This paper presents a method to distinguish graphene from graphite in powdered samples by analysing the Raman 2D band symmetry.

Boron-doped diamond is a promising transducer material for numerous devices which are designed contact with electrolytes. For optimized electron transfer the surface of needs to be hydrogen terminated. Up now H-termination done by plasma chemical vapor deposition techniques. In this paper, we show that boron-doped can H-terminated electrochemically applying negative voltages in acidic solutions. Electrochemical generates clean virtually no carbon–oxygen bonds (x-ray photoelectron...

In this report, the fabrication of all-nanocrystalline diamond (NCD) nanoelectrode arrays (NEAs) by e-beam lithography as well all-diamond ensembles (NEEs) using nanosphere is presented. way, nanostructuring techniques are combined with excellent properties that desirable for electrochemical sensor devices. Arrays and recessed disk electrodes radii ranging from 150 to 250 nm a spacing 10 μm have been fabricated. Electrochemical impedance spectroscopy cyclic voltammetry was conducted...

Monosized (∼4 nm) diamond nanoparticles arranged on substrate surfaces are exciting candidates for single-photon sources and nucleation sites ultrathin nanocrystalline film growth. The most commonly used technique to obtain substrate-supported is electrostatic self-assembly seeding using nanodiamond colloidal suspensions. Currently, monodisperse colloids, which have a narrow distribution of particle sizes centering the core size nm), available different materials such as Si, SiO2, Cu, AlN....

In atomic force microscopy (AFM), sharp and wear-resistant tips are a critical issue. Regarding scanning electrochemical (SECM), electrodes required to be mechanically chemically stable. Diamond is the perfect candidate for both AFM probes as well electrode materials if doped, due diamond's unrivaled mechanical, chemical, properties. this study, standard were overgrown with typically 300 nm thick nanocrystalline diamond (NCD) layers modified obtain ultra nanowire-based that used combined...

The application of surface acoustic wave (SAW) resonators as sensor elements for different physical parameters such temperature, pressure, and force has been well-known several years. energy storage in the SAW direct conversion from parameter to a wave, frequency or phase, enables construction passive that can be interrogated wireless. This paper presents temperature-measurement system based on wireless sensors. principle sensors interrogation is discussed briefly. A new measurement device...

Integrated all-diamond ultramicroelectrode arrays (UMEAs) were fabricated using standard photolithography processes. The array consisted of typically 45 ultramicroelectrodes with a diameter 10 μm and center-to-center spacing 60 μm. quasi-reference counter electrodes made from conductive diamond integrated on 5 × mm(2) chip. On the UMEA, high ratio faradaic current to capacitive was achieved heavily boron-doped hydrogen-terminated surfaces at slow scan rates in concentration supporting...

The crystalline form of sp(3)-hybridized carbon, diamond, offers various electrolyte-stable surface terminations. H-termination-selective attachment nitrophenyl diazonium, imaged by AFM, shows that electrochemical oxidation can control the fractional hydrogen/oxygen termination diamond on nanometer scale. This is particular interest for all applications relying interfacial electrochemistry, especially biointerfaces.

Abstract Silicon carbide (SiC) films have been used frequently for high‐frequency and powder devices but seldom applied as the electrode material. In this paper, we investigated electrochemical properties of nanocrystalline 3C‐SiC film in detail. A with grain sizes 5 to 20 nm shows a surface roughness about 30 nm. The resistivity is range 3.5–6.2 kΩ cm. 0.1 M H 2 SO 4 solution, has double‐layer capacitance 30–35 μF cm −2 potential window 3.0 V if an absolute current density mA defined...

We demonstrate a highly efficient, single-step, cathodic exfoliation process of graphite to produce single- few-layer graphene with yield over 70% from natural flakes. By employing boron-doped diamond electrodes high potentials up -60 V can be applied which was found greatly increase the yield. The produced flakes are partially hydrogenated during electrochemical treatment likely aiding in their exfoliation. resulting have large lateral size 50 μm diameter. Due reversibility hydrogenation by...

Abstract Nanocrystalline diamond nanoelectrode arrays (NEAs) have been applied to investigate surface‐sensitive adsorption phenomena at the diamond–liquid interface. The of neutral methyl viologen (MV 0 ) was used as a model system. MV examined on hydrogen‐ and oxygen‐terminated surfaces. On hydrogenated surface, sharp anodic stripping peak observed upon oxidation , revealing strong . In contrast, sigmoidal voltammogram recorded with an oxygenated electrode indicating there no adsorption....

Mechanical and electrical losses induced by an electrode material greatly influence the performance of bulk acoustic wave (BAW) resonators. Graphene as a conducting virtually massless 2D is suitable candidate alternative for BAW resonators which reduces mechanical losses. In this publication we show that graphene acts active top solidly mounted (BAW-SMR) at 2.1 GHz resonance frequency. Due to strong decrease mass loading its remarkable electronic properties, demonstrates ability ultrathin...

This paper discusses SAW resonators. The device consists of a piezoelectric substrate with metalization. It is shown that the sytems langasite-Pt and gallium orthophosphate-Pt are able to fulfill demands for high temperature operation. An AFM scan metalization also available.

Abstract The adsorption and conformational state of the electron transfer protein cytochrome c (cyt c) on flat, boron doped polycrystalline diamond electrodes was investigated using electrochemical techniques atomic force microscopy (AFM). An reduction wave from adsorbed identified as oxygen reduction, which is catalysed by deformed heme redox centre cyt c. We show that this catalytic activity only occurs after partial denaturation Therefore peak used for characterization AFM...

Abstract All‐diamond ultra‐microelectrode arrays (UMEAs) were fabricated using standard photolithography processes. The array consists of typically 45 ultra‐microelectrodes with a diameter 10 µm and center‐to‐center spacing 60 µm. quasi‐reference counter electrodes are made from conductive diamond integrated on 5 × mm 2 chip. different surface terminations characterized cyclic voltammetry the redox couple ${\rm Fe(CN)}_{{\rm 6}}^{{{{\rm 3}{-} } \mathord{\left/ {\vphantom {{{\rm {4{-} }}}...

The two-dimensional and virtually massless character of graphene attracts great interest for radio frequency devices, such as surface bulk acoustic wave resonators. Due to its good electric conductivity, might be an alternative a electrode by improving resonator performance regarding mass-loading effects. We report on optimization the commonly used wet transfer technique large-area graphene, grown via chemical vapor deposition, onto aluminum nitride (AlN), which is mainly active,...

The usage of SAW resonators as remote sensors is well known. Double resonator for reducing disturbing influences from the radio channel separation sensor element device into matching network are already presented in M. Binhack et al. (2000). Here change difference frequency signal. Corrected was used to integrate function stated S. Klett (2002), e.g. a capacitive sensor. For passive wireless it very important optimize sensitivity and resolution while keeping energy conditions sufficient be...

Abstract A nanotextured diamond electrode was utilized to achieve optimized electrochemical redox‐interactions of cytochrome c (cyt ) with the transducer. The surface realized using a top–down technology where nanoparticles are used as etching masks. Macroscopic characterizations OH‐terminated cyclic voltammetry reveal adsorption‐controlled cyt /electrode interaction. adsorption is assigned electrostatic attraction force positively charged parts slightly negatively in pH 7 buffer. Atomic...

Abstract not Available.