Use of a nanoparticle film having metal ions incorporated

A technology of nanoparticles and metal ions, which is applied in the direction of measuring devices, instruments, and material analysis through electromagnetic means, which can solve the problems of insufficient sensitivity and achieve high sensitivity and enhanced sensitivity

Inactive Publication Date: 2009-09-23
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, artificial sensors have not been sensitive enough to mimic the natural human or animal olfactory system and detect the compounds with enhanced sensitivity

Method used

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  • Use of a nanoparticle film having metal ions incorporated
  • Use of a nanoparticle film having metal ions incorporated
  • Use of a nanoparticle film having metal ions incorporated

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0042] Enhanced Sensitivity for 1-Butylamine Detection at 100 ppb Realized by Incorporation of Co Ions into AuDAC

[0043] As described in EP1022560, nanoparticle films are prepared by layer-by-layer growth. As described in EP06006881, gold nanoparticles were used as the metal component, while 1,4,10,13-tetraoxa-7,16-diazacyclooctadecane with CS 2 and triethylamine were reacted in-situ in toluene to form bisdithiocarbamate (DAC), which was used as the linker solution. Subsequently, the as-prepared film was immersed in Co(NO 3 ) 2 *6H 2 O middle. figure 1 The response trace of the film to 100 ppb of 1-butylamine is shown compared to a reference sensor immersed in pure isopropanol only. The response of the metal-doped film is much higher than that of the undoped material.

example 2

[0045] Enhanced sensitivity for 10ppb detection of 1,5-pentanediamine achieved by incorporation of Cu ions into AuDT

[0046] As described in EP1022560, nanoparticle films are prepared by layer-by-layer growth. Gold nanoparticles were used as the metal component, and 1,12-dodecanedithiol was used as the linker in toluene solution. Subsequently, the as-prepared films were immersed in Cu(ClO 4 ) 2 *6H 2 O middle. figure 2 The response trace of the film to 10 ppb of 1,5-pentanediamine is shown compared to a reference sensor immersed in pure isopropanol only. The response of the metal-doped film is much higher than that of the undoped material.

example 3

[0048] Enhanced Sensitivity for 20ppb Methanthiol Detection by Incorporation of Hg Ions

[0049] As described in EP1022560, nanoparticle films are prepared by layer-by-layer growth. Gold nanoparticles were used as the metal component, and 1,12-dodecanedithiol was used as the linker in toluene solution. Subsequently, the as-prepared films were immersed in Hg(ClO 4 ) 2 middle. image 3 The response trace of the film to 20 ppb of methyl mercaptan is shown compared to a reference sensor immersed in pure methanol alone. The response of the metal-doped film is much higher than that of the undoped material.

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Abstract

The present invention relates to the use of a nanoparticle film having metal ions incorporated and to a method for detecting a gaseous or volatile or liquid analyte in a medium. The method comprises the following steps: providing a sensor comprising a nanometer particle film; and if the analyte exists, exposing the sensor to the medium and measuring the response based on the conductivity change. In the film, preferably the nanometer particles are linked though an organic linking agent. The film is incorporated with metal ions. The nanometer particle film represents the conductivity change when the gaseous or volatile or liquid analyte exists.

Description

technical field [0001] The present invention relates to the use of nanoparticle films doped with metal ions and to methods for detecting gaseous or volatile or liquid analytes in media. Background technique [0002] Nanoparticle thin films are useful in many applications, such as molecular electronic devices, eg chemical sensors. For stabilization, nanoparticles in such films can be capped or linked by capping molecules or linker molecules. One method of forming such films of nanoparticles linked to molecules is layer-by-layer self-assembly (EP 1 022 560). Here, the substrate is alternately immersed in a nanoparticle solution / dispersion and a solution of organic molecules, such as dithiol (Joseph, et al., J.Phys.Chem.B 2003, 107, 7406) and bis( Dithiocarbamate) (bis(dithiocarbamate)) (Wessels et al., J. An. Chem. Soc., 2004, 126, 3349). This leads to the assembly of the material in the nanoparticle film, where the nanoparticles are linked. While nanoparticles in said fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/00
CPCG01N33/54346G01N27/127Y10T436/182
Inventor Y·约瑟夫N·克拉斯特瓦
Owner SONY CORP
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