Cl− sensitive biosensor used electrolyte-solution-gate diamond FETs

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

doi:10.1016/s0956-5663(03)00174-x

Cited by 45 publications

(33 citation statements)

References 14 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%

“…Another very attractive application of diamond, coming from the area of spectroelectrochemistry, was reported in 2001 [105], concerning a free-standing boron-doped diamond disc (0.38 mm thick and 8 mm in diameter) used for the oxidation of ferrocyanide, or the reduction of methyl viologen, and the simultaneous spectroscopic monitoring of the products through the disc. In the same year, the construction of an electrolyte-solution-gate diamond field-effect transistor (SGFET) was reported for the first time [106], and after 2 years, in 2003, the first anionsensitive diamond SGFET was reported from the same group as well [61,62]. The first bio-electrochemical application of diamond was reported in 2002, concerning the direct electrochemistry of cytochrome c at nanocrystalline boron-doped diamond [74].…”

Section: Diamondmentioning

confidence: 99%

See 1 more Smart Citation

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%

Section: Diamondmentioning

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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“…[3][4][5] So far, there have only been a few reports investigating the applicability of diamond-based IS-FET devices. [6][7][8] The p-type conductive layer which is induced at the diamond surface by a hydrogen termination has been suggested as a very promising sensing system to be used in a liquid electrolyte environment. For example, modified H-terminated diamond surfaces have been reported to be sensitive to Cl − and Br − ions.…”

mentioning

confidence: 99%

“…For example, modified H-terminated diamond surfaces have been reported to be sensitive to Cl − and Br − ions. 7 However, the sensitivity of diamond surfaces to changes in the pH of the electrolyte solution is still elusive. 6 "Conventional" ISFETs are based on an insulator͑oxide͒/semiconductor multilayer system, and their pH sensitivity is attributed to changes of the insulator surface potential which results from ion adsorption/ desorption at reactive oxygen surface groups.…”

mentioning

confidence: 99%

p H sensors based on hydrogenated diamond surfaces

Garrido

Härtl

Kuch

et al. 2005

Applied Physics Letters

109

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We report on the operation of ungated surface conductive diamond devices in electrolytic solutions. The effect of electrolyte pH on the channel conductivity is studied in detail. It is shown that fully hydrogen terminated diamond surfaces are not pH sensitive. However, a pronounced pH sensitivity arises after a mild surface oxidation by ozone. We propose that charged ions from the electrolyte adsorbed on the oxidized surface regions induce a lateral electrostatic modulation of the conductive hole accumulation layer on the surface. In contrast, charged ions are not expected to be adsorbed on the hydrogen terminated surface, either due to the screening induced by a dense layer of strongly adsorbed counter-ions or by the absence of the proper reactive surface groups. Therefore, the modulation of the surface conductivity is generated by the oxidized regions, which are described as microscopic chemical in-plane gates. The pH sensitivity mechanism proposed here differs qualitatively from the one used to explain the behavior of conventional ion sensitive field effect transistors, resulting in a pH sensitivity higher than the Nernstian limit.

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Cl− sensitive biosensor used electrolyte-solution-gate diamond FETs

Cited by 45 publications

References 14 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

p H sensors based on hydrogenated diamond surfaces

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