Chemiresistors based on ultrathin gold nanowires for sensing halides, pyridine and dopamine

Muratova, Irina S.; Mikhelson, Konstantin N.; Ermolenko, Yu. Е.; Offenhäusser, Andreas; Mourzina, Yulia

doi:10.1016/j.snb.2016.03.151

Cited by 29 publications

(16 citation statements)

References 66 publications

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“…Adsorption of various molecules on the surface of a substrate can be detected by monitoring the electrical properties of the substrate material [1][2][3][4][5][6][7]. The substrate materials of these "chemiresistors" [2] should possess both nanostructures with high surface area and electrical conductivity. For example, adsorption of oxygen on carbon nanotubes [3,4] and protein on silicon nanowires [5,6] can be successfully detected.…”

Section: Introductionmentioning

confidence: 99%

Electrical resistivity of nanoporous gold modified with thiol self-assembled monolayers

Hakamada

Kato

Mabuchi

2016

Applied Surface Science

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The electrical resistivity of nanoporous gold (NPG) modified with thiol self-assembled monolayers (SAMs) has been measured at 298 K using a four-probe method. We found that the adsorption of thiol SAMs increases the electrical resistivity of NPG by up to 22.2%. Dependence of the electrical resistivity on the atmosphere (air or water) was also observed in SAMs-modified NPG, suggesting that the electronic states of the tail groups affect the electrons of the binding sulfur and adjacent surface gold atoms. The present results suggest that adsorption of thiol molecules can influence the behavior of the conducting electrons in NPG and that modification of NPG with SAMs may be useful for environmental sensing.

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Section: Introductionmentioning

confidence: 99%

Electrical resistivity of nanoporous gold modified with thiol self-assembled monolayers

Hakamada

Kato

Mabuchi

2016

Applied Surface Science

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“…In particular, Sn(IV)Ps are responsible for the selectivity to salicylate anions in ion-selective electrodes due to axial salicylate ligand binding to the metal center (Malinski, 2000; Skripnikova et al, 2017). In this study, we also examined the sensing properties of the H 4 TPPS42- –Sn(IV)TPyP 4+ nanorods based on their photoconductivity in a chemiresistor sensor mode (Muratova et al, 2016, Figure 8A). Figure 8B illustrates the change in the photocurrent of the nanostructures after exposure to Sal − -ions at room temperature.…”

Section: Resultsmentioning

confidence: 99%

“…To measure the (photo)conductance of the porphyrin nanorods, two types of thin-film gold electrodes were used: gold electrode pairs with an electrode gap of 400 nm, (Figure S1), and interdigitated electrode arrays with a 2 μm spacing between the electrode lines and an electrode line thickness of 2 μm. The electrodes were produced on a Si substrate with a silicon dioxide layer of 1,000 nm thickness using electron beam lithography, lift-off process, and thin-film technologies in an ISO 5 cleanroom as described in detail in Muratova et al (2016). Thin metal layers of titanium for adhesion (10 nm) and gold (50 nm) were deposited by means of an electron beam evaporation using a Pfeiffer PLS 500 equipment.…”

Section: Methodsmentioning

confidence: 99%

Photoresponsive Porphyrin Nanotubes of Meso-tetra(4-Sulfonatophenyl)Porphyrin and Sn(IV) meso-tetra(4-pyridyl)porphyrin

et al. 2019

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Porphyrin macrocycles and their supramolecular nanoassemblies are being widely explored in energy harvesting, sensor development, catalysis, and medicine because of a good tunability of their light-induced charge separation and electron/energy transfer properties. In the present work, we prepared and studied photoresponsive porphyrin nanotubes formed by the self-assembly of meso -tetrakis(4-sulfonatophenyl)porphyrin and Sn(IV) meso -tetra(4-pyridyl)porphyrin. Scanning electron microscopy and transmission electron microscopy showed that these tubular nanostructures were hollow with open ends and their length was 0.4–0.8 μm, the inner diameter was 7–15 nm, and the outer diameter was 30–70 nm. Porphyrin tectons, H 4 : Sn(IV)TPyP 4+ , self-assemble into the nanotubes in a ratio of 2:1, respectively, as determined by the elemental analysis. The photoconductivity of the porphyrin nanotubes was determined to be as high as 3.1 × 10 −4 S m −1 , and the dependence of the photoconductance on distance and temperature was investigated. Excitation of the Q-band region with a Q-band of SnTPyP 4+ (550–552 nm) and the band at 714 nm, which is associated with J-aggregation, was responsible for about 34 % of the photoconductive activity of the H 4 -Sn(IV)TPyP 4+ porphyrin nanotubes. The sensor properties of the H 4 - Sn(IV)TPyP 4+ nanotubes in the presence of iodine vapor and salicylate anions down to millimolar range were examined in a chemiresistor sensing mode. We have shown that the porphyrin nanotubes advantageously combine the characteristics of a sensor and a transducer, thus demonstrating their great potential as efficient functional layers for sensing devices and biomimetic nanoarchitectures.

