Publications

2013
Raveh M, Liu L, Mandler D. Electrochemical co-deposition of conductive polymer-silica hybrid thin films. PHYSICAL CHEMISTRY CHEMICAL PHYSICS. 2013;15 (26) :10876-10884.
Noyhouzer T, Valdinger I, Mandler D. Enhanced Potentiometry by Metallic Nanoparticles. ANALYTICAL CHEMISTRY. 2013;85 (17) :8347-8353.
Ning W, Yizhong H, S.Magdassi, Mandler D, Hai L, Yi L. Formation of VO2 zero-dimensional/nanoporous layers with large supercooling effects and enhanced thermochromic properties. RSC ADVANCES. 2013;3 (19) :7124-7128.
Lu Y, Liu L, Mandler D, Lee PS. High switching speed and coloration efficiency of titanium-doped vanadium oxide thin film electrochromic devices. JOURNAL OF MATERIALS CHEMISTRY C. 2013;1 (44) :7380-7386.
Fedorov RG, Mandler D. Local deposition of anisotropic nanoparticles using scanning electrochemical microscopy (SECM). PHYSICAL CHEMISTRY CHEMICAL PHYSICS. 2013;15 (8) :2725-2732.
Noyhouzer T, Mandler D. A New Electrochemical Flow Cell for the Remote Sensing of Heavy Metals. ELECTROANALYSIS. 2013;25 (1, SI) :109-115.
Shenawi S, Jaber N, Almog J, Mandler D. A novel approach to fingerprint visualization on paper using nanotechnology: reversing the appearance by tailoring the gold nanoparticles' capping ligands. CHEMICAL COMMUNICATIONS. 2013;49 (35) :3688-3690.
Lu Y, Liu L, Foo WL, Magdassi S, Mandler D, Lee PS. Self-assembled polymer layers of linear polyethylenimine for enhancing electrochromic cycling stability. JOURNAL OF MATERIALS CHEMISTRY C. 2013;1 (23) :3651-3654.
Wang N, S.Magdassi, Mandler D, Long Y. Simple sol-gel process and one-step annealing of vanadium dioxide thin films: Synthesis and thermochromic properties. THIN SOLID FILMS. 2013;534 :594-598.
Mandler D. Special issue dedicated to Anna Brainina. JOURNAL OF SOLID STATE ELECTROCHEMISTRY. 2013;17 (6, SI) :1491-1492.
Shahar T, Tal N, Mandler D. The synthesis and characterization of thiol-based aryl diazonium modified glassy carbon electrode for the voltammetric determination of low levels of Hg(II). JOURNAL OF SOLID STATE ELECTROCHEMISTRY. 2013;17 (6, SI) :1543-1552.
Maimon E, Kribus A, Flitsanov Y, Shkolnik O, Feuermann D, Zwicker C, Larush L, Mandler D, Magdassi S. Wet-chemistry based selective coatings for concentrating solar power, in NONIMAGING OPTICS: EFFICIENT DESIGN FOR ILLUMINATION AND SOLAR CONCENTRATION X. Vol 8834. SPIE ; 2013.
Gdor E, Katz E, Mandler D. Biomolecular AND Logic Gate Based on Immobilized Enzymes with Precise Spatial Separation Controlled by Scanning Electrochemical Microscopy. JOURNAL OF PHYSICAL CHEMISTRY B. 2013;117 (50) :16058-16065.
Danieli T, Mandler D. Local surface patterning by chitosan-stabilized gold nanoparticles using the direct mode of scanning electrochemical microscopy (SECM). JOURNAL OF SOLID STATE ELECTROCHEMISTRY. 2013;17 (12, SI) :2989-2997.
Vadgama P, Mandler D. Characterization of thin films and membranes. Anal Bioanal ChemAnalytical and bioanalytical chemistry. 2013;405 (5) :1433 - 4.
