Publications

2014
Liu L, Layani M, Yellinek S, Kamyshny A, Ling H, Lee PS, Magdassi S, Mandler D. ``Nano to nano'' electrodeposition of WO3 crystalline nanoparticles for electrochromic coatings. JOURNAL OF MATERIALS CHEMISTRY A. 2014;2 (38) :16224-16229.
Kraus-Ophir S, Witt J, Wittstock G, Mandler D. Nanoparticle-Imprinted Polymers for Size-Selective Recognition of Nanoparticles. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION. 2014;53 (1) :294-298.
Layani M, Darmawan P, Foo WL, Liu L, Kamyshny A, Mandler D, Magdassi S, Lee PS. Nanostructured electrochromic films by inkjet printing on large area and flexible transparent silver electrodes. NANOSCALE. 2014;6 (9) :4572-4576.
Tulchinsky D, Uvarov V, Popov I, Mandler D, Magdassi S. A novel non-selective coating material for solar thermal potential application formed by reaction between sol-gel titania and copper manganese spinel. SOLAR ENERGY MATERIALS AND SOLAR CELLS. 2014;120 (A, SI) :23-29.
Ling H, Lu J, Phua S, Liu H, Liu L, Huang Y, Mandler D, Lee PS, Lu X. One-pot sequential electrochemical deposition of multilayer poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonic acid)/tungsten trioxide hybrid films and their enhanced electrochromic properties. JOURNAL OF MATERIALS CHEMISTRY A. 2014;2 (8) :2708-2717.
Liu L, Mandler D. Patterning carbon nanotubes with silane by scanning electrochemical microscopy. ELECTROCHEMISTRY COMMUNICATIONS. 2014;48 :56-60.
Kraus-Ophir S, Ben-Shahar Y, Banin U, Mandler D. Perpendicular Orientation of Anisotropic Au-Tipped CdS Nanorods at the Air/Water Interface. ADVANCED MATERIALS INTERFACES. 2014;1 (1).
Metoki N, Liu L, Beilis E, Eliaz N, Mandler D. Preparation and Characterization of Alkylphosphonic Acid Self-Assembled Mono layers on Titanium Alloy by Chemisorption and Electrochemical Deposition. LANGMUIR. 2014;30 (23) :6791-6799.
Noyhouzer T, Mandler D. Remote Sensing. In: Moretto LM, Kalcher K ENVIRONMENTAL ANALYSIS BY ELECTROCHEMICAL SENSORS AND BIOSENSORS: FUNDAMENTALS, VOL 1. ; 2014. pp. 667-690.
Wang Z, Zhang J, Zhu C, Wu S, Mandler D, Marks RS, Zhang H. Amplified detection of femtomolar DNA based on a one-to-few recognition reaction between DNA-Au conjugate and target DNA. NanoscaleNanoscale. 2014;6 (6) :3110 - 5.Abstract
A sensitive electrochemical DNA biosensor based on the amplification of Au nanoparticles (AuNPs) has been developed. The AuNPs were modified with two types of signaling reporter DNAs, i.e. a methylene blue probe (MB-probe 2-SH) and T10 with a methylene blue signaling molecule (MB-T10-SH), forming DNA-AuNP conjugates. The MB-probe 2-SH is complementary to the target DNA, while MB-T10-SH is not. The presence of MB-T10-SH reduces the cross-reaction between target DNA and MB-probe 2-SH on the AuNPs, resulting in increased sensitivity of the biosensor. In our assay, the DNA sensor is fabricated by immobilizing a capture probe on the surface of the Au electrode, which then hybridizes with the corresponding target DNA, and further hybridizes with a DNA-Au conjugate. The signal of MB is measured by differential pulse voltammetry, while the DNA-Au conjugate enables the detection of target DNA in the linear range of 10(-13) to 10(-8) M with the detection limit as low as 50 fM.[on SciFinder (R)]
Liu L, Tan C, Chai J, Wu S, Radko A, Zhang H, Mandler D. Electrochemically "writing" graphene from graphene oxide. SmallSmall (Weinheim an der Bergstrasse, Germany). 2014;10 (17) :3555 - 9.Abstract
A novel approach of patterning graphene on conductive surfaces based on local electrochemical reduction of graphene oxide is reported. Graphene is "written" from typical graphene oxide dispersion by applying negative potential on conductive surfaces vs. a micrometer-sized counter electrode "pen" with scanning electrochemical microscopy (SECM). Micrometer scaled patterns are successfully generated on gold and stainless steel surfaces.[on SciFinder (R)]
Hitrik M, Lev O, Mandler D. In situ electrodeposition of an asymmetric sol-gel membrane based on an octadecyltrimethoxysilane Langmuir film. ChemistryChemistry (Weinheim an der Bergstrasse, Germany). 2014;20 (38) :12104 - 13.Abstract
The unique properties of Langmuir film formation were utilized in assembling a thin skin of an asymmetric membrane. An octadecyltrimethoxysilane (ODTMS) Langmuir monolayer was formed at the air-water interface and served as the substrate for growing a bulky sol-gel polymer in situ. The latter was based on the electrochemical deposition of tetramethoxysilane dissolved in the water subphase by means of horizontal touch electrochemistry. The resultant asymmetric layer that consisted of a thin hydrophobic ODTMS Langmuir film connected to a bulk hydrophilic sol-gel network was studied in situ and ex situ by using various techniques, such as cyclic voltammetry, electrochemical impedance spectroscopy (EIS), scanning electron microscopy, transmission electron microscopy (TEM), and goniometry. We found that a porous hydrophilic film grew on top of a hydrophobic layer as was evident from TEM, contact angle, and EIS analyses. The film thickness and film permeability could be controlled by changing the deposition conditions such as the potential window applied and its duration. Hence, this method offers an alternative approach for assembling asymmetric films for various applications.[on SciFinder (R)]
