Femtosecond UV laser non-ablative surface structuring of ZnO crystal: impact on exciton photoluminescence

Museur, L.; Michel, Jean-Pierre; Portes, Patrick; Englezis, Apostolis; Stassinopoulos, Andreas; Anglos, Demetrios; Kanaev, Andreï

doi:10.1364/josab.27.000531

Cited by 16 publications

(9 citation statements)

References 24 publications

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“…6 In the past few years, ZnO has become an extensively studied material for biosensing applications due to its unique properties like high catalytic efficiency, strong adsorption ability, bio-compatibility and high isoelectric point (IEP ∼9.5). 7 Number of biosensors has been reported in the literature for sensing various biomolecules like glucose, cholesterol, DNA, etc.…”

mentioning

confidence: 99%

“…[7][8][9] Though the potential of ZnO as a biosensor matrix has been well established, but its poor electrochemical behaviour is a major hindrance in the development of an efficient integrated biosensor. In this regard, a hybrid composite of ZnO with K 3 [Fe(CN) 6 ] mediator and Fe implanted ZnO has been reported, in which biosensing has been demonstrated in a mediator-free environment. 10,11 However, these biosensors demand a conducting bottom-electrode for efficient transfer of electrons generated in biochemical reactions to the external circuit.…”

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confidence: 99%

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Al and Fe co-doped transparent conducting ZnO thin film for mediator-less biosensing application

Saha

Gupta

2011

AIP Advances

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Highly c-axis oriented Al and Fe co-doped ZnO (ZAF) thin film is prepared by pulsed laser deposition. Fe introduces redox centre along with shallow donor level while Al doping enhances conductivity of ZnO, thus removing the requirement of both mediator and bottom conducting layer in bioelectrode. Model enzyme (glucose oxidase), was immobilized on surface of ZAF matrix. Cyclic voltammetry and photometric assay show that prepared bio-electrode is sensitive to glucose concentration with enhanced response of 0.18 μAmM-1cm-2 and low Km ∼ 2.01 mM. The results illustrate that ZAF is an attractive matrix for realization of miniaturized mediator-less solid state biosensor

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confidence: 99%

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confidence: 99%

Al and Fe co-doped transparent conducting ZnO thin film for mediator-less biosensing application

Saha

Gupta

2011

AIP Advances

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“…The observed saturation of the radiative transitions can be explained by the excited state quenching. In particular, the EHP continuum [12] and random volcano-like nanoholes tentatively assigned to thermal explosion of impurities due to multiple exciton condensation [13] appear in this range of fluences.…”

Section: Resultsmentioning

confidence: 87%

“…The nanostructuring of semiconductors is also observed in the regime of a strong electronic excitation well above the Mott density and below the ablation and melting thresholds [12,13]. In contrast to earlier observation of ripples, this structuring appears at a spatial scale of ∼10 nm and consists of nanoholes arranged quasi-periodically in straight and zigzag lines.…”

Section: Introductionmentioning

confidence: 70%

Effect of laser polarization and crystalline orientation on ZnO surface nanostructuring in the regime of high-density electronic excitation

et al. 2014

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The effect of laser polarization and crystalline orientation on nanoscale morphology of ZnO monocrystal has been studied in the regime of high-density electronic excitation related to the saturation of the exciton fluorescence and appearance of the electron-hole plasma continuum. The irradiation with femtosecond KrF laser (248 nm, 450 fs) was realized in the sub-melting regime of fluences about a half of the ablation threshold. Two types of nanostructures were observed: holes of 10 nm diameter arranged in quasi-periodic zigzag and straight lines, which propagate along the crystalline planes a, c, and m. The nanostructuring sensitively depends on the crystalline plane's orientation to laser electric field polarization (p). In crystalline planes c and m, the zigzag and straight lines propagate along the crystalline cell axes with respectively small (≤30°) and large (90°) inclination top. The nanostructuring in the crystalline plane a is rare and of low intensity. This behavior can be related to a stress field due to an accumulation of space charges in the crystalline structure.

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“…ZnO has found a wide range of applications [3][4][5][6][7][8][9][10]. However, the recent interdisciplinary research in the field of ZnO has led to the rapid development of a number of ZnO based biosensors [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Influence of stress in ZnO thin films on its biosensing application

Saha

Tomar

Gupta

2015

Enzyme and Microbial Technology

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Femtosecond UV laser non-ablative surface structuring of ZnO crystal: impact on exciton photoluminescence

Cited by 16 publications

References 24 publications

Al and Fe co-doped transparent conducting ZnO thin film for mediator-less biosensing application

Al and Fe co-doped transparent conducting ZnO thin film for mediator-less biosensing application

Effect of laser polarization and crystalline orientation on ZnO surface nanostructuring in the regime of high-density electronic excitation

Influence of stress in ZnO thin films on its biosensing application

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