‐Delannoy, F.; Giani, Alain; Sackda, A.; Combette, Philippe; Boyer, André

doi:10.1016/s0040-6090(96)09437-0

Cited by 93 publications

(47 citation statements)

References 12 publications

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“…On porous Si, the reaction can be thermal [85], photochemical [89,90], or Lewis acid catalyzed [80,81]. (5) Thermal hydrosilylation provides a means to place a wide variety of organic functional groups on a crystalline Si or porous Si surface [80]. The main requirement of the reaction is that the silicon surface contains Si-H species so they can react with a terminal alkene on the organic fragment.…”

Section: Hydrosilylation To Produce Si-c Bondsmentioning

confidence: 99%

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Porous silicon in drug delivery devices and materials☆

Anglin

Cheng

Freeman

et al. 2008

Advanced Drug Delivery Reviews

801

618

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Porous Si exhibits a number of properties that make it an attractive material for controlled drug delivery applications: The electrochemical synthesis allows construction of tailored pore sizes and volumes that are controllable from the scale of microns to nanometers; a number of convenient chemistries exist for the modification of porous Si surfaces that can be used to control the amount, identity, and in vivo release rate of drug payloads and the resorption rate of the porous host matrix; the material can be used as a template for organic and biopolymers, to prepare composites with a designed nanostructure; and finally, the optical properties of photonic structures prepared from this material provide a self-reporting feature that can be monitored in vivo. This paper reviews the preparation, chemistry, and properties of electrochemically prepared porous Si or SiO 2 hosts relevant to drug delivery applications.

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Section: Hydrosilylation To Produce Si-c Bondsmentioning

confidence: 99%

“…Porous Si has been investigated for applications in microelectronics, optoelectronics, [1][2][3][4] chemical [5,6] and biological [7][8][9][10] sensors, and biomedical devices [11]. The in vivo use of porous Si was first promoted by Leigh Canham, who demonstrated its resorbability and biocompatibility in the mid 1990s [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Porous silicon in drug delivery devices and materials☆

Anglin

Cheng

Freeman

et al. 2008

Advanced Drug Delivery Reviews

801

618

View full text Add to dashboard Cite

show abstract

“…[28] Depositing a selected nanoporous surface with metal oxide nanoparticles/clusters introduces new selective sites on the nanostructured substrate resulting in a modification of the response to a specified analyte gas. It is this etched PS structure that provides both for a combination of rapid Fickian diffusion [2a] into the readily observable micropores followed by a limiting Knudsen diffusion [16] into the nanopore wall coating of the micropores.…”

Section: à2mentioning

confidence: 99%

Nanostructure‐Directed Physisorption vs Chemisorption at Semiconductor Interfaces: The Inverse of the HSAB Concept

2010

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A concept, complementary to that of hard and soft acid-base interactions (HSAB-dominant chemisorption) and consistent with dominant physisorption to a semiconductor interface, is presented. We create a matrix of sensitivities and interactions with several basic gases. The concept, based on the reversible interaction of hard-acid surfaces with soft bases, hard-base surfaces with soft acids, or vice versa, corresponds 1) to the inverse of the HSAB concept and 2) to the selection of a combination of semiconductor interface and analyte materials, which can be used to direct a physisorbed vs chemisorbed interaction. The technology, implemented on nanopore coated porous silicon micropores, results in the coupling of acid-base chemistry with the depletion or enhancement of majority carriers in an extrinsic semiconductor. Using the inverse-HSAB (IHSAB) concept, significant and predictable changes in interface sensitivity for a variety of gases can be implemented. Nanostructured metal oxide particle depositions provide selectivity and complement a highly efficient electrical contact to a porous silicon nanopore covered microporous interface. The application of small quantities (much less than a monolayer) of nanostructured metals, metal oxides, and catalysts which focus the physisorbtive and chemisorbtive interactions of the interface, can be made to create a range of notably higher sensitivities for reversible physisorption. This is exemplified by an approach to reversible, sensitive, and selective interface responses. Nanostructured metal oxides developed from electroless gold (Au(x)O), tin (SnO(2)), copper (Cu(x)O), and nickel (NiO) depositions, nanoalumina, and nanotitania are used to demonstrate the IHSAB concept and provide for the detection of gases, including NH(3), PH(3), CO, NO, and H(2)S, in an array-based format to the sub-ppm level.

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“…На основании открытого свойства SO 2 гасить ФЛ ПК, предложена модель опти-ческого биосенсора для определения этого экологически вредного газа [62]. О возможно-сти использования ПК для разработки газо-вых сенсоров сообщалось также в работе [63], в которой исследовали электрические харак-теристики (зависимость силы тока от прило-женного напряжения) структуры золото-ПК в условиях наличия разнообразных газов.…”

Section: пористый кремний и сенсорные устройстваunclassified

Biosensors Based on the Photoluminescence of Porous Silicon. Overall Characteristics and Application

Стародуб¹,

Starodub²

2014

SEMST

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Porous silicon layers used for gas sensor applications

Cited by 93 publications

References 12 publications

Porous silicon in drug delivery devices and materials☆

Porous silicon in drug delivery devices and materials☆

Nanostructure‐Directed Physisorption vs Chemisorption at Semiconductor Interfaces: The Inverse of the HSAB Concept

Biosensors Based on the Photoluminescence of Porous Silicon. Overall Characteristics and Application

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