Kraus-Ophir S, Witt J, Wittstock G, Mandler D. Nanoparticle-imprinted polymers for size-selective recognition of nanoparticles. Angew Chem Int Ed EnglAngewandte Chemie (International ed. in English). 2014;53 (1) :294 - 8.Abstract
Citrate-stabilized gold nanoparticles 15 nm and 33 nm in diameter were transferred concomitantly with a monolayer of positively charged polyaniline by Langmuir-Blodgett transfer at pH 5 onto a conducting indium-doped tin oxide (ITO) support. Films consisting of one to three layers of polyaniline with thicknesses of 1-3 nm were prepared and characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy. After electro-oxidation of the Au nanoparticles in 0.1 M KCl, cavities were left behind in the film that could be analyzed by SEM. These cavities were able to recapture analyte nanoparticles from a solution of pH 10 and showed size-exclusion properties. The amount of nanoparticles taken up by the cavities was conveniently analyzed by measuring the charge associated with the electro-oxidation of these particles in 0.1 M KCl after the film had been rinsed with water. The size-exclusion properties improved with the number of Langmuir-Blodgett layers transferred.[on SciFinder (R)]
Layani M, Darmawan P, Foo WL, Liu L, Kamyshny A, Mandler D, Magdassi S, Lee PS. Nanostructured electrochromic films by inkjet printing on large area and flexible transparent silver electrodes. NanoscaleNanoscale. 2014;6 (9) :4572 - 6.Abstract
Printed electrochromic flexible films were obtained by combining transparent silver grid electrodes formed by self-assembly and inkjet printed WO3 nanoparticles. Concentrated dispersions of WO3 nanoparticles were inkjet printed on transparent plastic silver grid electrodes with a high transparency of 83% in the spectral range of 400-800 nm, and a low sheet resistance in the range of 1-5 Ω sq(-1). These electrodes were used for electrochromic applications for the first time. The resultant patterned nanostructured electrochromic films maintained their coloring and bleaching performance after bending of the flexible films.[on SciFinder (R)]
Metoki N, Liu L, Beilis E, Eliaz N, Mandler D. Preparation and characterization of alkylphosphonic acid self-assembled monolayers on titanium alloy by chemisorption and electrochemical deposition. LangmuirLangmuir : the ACS journal of surfaces and colloids. 2014;30 (23) :6791 - 9.Abstract
Ti-6Al-4V alloy is the most commonly used alloy for dental and orthopedic implants. In order to improve osseointegration, different surface modification methods are usually employed, including self-assembled monolayers (SAMs). This study presents an investigation of both active (electroassisted) and passive (adsorption) approaches for the modification of Ti-6Al-4V using alkylphosphonic acid. The monolayers were characterized by cyclic voltammetry, double-layer capacitance, contact angle measurements, X-ray photoelectron spectroscopy, polarization modulation infrared reflection adsorption spectroscopy, electrochemical impedance spectroscopy, and corrosion potentiodynamic polarization measurements. It is shown that the electrochemically assisted monolayers, which are assembled faster, exhibit better control over surface properties, a superior degree of order, and a somewhat higher packing density. The electrosorbed SAMs also exhibit better blockage of electron transfer across the interface and thus have better corrosion resistance.[on SciFinder (R)]
Wang Z, Zhang J, Zhu C, Wu S, Mandler D, Marks RS, Zhang H. Amplified detection of femtomolar DNA based on a one-to-few recognition reaction between DNA-Au conjugate and target DNA. NanoscaleNanoscale. 2014;6 (6) :3110 - 3115.Abstract
A sensitive electrochem. DNA biosensor based on the amplification of Au nanoparticles (AuNPs) has been developed. The AuNPs were modified with two types of signaling reporter DNAs, i.e. a methylene blue probe (MB-probe 2-SH) and T10 with a methylene blue signaling mol. (MB-T10-SH), forming DNA-AuNP conjugates. The MB-probe 2-SH is complementary to the target DNA, while MB-T10-SH is not. The presence of MB-T10-SH reduces the cross-reaction between target DNA and MB-probe 2-SH on the AuNPs, resulting in increased sensitivity of the biosensor. In our assay, the DNA sensor is fabricated by immobilizing a capture probe on the surface of the Au electrode, which then hybridizes with the corresponding target DNA, and further hybridizes with a DNA-Au conjugate. The signal of MB is measured by differential pulse voltammetry, while the DNA-Au conjugate enables the detection of target DNA in the linear range of 10-13 to 10-8 M with the detection limit as low as 50 fM. [on SciFinder(R)]