Raveh M, Liu L, Mandler D. Electrochemical co-deposition of conductive polymer-silica hybrid thin films. Phys Chem Chem PhysPhysical chemistry chemical physics : PCCP. 2013;15 (26) :10876 - 84.Abstract
Conductive polymers, such as polypyrrole (ppy), have been the subject of numerous studies due to their promising applications in organic solar cells, flexible electronics, electrochromic devices, super capacitors, etc. Yet, their application is still limited as a result of poor processability. Silica has been reported to improve the mechanical strength and adhesion of conductive polymer films. In this work, we propose a controllable electrochemical approach for preparing ppy-silica hybrid thin films from a solution containing both pyrrole and silane monomers. It is known that pyrrole can be electropolymerised using anodic potentials, while silica can be electrodeposited under cathodic potentials. Thus, we studied the formation of ppy-silica hybrid thin films on a stainless steel surface by applying alternating potentials, i.e. cathodic followed by anodic pulses (denoted C + A) or anodic followed by cathodic pulses (denoted A + C). We show that by controlling the deposition potential and time for the cathodic and anodic pulses, the film thickness and composition can be manipulated well as analysed using profilometry and EDX. The element depth profile of the films was characterized using secondary ion mass spectroscopy (SIMS). In essence, for the C + A process, pyrrole diffuses through the cathodically electrodeposited wet silica gel layer and undergoes anodic polymerisation on the substrate, while for the A + C process, silane can be electrodeposited both on top of the anodically electrodeposited conductive ppy films as well as on the stainless steel through the pinholes in the ppy film. This offers a simple approach for tuning the structure of conductive polymer-sol-gel composite films.[on SciFinder (R)]
Fedorov RG, Mandler D. Local deposition of anisotropic nanoparticles using scanning electrochemical microscopy (SECM). Phys Chem Chem PhysPhysical chemistry chemical physics : PCCP. 2013;15 (8) :2725 - 32.Abstract
We demonstrate localized electrodeposition of anisotropic metal nanoobjects, namely Au nanorods (GNR), on indium tin oxide (ITO) using scanning electrochemical microscopy (SECM). A gold microelectrode was the source of the gold ions whereby double pulse chronoamperometry was employed to generate initially Au seeds which were further grown under controlled conditions. The distance between the microelectrode and the ITO surface as well as the different experimental parameters (electrodeposition regime, solution composition and temperature) were optimized to produce faceted gold seeds with the required characteristics (size and distribution). Colloidal chemical synthesis was successfully exploited for better understanding the role of the surfactant and different additives in breaking the crystallographic symmetry and anisotropic growth of GNR. Experiments performed in a conventional three-electrode cell revealed the most appropriate electrochemical conditions allowing high yield synthesis of nanorods with well-defined shape as well as nanocubes and bipyramids.[on SciFinder (R)]
Shenawi S, Jaber N, Almog J, Mandler D. A novel approach to fingerprint visualization on paper using nanotechnology: reversing the appearance by tailoring the gold nanoparticles' capping ligands. Chem Commun (Camb)Chemical communications (Cambridge, England). 2013;49 (35) :3688 - 90.Abstract
Gold nanoparticles, AuNPs, capped with mercaptocarboxylic acids followed by silver precipitation develop latent fingermarks on paper as high quality "negative" impressions. This effect stems from hydrogen bonding between the carboxylic group and the paper cellulose and may improve the yield of latent fingermarks since the results are less dependent on sweat composition.[on SciFinder (R)]
Gdor E, Katz E, Mandler D. Biomolecular AND logic gate based on immobilized enzymes with precise spatial separation controlled by scanning electrochemical microscopy. J Phys Chem BThe journal of physical chemistry. B. 2013;117 (50) :16058 - 65.Abstract
A surface-localized enzymatic AND gate based on scanning electrochemical microscopy was designed and studied. The gate is composed of an insulating glass surface modified with the enzyme glucose oxidase (GOx) and another surface opposing it made of a microelectrode. The latter was modified with a second enzyme, invertase (INV). The distance separating the modified microelectrode and surface controlled the output of the AND gate produced upon the biocatalytic reaction of the confined enzymes. Specifically, as the GOx-modified glass substrate entered the diffusion layer of the microelectrode, it catalyzed the regeneration of an electron-transfer mediator, ferroceniummethanol, generated electrochemically at the tip by oxidizing glucose, also generated at the tip, by catalytic cleaving of sucrose by INV. To enhance the activity of the GOx, mutarotase was added to convert α- to β-glucose to be further consumed by GOx. Hence, an increase of the current at the microelectrode was obtained by approaching the glass surface only in the presence of all the components. This is the first micrometer-sized biomolecular logic gate, of which we are aware, that is surface-confined and shows the promise held by the localization of biomolecular information-processing species.[on SciFinder (R)]
Noyhouzer T, Valdinger I, Mandler D. Enhanced potentiometry by metallic nanoparticles. Anal ChemAnalytical chemistry. 2013;85 (17) :8347 - 53.Abstract
Measuring the oxidation-reduction potential (Eh) requires an interface that is not selective toward specific species but exchanges electrons with all redox couples in the solution. Sluggish electron transfer (ET) kinetics with the species will not reflect the "true" Eh of the solution. Here, we present a novel approach by which adsorbed metal nanoparticles (NPs) are used for enhancing ET exchange rates between redox species and electrode surface and therefore affect significantly the measurement of the open circuit potential (OCP) and cyclic voltammetry (CV). The OCP and CV of various organic and inorganic species such as l-dopa, dopac, iron(II), and iodide are measured by bare stainless steel and by stainless steel modified by either Pt or Au NPs. We study the effect of the surface coverage of the stainless steel surface by NPs on the electrochemical response. Moreover, the stainless steel electrode was modified simultaneously by Au and Pt nanoparticles. This improved concurrently the stainless steel response (CV and potentiometry) toward two different species; l-dopa, which shows fast electron transfer on Pt, and catechol, which exhibits fast electron transfer on Au. We believe that this approach could be a first step toward developing a superior electrode for measuring the "true" Eh of complex aquatic systems.[on SciFinder (R)]

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