Charge Transfer from Ammonia Physisorbed on Nanotubes

Keith Bradley; Jean‐Christophe P. Gabriel; Mikhail Briman; Alexander Star; G. Grüner

doi:10.1103/physrevlett.91.218301

Abstract

We report the use of nanotube field-effect transistor devices for chemical sensing in a conducting liquid environment. Detection of ammonia occurs through the shift of the gate voltage dependence of the source-drain current. We attribute this shift to charge transfer from adsorbed ammonia molecules, with the amount of charge estimated to be as small as 40 electrons for the smallest shift detected. Using the concentration dependence of the response as an adsorption isotherm, we are able to measure the amount of charge transfer to be 0.04 electron per ammonia molecule.

Keywords

AmmoniaMaterials scienceAdsorptionMoleculeCharge (physics)ElectronChemical physicsElectron transferAtomic physicsVoltageTransistorNanotechnologyMolecular physicsAnalytical Chemistry (journal)OptoelectronicsPhotochemistryChemistryPhysical chemistryPhysics

Affiliated Institutions

Nanōmix (United States) US

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Publication Info

Year: 2003
Type: article
Volume: 91
Issue: 21
Pages: 218301-218301
Citations: 192
Access: Closed

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APA Style

                            
                                
                                    Keith Bradley, 
                                
                                    Jean‐Christophe P. Gabriel, 
                                
                                    Mikhail Briman
                                
                                et al.
                            
                            (2003). 
                            Charge Transfer from Ammonia Physisorbed on Nanotubes. 
                            Physical Review Letters
                            , 91
                            (21)
                            , 218301-218301.
                            https://doi.org/10.1103/physrevlett.91.218301
                        

Identifiers

DOI: 10.1103/physrevlett.91.218301