Liu L, Tan C, Chai J, Wu S, Radko A, Zhang H, Mandler D. Electrochemically "writing" graphene from graphene oxide. SmallSmall. 2014;10 (17) :3555 - 3559.Abstract
Graphene has been successfully patterned on stainless steel and gold at micrometer-scale resoln. The concept is based on the electrochem. redn. of graphene oxide on conductive surfaces localized by a microelectrode that is positioned close to the surface. [on SciFinder(R)]
Kraus-Ophir S, Witt J, Wittstock G, Mandler D. Nanoparticle-Imprinted Polymers for Size-Selective Recognition of Nanoparticles. Angew. Chem., Int. Ed.Angewandte Chemie, International Edition. 2014;53 (1) :294 - 298.Abstract
Citrate-stabilized gold nanoparticles 15 nm and 33 nm in diam. were transferred concomitantly with a monolayer of pos. charged polyaniline by Langmuir-Blodgett transfer at pH 5 onto a conducting indium-doped tin oxide (ITO) support. Films consisting of one to three layers of polyaniline with thicknesses of 1-3 nm were prepd. and characterized by SEM, at. force microscopy (AFM), and XPS. After electrooxidn. of the Au nanoparticles in 0.1 M KCl, cavities were left behind in the film that could be analyzed by SEM. These cavities were able to recapture analyte nanoparticles from a soln. of pH 10 and showed size-exclusion properties. The amt. of nanoparticles taken up by the cavities was conveniently analyzed by measuring the charge assocd. with the electrooxidn. of these particles in 0.1 M KCl after the film had been rinsed with water. The size-exclusion properties improved with the no. of Langmuir-Blodgett layers transferred. [on SciFinder(R)]
Tulchinsky D, Uvarov V, Popov I, Mandler D, Magdassi S. A novel non-selective coating material for solar thermal potential application formed by reaction between sol-gel titania and copper manganese spinel. Sol. Energy Mater. Sol. CellsSolar Energy Materials & Solar Cells. 2014;120 (PA) :23 - 29.Abstract
A method for prepg. a novel bixbyite non-selective coating for solar thermal conversion is described. The coating is formed by a thermal reaction between a titania sol-gel precursor with a copper manganese spinel to form a new material, Cu0.44Ti0.44Mn0.84Fe0.28O3, with a bixbyite structure. The effect of temp. and ratio between the two components on the formation of the bixbyite layer (deposited on Inconel by spray-coating) was studied. The absorptance of the films (AM 1.5; 335-2500 nm) with a thickness of 10±2 μm after annealing at 2 h at 650 °C and 750 °C was 97.4% and 94.7%, resp. This synthesis represents a novel approach in which the final solar thermal coating is formed as a continuous and uniform layer which combines both the absorber and the ceramic binder. The developed material shows promising results for future applications as absorber in solar thermal energy conversion. [on SciFinder(R)]
Ling H, Lu J, Phua S, Liu H, Liu L, Huang Y, Mandler D, Lee PS, Lu X. One-pot sequential electrochemical deposition of multilayer poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonic acid)/tungsten trioxide hybrid films and their enhanced electrochromic properties. J. Mater. Chem. AJournal of Materials Chemistry A: Materials for Energy and Sustainability. 2014;2 (8) :2708 - 2717.Abstract
Hybrid thin films composed of multilayer poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonic acid) (PEDOT:PSS) and W trioxide (WO3) were electrochem. deposited on In Sn oxide (ITO) from a 1-pot soln. using a square-wave galvanostatic method. The morphol. of the hybrid thin films could be easily manipulated to optimize their electrochromic properties by adjusting deposition conditions. In the hybrids, both components can be simultaneously switched to colored or bleached states. The hybrid film obtained with very short deposition times of PEDOT:PSS and WO3 in each cycle exhibits significantly enhanced electrochromic properties. The optical contrast of the hybrid film is higher than that of PEDOT:PSS or WO3 films of the same thickness. Also, the stability of the hybrid film is also drastically enhanced. The enhancement may be attributed to the favorable interactions between the two components, i.e., PEDOT:PSS may enter the defect sites in electrodeposited WO3, preventing surface-defect-induced anodic dissoln. during cycling, while the surface functional groups of WO3 may act as dopants to inhibit over-oxidn. of PEDOT, as well as the large interfacial area created using this unique 1-pot multilayer deposition method. [on SciFinder(R)]

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