Effect of iodide ions on the hydrogen-terminated and partially oxygen-terminated diamond surface

Kanazawa, Hirofumi; Song, K. S.; Sakai, Takeyasu; Nakamura, Yusuke; Umezawa, Hamao; Tachiki, M.; Kawarada, Hiroshi

doi:10.1016/s0925-9635(03)00035-9

Cited by 35 publications

(29 citation statements)

References 5 publications

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“…GaN [54][55][56][57][58][59][60] InN [61] Diamond [62,63] Other electroanalytical applications Diamond [64][65][66][67][68][69][70][71][72][73][74] Bio-electrochemical applications Diamond [75][76][77] GaN [78][79][80] Electrocatalysis Diamond [81][82][83] Shear mode acoustic wave biosensors…”

Section: New Semiconductor Substratesmentioning

confidence: 99%

Novel semiconductor materials for the development of chemical sensors and biosensors: A review

Chaniotakis

Sofikiti

2008

Analytica Chimica Acta

131

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Section: New Semiconductor Substratesmentioning

confidence: 99%

Novel semiconductor materials for the development of chemical sensors and biosensors: A review

Chaniotakis

Sofikiti

2008

Analytica Chimica Acta

131

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“…An enzyme-modified diamondbased field-effect transistor (FET) has been realised for the detection of urea and glucose [6]. The pH-and ionsensitive properties of an electrolyte-gate FET with monocrystalline and polycrystalline diamond surfaces have been investigated in [7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Penicillin detection with nanocrystalline‐diamond field‐effect sensor

Abouzar

Poghossian

Razavi

et al. 2008

Physica Status Solidi (a)

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Nanocrystalline-diamond (NCD) films have been utilised for the detection of penicillin G for the first time. The developed penicillin-sensitive biosensor consists of a field-effect capacitive electrolyte-diamond-insulator-semiconductor (EDIS) structure with an immobilised enzyme layer that covers the gate region of the sensor. Undoped NCD thin films of about 100 nm thickness were grown on a p-Si-SiO 2 (50 nm thermally grown SiO 2 ) structure by microwave plasma-enhanced chemical vapour deposition. The enzyme penicillinase has been adsorptively immobilised directly onto the O-terminated NCD surface. The EDIS biosensors have been characterised in buffer solutions with different content of penicillin G by means of capacitance-voltage and constantcapacitance method. The developed penicillin biosensor possesses a low detection limit of 5 µM and a high sensitivity of 60-70 mV/decade in a wide linear range of 0.005-2.5 mM penicillin G concentration.

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“…[12][13][14] The application of diamond-based devices that take advantage of the unique surface properties of diamond, be it in air, in aqueous solution, or even in blood, necessitates stable surface conditions and interfacial properties in order to ensure the long lasting functionality of the device. Only the limited chemical stability under physiological conditions has hampered the implementation of silicon and other semiconductive materials into similar devices.…”

mentioning

confidence: 99%

Aging of Hydrogenated and Oxidized Diamond

Geisler

Hugel

2010

Advanced Materials

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Effective control of the surface properties of devices becomes more and more important to ensure their prolonged performance, as the size of devices diminishes to the nanoscale. At the nanoscale interfacial properties can differ from the macroscopic properties including conductivity, electron affinity, surface potential, and reactivity.[1] Here, we present a single-molecule sensor to detect molecular adsorption free energies in liquid under variable conditions. Utilizing atomic force microscopy (AFM), this approach provides nanoscale precision and excellent sensitivity to surface properties. This is demonstrated by the investigation of the aging of a diamond that was chemically modified to control its conductivity, surface potential, and wettability.Diamond exhibits extraordinary mechanical properties and is chemically inert as well as biocompatible. It is, therefore, suitable for biomedical applications [2,3] such as cell growth support [4,5] and as a refinement of medical indwelling devices. [6,7] In addition to the exceptional material characteristics, hydrogenated diamond exhibits p-type surface conductivity, whereas oxidized diamond is insulating.[8] These electronic properties have advanced the further development of diamond-based sensor devices, such as electrochemical sensors, [9] biosensors, [10,11] and ion-sensitive field effect transistors (ISFETs) in bioelectronics. [12][13][14] The application of diamond-based devices that take advantage of the unique surface properties of diamond, be it in air, in aqueous solution, or even in blood, necessitates stable surface conditions and interfacial properties in order to ensure the long lasting functionality of the device. Only the limited chemical stability under physiological conditions has hampered the implementation of silicon and other semiconductive materials into similar devices. Implanted medical devices should stay intact for months or even years without the need for removal due to restricted biocompatibility and foreign body reactions.We utilize single-molecule force spectroscopy (SMFS) in order to determine the adsorption free energy of poly(allylamine) (PAAm) on diamond surfaces of different termination and different age (Fig. 1A). In contrast to macroscopic setups, which suffer from bubbles and cavitation effects hampering equilibration, [15] our single-molecule approach allows for equilibration to be achieved on the experimental time scale. The forced desorption under equilibrium conditions is defined by a velocity-independent plateau of constant force over a separation defined by the polymer contour length and, thus, allows for a direct determination of the adsorption free energy per unit length from the area under the plateau curve (Fig. 1B).[16] The distribution of plateau forces for H-and O-terminated diamond are given in Figure 1C. The general observed trend of measuring higher adsorption forces and therefore higher free energies on freshly prepared, hydrophobic diamond compared to hydrophilic diamond is reversed after two months and can be r...

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Effect of iodide ions on the hydrogen-terminated and partially oxygen-terminated diamond surface

Cited by 35 publications

References 5 publications

Novel semiconductor materials for the development of chemical sensors and biosensors: A review

Novel semiconductor materials for the development of chemical sensors and biosensors: A review

Penicillin detection with nanocrystalline‐diamond field‐effect sensor

Aging of Hydrogenated and Oxidized Diamond

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