Gold Nanowires for the Detection of Elemental and Ionic Mercury

Keebaugh, Shawn; Kalkan, A. Kaan; Nam, Wook Jun; Fonash, Stephen J.

doi:10.1149/1.2217130

Cited by 32 publications

(18 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite the possibilities presented by metal nanowires for chemical sensing, relatively little attention has been given to the application of metal nanowires as resistive sensors 4–6, 9–25. In addition, the studies that have appeared present different saturation values of normalized resistance change (Δ R max / R 0 ).…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the magnitude of Δ R max / R 0 not only correlates to the dimensions of the nanowires, but also depends on the different metal materials and the sensing species. Unfortunately, there are few systematic studies of the sensitivity of metal‐nanowire chemical sensors, except for a single report examining the correlation of Δ R max / R 0 with the thickness of Au nanowires used for detecting ionic mercury 21…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Molecular Adsorption on the Electrical Conductance of Single Au Nanowires Fabricated by Electron‐Beam Lithography and Focused Ion Beam Etching

Shi

Zhang

Lin

et al. 2010

Small

View full text Add to dashboard Cite

Metal nanowires are one of the potential candidates for nanostructured sensing elements used in future portable devices for chemical detection; however, the optimal methods for fabrication have yet to be fully explored. Two routes to nanowire fabrication, electron-beam lithography (EBL) and focused ion beam (FIB) etching, are studied, and their electrical and chemical sensing properties are compared. Although nanowires fabricated by both techniques exhibit ohmic conductance, I-V characterization indicates that nanowires fabricated by FIB etching exhibit abnormally high resistivity. In addition, the resistivity of nanowires fabricated by FIB etching shows very low sensitivity toward molecular adsorption, while those fabricated by EBL exhibit sensitive resistance change upon exposure to solution-phase adsorbates. The mean grain sizes of nanowires prepared by FIB etching are much smaller than those fabricated by EBL, so their resistance is dominated by grain-boundary scattering. As a result, these nanowires are much less sensitive to molecular adsorption, which mediates nanowire conduction through surface scattering. The much reduced mean grain sizes of these nanowires correlate with Ga ion damage caused during the ion milling process. Thus, even though the nanowires prepared by FIB etching can be smaller than their EBL counterparts, their reduced sensitivity to adsorption suggests that nanowires produced by EBL are preferred for chemical and biochemical sensing applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Molecular Adsorption on the Electrical Conductance of Single Au Nanowires Fabricated by Electron‐Beam Lithography and Focused Ion Beam Etching

Shi

Zhang

Lin

et al. 2010

Small

View full text Add to dashboard Cite

show abstract

“…The simple design, specificity and high sensitivity provided by a particular enzyme appear promising. Metallic nanowires, in particular Au nanowires (Au-NW) are very promising as smart building blocks in emerging electronic and sensing applications [9][10][11][12]. They offer higher capture efficiency, faster response time due to their large adsorption surface (large surface to volume ratio >1000 m 2 /g), high electrical conductivity and small diffusion time [13,14].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical biosensor for targeted detection in blood using aligned Au nanowires

Aravamudhan

Ramgir

Bhansali

2007

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

“…Additional time is caused by the adsorption of Hg 0 traces from the surrounding environment (measuring chamber) up to the achievement of a sufficient number of Hg 0 atoms adsorbed on the surface sensor to be electrically revealed. However, this sensor looks extremely encouraging if compared to other sensors currently involved in detecting mercury in air (Drelich et al, 2008;Kabir et al, 2015;Sabri et al, 2009;Mohibul Kabir et al, 2015;Raffa et al, 2006;James et al, 2012James et al, , 2013Chemnasiri and Hernandez, 2012;Sabri et al, 2011;Keebaugh et al, 2007;Crosby, 2013;McNicholas et al, 2011).…”

Section: Resultsmentioning

confidence: 93%

A smart nanofibrous material for adsorbing and detecting elemental mercury in air

et al. 2017

View full text Add to dashboard Cite

Abstract. The combination of the affinity of gold for mercury and nanosized frameworks has allowed for the design and fabrication of novel kinds of sensors with promising sensing features for environmental applications. Specifically, conductive sensors based on composite nanofibrous electrospun layers of titania easily decorated with gold nanoparticles were developed to obtain nanostructured hybrid materials capable of entrapping and revealing gaseous elemental mercury (GEM) traces from the environment. The electrical properties of the resulting chemosensors were measured. A few minutes of air sampling were sufficient to detect the concentration of mercury in the air, ranging between 20 and 100 ppb, without using traps or gas carriers (LOD: 1.5 ppb). Longer measurements allowed the sensor to detect lower concentrations of GEM. The resulting chemosensors are expected to be low cost and very stable (due to the peculiar structure), requiring low power, low maintenance, and simple equipment.

show abstract

Gold Nanowires for the Detection of Elemental and Ionic Mercury

Cited by 32 publications

References 21 publications

Effect of Molecular Adsorption on the Electrical Conductance of Single Au Nanowires Fabricated by Electron‐Beam Lithography and Focused Ion Beam Etching

Effect of Molecular Adsorption on the Electrical Conductance of Single Au Nanowires Fabricated by Electron‐Beam Lithography and Focused Ion Beam Etching

Electrochemical biosensor for targeted detection in blood using aligned Au nanowires

A smart nanofibrous material for adsorbing and detecting elemental mercury in air

Contact Info

Product

Resources

About