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“…Metal nanowires have become essential building blocks for the development of advanced, miniaturized non-enzymatic electrochemical sensors (Shaidarova and Budnikov, 2011 ; Chen et al, 2013 , 2014 ; Koposova et al, 2013 , 2015 ; Suib, 2013 ; Chen and Ostrom, 2015 ; Muratova et al, 2016 ). The improved electrocatalytic properties of the sensor metal nanomaterials in comparison with bulk materials are related to their high surface areas and energy, the preferential orientation of crystallographic planes, lattice defects at the surfaces, and the presence of pores, sharp edges, and nanoscale junctions.…”

Section: Introductionmentioning

confidence: 99%

Multisensor Systems by Electrochemical Nanowire Assembly for the Analysis of Aqueous Solutions

et al. 2018

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The development of electrochemical multisensor systems is driven by the need for fast, miniature, inexpensive, analytical devices, and advanced interdisciplinary based on both chemometric and (nano)material approaches. A multicomponent analysis of complex mixtures in environmental and technological monitoring, biological samples, and cell culture requires chip-based multisensor systems with high-stability sensors. In this paper, we describe the development, characterization, and applications of chip-based nanoelectrochemical sensor arrays prepared by the directed electrochemical nanowire assembly (DENA) of noble metals and metal alloys to analyze aqueous solutions. A synergic action of the electrode transducer function and electrocatalytic activity of the nanostructured surface toward analytes is achieved in the assembled metal nanowire (NW) sensors. Various sensor nanomaterials (Pd, Ni, Au, and their multicomponent compositions) can be electrochemically assembled on a single chip without employing multiple cycles of photolithography process to realize multi-analyte sensing applications as well as spatial resolution of sensor analysis by this single-chip multisensor system. For multi-analyte electrochemical sensing, individual amperometric signals of two or more nanowires can be acquired, making use of the specific electrocatalytic surface properties of the individual nanowire sensors of the array toward analytes. To demonstrate the application of a new electrochemical multisensor platform, Pd-Au, Pd-Ni, Pd, and Au NW electrode arrays on a single chip were employed for the non-enzymatic analysis of hydrogen peroxide, glucose, and ethanol. The analytes are determined at low absolute values of the detection potentials with linear concentration ranges of 1.0 × 10−6 − 1.0 × 10−3 M (H2O2), 1.5 × 10−7 − 2.0 × 10−3 M (glucose), and 0.7 × 10−3 − 3.0 × 10−2 M (ethanol), detection limits of 2 × 10−7 M (H2O2), 4 × 10−8 M (glucose), and 5.2 × 10−4 M (ethanol), and sensitivities of 18 μA M−1 (H2O2), 178 μA M−1 (glucose), and 28 μA M−1 (ethanol), respectively. The sensors demonstrate a high level of stability due to the non-enzymatic detection mode. Based on the DENA-assembled nanowire electrodes of a compositional diversity, we propose a novel single-chip electrochemical multisensor platform, which is promising for acquiring complex analytical signals for advanced data processing with chemometric techniques aimed at the development of electronic tongue-type multisensor systems for flexible multi-analyte monitoring and healthcare applications.

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Chemiresistors based on ultrathin gold nanowires for sensing halides, pyridine and dopamine

Cited by 29 publications

References 66 publications

Electrical resistivity of nanoporous gold modified with thiol self-assembled monolayers

Electrical resistivity of nanoporous gold modified with thiol self-assembled monolayers

Photoresponsive Porphyrin Nanotubes of Meso-tetra(4-Sulfonatophenyl)Porphyrin and Sn(IV) meso-tetra(4-pyridyl)porphyrin

Multisensor Systems by Electrochemical Nanowire Assembly for the Analysis of Aqueous Solutions

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