Biocompatibility of dielectric Ta2O5coatings inin vitrotests

Donkov, N; Mateev, E.; Zykova, A.; Safonov, V.; Luk'yanchenko, V

doi:10.1088/1742-6596/223/1/012030

Cited by 8 publications

(2 citation statements)

References 14 publications

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“…This cleaning step emphasizes further that the increase in the contact angles was due to the contaminants, as discussed above. In addition, the average contact angle value, 49.0° ± 2.2° was in complete compliance with the contact angle of clean, bare Ta 2 O 5 surfaces given in literature . This also proves that the cleaning process was carried out appropriately.…”

Section: Resultssupporting

confidence: 87%

Effect of Plasma Treatment on the Sensor Properties of a Light‐Addressable Potentiometric Sensor (LAPS)

Özsoylu

Kızıldağ

Schöning

et al. 2019

Physica Status Solidi (a)

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A light‐addressable potentiometric sensor (LAPS) is a field‐effect‐based (bio‐) chemical sensor, in which a desired sensing area on the sensor surface can be defined by illumination. Light addressability can be used to visualize the concentration and spatial distribution of the target molecules, e.g., H+ ions. This unique feature has great potential for the label‐free imaging of the metabolic activity of living organisms. The cultivation of those organisms needs specially tailored surface properties of the sensor. O2 plasma treatment is an attractive and promising tool for rapid surface engineering. However, the potential impacts of the technique are carefully investigated for the sensors that suffer from plasma‐induced damage. Herein, a LAPS with a Ta2O5 pH‐sensitive surface is successfully patterned by plasma treatment, and its effects are investigated by contact angle and scanning LAPS measurements. The plasma duration of 30 s (30 W) is found to be the threshold value, where excessive wettability begins. Furthermore, this treatment approach causes moderate plasma‐induced damage, which can be reduced by thermal annealing (10 min at 300 °C). These findings provide a useful guideline to support future studies, where the LAPS surface is desired to be more hydrophilic by O2 plasma treatment.

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Section: Resultssupporting

confidence: 87%

Effect of Plasma Treatment on the Sensor Properties of a Light‐Addressable Potentiometric Sensor (LAPS)

Özsoylu

Kızıldağ

Schöning

et al. 2019

Physica Status Solidi (a)

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“…Tantalum pentoxide (Ta 2 O 5 ) is an important semiconductor material exhibiting a high dielectric constant and refractive index [1,2] and therefore it is commonly used for capacitors and optical coatings. Moreover, it is a highly biocompatible [3] and corrosion resistant [2,4] material and recent investigations also indicate piezoelectric properties [5,6].…”

Section: Introductionmentioning

confidence: 99%

Complementary ab initio and X-ray nanodiffraction studies of Ta2O5

et al. 2015

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The complex structure of Ta2O5 led to the development of various structural models. Among them, superstructures represent the most stable configurations. However, their formation requires kinetic activity and long-range ordering processes, which are hardly present during physical vapor deposition. Based on nano-beam X-ray diffraction and concomitant ab initio studies, a new metastable orthorhombic basic structure is introduced for Ta2O5 with lattice parameters a = 6.425 Å, b = 3.769 Å and c = 7.706 Å. The unit cell containing only 14 atoms, i.e. two formula unit blocks in the c direction, is characterized by periodically alternating the occupied oxygen site between two possible positions in succeeding 002-planes. This structure can be described by the space group 53 (Pncm) with four Wyckoff positions, and exhibits an energy of formation of −3.209 eV atom−1. Among all the reported basic structures, its energy of formation is closest to those of superstructures. Furthermore, this model exhibits a 2.5 eV band gap, which is closer to experimental data than the band gap of any other basic-structure model. The sputtered Ta2O5 films develop only a superstructure if annealed at temperatures >800 °C in air or vacuum. Based on these results and the conveniently small unit cell size, it is proposed that the basic-structure model described here is an ideal candidate for both structure and electronic state descriptions of orthorhombic Ta2O5 materials.

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Heteroepitaxial growth of the orthorhombic Ta2O5 single-crystalline films on epi-GaN/α-Al2O3 (0001) substrates by MOCVD

Wang

et al. 2022

Ceramics International

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Biocompatibility of dielectric Ta₂O₅coatings inin vitrotests

Cited by 8 publications

References 14 publications

Effect of Plasma Treatment on the Sensor Properties of a Light‐Addressable Potentiometric Sensor (LAPS)

Effect of Plasma Treatment on the Sensor Properties of a Light‐Addressable Potentiometric Sensor (LAPS)

Complementary ab initio and X-ray nanodiffraction studies of Ta2O5

Heteroepitaxial growth of the orthorhombic Ta2O5 single-crystalline films on epi-GaN/α-Al2O3 (0001) substrates by MOCVD

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