Nanotube Molecular Wires as Chemical Sensors

Abstract

Chemical sensors based on individual single-walled carbon nanotubes (SWNTs) are demonstrated. Upon exposure to gaseous molecules such as NO 2 or NH 3 , the electrical resistance of a semiconducting SWNT is found to dramatically increase or decrease. This serves as the basis for nanotube molecular sensors. The nanotube sensors exhibit a fast response and a substantially higher sensitivity than that of existing solid-state sensors at room temperature. Sensor reversibility is achieved by slow recovery under ambient conditions or by heating to high temperatures. The interactions between molecular species and SWNTs and the mechanisms of molecular sensing with nanotube molecular wires are investigated.

Keywords

Carbon nanotubeNanotubeMaterials scienceNanotechnologyMoleculeChemical physicsChemistryOrganic chemistry

Affiliated Institutions

Stanford University US

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Publication Info

Year: 2000
Type: article
Volume: 287
Issue: 5453
Pages: 622-625
Citations: 5989
Access: Closed

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APA Style

                            
                                
                                    Jing Kong, 
                                
                                    Nathan R. Franklin, 
                                
                                    Chongwu Zhou
                                
                                et al.
                            
                            (2000). 
                            Nanotube Molecular Wires as Chemical Sensors. 
                            Science
                            , 287
                            (5453)
                            , 622-625.
                            https://doi.org/10.1126/science.287.5453.622
                        

Identifiers

DOI: 10.1126/science.287.5453.622