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Zheng Y, Li Y, Fan L, Yao H, Zhang Z. An amphiprotic paper-based electrode for glucose detection based on layered carbon nanotubes with silver and polystyrene particles. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:1268-1278. [PMID: 35274112 DOI: 10.1039/d1ay01950c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In this work, a flexible amphiprotic amino-bonded carbon nanotube-Ag nanoparticle/polystyrene (CNT-NH2-Ag/PS) paper electrode was fabricated to measure glucose in human body fluids by a combination of vacuum filtration and high temperature baking. The front side of the fabricated paper electrode was hydrophobic and conductive, whereas its back side was hydrophilic and nonconductive. In the fabrication process, the coating sequence of CNT-NH2, Ag and PS was critical to determine the performance of the resulting CNT-NH2-Ag/PS electrode besides other parameters (e.g., amount of soluble starch, PS and Ag nanoparticles, type and amount of CNT-NH2, and electrode sensing area). Based on a series of experimental observations, the possible mechanism of glucose detection on the paper electrode was proposed, in which glucose was more favorable to migrate to the hydrophilic back side of the paper and interact with the active species (e.g., O2-) on the electrode surface. The electrochemical results showed that the CNT-NH2-Ag/PS paper electrode maintained stable electrochemical properties even after five cycles of use and 60 days of storage in air. The amphiprotic paper electrode demonstrated excellent sensing performance for glucose with a linear range of 1 μM to 1000 μM, a low detection limit of 0.2 μM, and a sensitivity of 31 333.0 μA mM-1 cm-2. The fabricated paper electrode was also successfully applied to detect different levels of glucose in complex human body fluids such as saliva, urine, and serum. These features make this type of paper electrode promising for glucose measurement.
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Affiliation(s)
- Yajun Zheng
- School of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, China.
| | - Yu Li
- School of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, China.
| | - Libin Fan
- School of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, China.
| | - Hedan Yao
- School of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, China.
| | - Zhiping Zhang
- School of Chemistry and Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, China.
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Varga E, Pusztai P, Oszkó A, Baán K, Erdőhelyi A, Kónya Z, Kiss J. Stability and Temperature-Induced Agglomeration of Rh Nanoparticles Supported by CeO2. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:2761-70. [PMID: 26914641 DOI: 10.1021/acs.langmuir.5b04482] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Erika Varga
- Department of Physical Chemistry and Materials Science, ‡Department of Applied
and Environmental Chemistry, and §MTA-SZTE Reaction Kinetics and Surface Chemistry
Research Group, University of Szeged, H-6720 Szeged, Hungary
| | - Péter Pusztai
- Department of Physical Chemistry and Materials Science, ‡Department of Applied
and Environmental Chemistry, and §MTA-SZTE Reaction Kinetics and Surface Chemistry
Research Group, University of Szeged, H-6720 Szeged, Hungary
| | - Albert Oszkó
- Department of Physical Chemistry and Materials Science, ‡Department of Applied
and Environmental Chemistry, and §MTA-SZTE Reaction Kinetics and Surface Chemistry
Research Group, University of Szeged, H-6720 Szeged, Hungary
| | - Kornélia Baán
- Department of Physical Chemistry and Materials Science, ‡Department of Applied
and Environmental Chemistry, and §MTA-SZTE Reaction Kinetics and Surface Chemistry
Research Group, University of Szeged, H-6720 Szeged, Hungary
| | - András Erdőhelyi
- Department of Physical Chemistry and Materials Science, ‡Department of Applied
and Environmental Chemistry, and §MTA-SZTE Reaction Kinetics and Surface Chemistry
Research Group, University of Szeged, H-6720 Szeged, Hungary
| | - Zoltán Kónya
- Department of Physical Chemistry and Materials Science, ‡Department of Applied
and Environmental Chemistry, and §MTA-SZTE Reaction Kinetics and Surface Chemistry
Research Group, University of Szeged, H-6720 Szeged, Hungary
| | - János Kiss
- Department of Physical Chemistry and Materials Science, ‡Department of Applied
and Environmental Chemistry, and §MTA-SZTE Reaction Kinetics and Surface Chemistry
Research Group, University of Szeged, H-6720 Szeged, Hungary
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Takakusagi S, Chun WJ, Uehara H, Asakura K, Iwasawa Y. Polarization-Dependent Total-Reflection Fluorescence X-ray Absorption Fine Structure for 3D Structural Determination and Surface Fine Tuning. Top Catal 2013. [DOI: 10.1007/s11244-013-0134-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Theoretical Modelling of Oxide-Supported Metal Nanoclusters and Nanoalloys. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/b978-0-08-096357-0.00003-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Zhang X, Xu R, Wang LJ, Hong F. Alkali metal atom adsorption on-top of the F s 0 defective center of MgO(001) surface. ACTA ACUST UNITED AC 2011. [DOI: 10.1007/s11741-011-0725-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Silver and gold nanoparticles in silica matrices: synthesis, properties, and application. THEOR EXP CHEM+ 2010. [DOI: 10.1007/s11237-010-9122-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Farmer JA, Campbell CT, Xu L, Henkelman G. Defect Sites and Their Distributions on MgO(100) by Li and Ca Adsorption Calorimetry. J Am Chem Soc 2009; 131:3098-103. [DOI: 10.1021/ja808986b] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jason A. Farmer
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, and Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712-0165
| | - Charles T. Campbell
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, and Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712-0165
| | - Lijun Xu
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, and Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712-0165
| | - Graeme Henkelman
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, and Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712-0165
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Zhang H, Fu Q, Yao Y, Zhang Z, Ma T, Tan D, Bao X. Size-dependent surface reactions of Ag nanoparticles supported on highly oriented pyrolytic graphite. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:10874-10878. [PMID: 18729334 DOI: 10.1021/la801348n] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Various sizes of Ag particles were grown on highly oriented pyrolytic graphite (HOPG) surfaces, which had previously been modified with nanopits to act as anchoring sites. Surface reactions of O2, CHCl3, and CCl4 on the Ag particles and bulk Ag(111) surfaces were studied by X-ray photoelectron spectroscopy (XPS), and it has been shown that size dependence of O2 and CHCl3 reactions on Ag differs from that of CCl4. Weak reactions of O2 and CHCl3 were observed on the bulk Ag(111) surfaces, while strong reactions occur on Ag particles with medium Ag coverage, suggesting that the reactions are controlled by the number of surface defect sites. On the contrary, the dissociation of CCl4 is mainly determined by the exposed Ag facet area, mainly Ag(111) facet, and strong dissociation reaction happens on the bulk Ag(111) surface. The results suggest that the size effects, which are often discussed in heterogeneous catalysis, are strongly dependent on the reaction mechanism.
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Affiliation(s)
- Hui Zhang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, People's Republic of China
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Chen MS, Goodman DW. Ultrathin, ordered oxide films on metal surfaces. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2008; 20:264013. [PMID: 21694347 DOI: 10.1088/0953-8984/20/26/264013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Metal oxides and oxide thin films are extensively used as active catalysts and catalytic supports, as well as in many other important technical applications. Unlike TiO(2), which is a semiconductor and can be investigated using a variety of surface science techniques, most metal oxides are insulators, which seriously restricts their use as model surfaces with modern surface science techniques. This difficulty can be circumvented by synthesizing ultrathin oxide films a few nanometers in thickness with well-defined structures, that mimic the corresponding bulk oxides yet are thin enough to be sufficiently conducting. In this review, preparations, structures, electronic and chemical properties of four representative oxides, alumina, magnesium oxide, silica, and titania, are addressed. Of these MgO is found to grow in a layer-by-layer fashion, allowing preparation of crystalline thin film structures with varying thicknesses. Crystalline TiO(2) and Ti(2)O(3) can also be synthesized, whereas SiO(2) and Al(2)O(3), although amenable to synthesis as well-defined monolayer structures, have only been grown to date as amorphous multilayers.
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Affiliation(s)
- M S Chen
- Department of Chemistry, Texas A&M University, PO Box 30012, College Station, TX 77842-3012, USA. State Key Laboratory of Physical Chemistry for Solid Surface, Department of Chemistry, Xiamen University, Xiamen 361005, Fujian, People's Republic of China
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Barcaro G, Aprà E, Fortunelli A. Structure of Ag Clusters Grown on Fs-Defect Sites of an MgO(1 0 0) Surface. Chemistry 2007; 13:6408-18. [PMID: 17497620 DOI: 10.1002/chem.200601796] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The structure of AgN clusters (N=1-4, 6, 8, 10), both in the gas phase and grown on the MgO(1 0 0) surface containing Fs-defects, has been investigated by a density functional basin-hopping (DF-BH) approach. In analogy with what observed in the case of gold clusters, it is found that the presence of the defect implies a double frustration and a cylindrical invariance of the metal-surface interaction, causing small Ag clusters growing around the Fs defect to be highly fluxional. Nevertheless, two different structural crossovers are found to be induced by the metal-defect interaction for the adsorbed clusters such that: 1) planar structures prevail for N<or=4 (as in the gas phase); 2) noncrystalline (fivefold symmetric) structures, which are the lowest energy ones in the gas phase for medium sized AgN clusters (N>or=7), prevail for N=6 and N=8; 3) distorted face-centered cubic (fcc) structures grown pseudomorphically on the defected surface prevail for N=10. The transition from fivefold to fcc motifs is rationalized in terms of the double-frustration effect, which increases the bond strain of the noncrystalline structures. Detrapping energies from the defect were also calculated; the lowest energy pathway corresponds to the detachment of a dimer.
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Affiliation(s)
- Giovanni Barcaro
- Molecular Modeling Laboratory, IPCF-CNR, Via G. Moruzzi 1, Pisa, 56124, Italy
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Abstract
Theoretical studies of CO adsorption on a two-layer Ag(100) film and on a two-layer Ag film on a MgO(100) support are reported. Ab initio calculations are carried at the configuration interaction level of theory using embedding methods to treat the metal-adsorbate region and the extended ionic solid. The metal overlayer is considered in two different structures: where Ag-Ag distances are equal to the value in the bulk solid, and for a slightly expanded lattice in which the Ag-Ag distances are equal to the O-O distance on the MgO(100) surface. The calculated adsorption energy of Ag(100) on MgO(100) is 0.58 eV per Ag interfacial atom; the Ag-O distance is 2.28 A. A small transfer of electrons from MgO to Ag occurs on deposition of the silver overlayer. CO adsorption at an atop Ag site is found to be the most stable for adsorption on the two-layer Ag film and also for adsorption on Ag deposited on the oxide; CO adsorption energies range from 0.12 to 0.19 eV. The CO adsorption energy is reduced for the Ag/MgO system compared to adsorption on the unsupported metal film thereby providing evidence for a direct electronic effect of the oxide support at the metal overlayer surface. Expansion of the Ag-Ag distance in the two-layer system also reduces the adsorption energy.
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Affiliation(s)
- Changyong Qin
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, USA
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Formation of Pd dimers at regular and defect sites of the MgO(100) surface: cluster model calculations. Chem Phys 2005. [DOI: 10.1016/j.chemphys.2004.02.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Brazzelli S, Di Valentin C, Pacchioni G, Giamello E, Chiesa M. Alkali Metal Doping of MgO: Mechanisms of Formation of Paramagnetic Surface Centers. J Phys Chem B 2003. [DOI: 10.1021/jp0341321] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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