A urea biosensor based on pH-sensitive Sm2TiO5 electrolyte–insulator–semiconductor

Pan, Tung-Ming; Huang, Ming-De; Lin, Wan-Ying; Wu, Min‐Hsien

doi:10.1016/j.aca.2010.04.045

Cited by 26 publications

(12 citation statements)

References 39 publications

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“…[1][2][3][4][5][6][7] The applications of Ln 2 TiO 5 compounds range from high-permittivity dielectrics, biomedical sensing [1][2][3][4][5][6][7] to nuclear reactor control rod materials [8][9][10] and nuclear waste forms. 11 Lanthanide oxides as alloying constituents can be used as neutron absorbers in control rods.…”

Section: Introductionmentioning

confidence: 99%

First principles investigation of structural, electronic, elastic and thermal properties of rare-earth-doped titanate Ln2TiO5

et al. 2012

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Systematic first-principles calculations based on density functional theory were performed on a wide range of Ln2TiO5 compositions (Ln = La, Ce, Pr, Nd, Sm, Gd, Tb, Dy and Y) in order to investigate their structural, elastic, electronic, and thermal properties. At low temperature, these compounds crystallize in orthorhombic structures with a Pnma symmetry, and the calculated equilibrium structural parameters agree well with experimental results. A complete set of elastic parameters including elastic constants, Hill's bulk moduli, Young's moduli, shear moduli and Poisson's ratio were calculated. All Ln2TiO5 are ductile in nature. Analysis of densities of states and charge densities and electron localization functions suggests that the oxide bonds are highly ionic with some degree of covalency in the Ti-O bonds. Thermal properties including the mean sound velocity, Debye temperature, and minimum thermal conductivity were obtained from the elastic constants

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Section: Introductionmentioning

confidence: 99%

First principles investigation of structural, electronic, elastic and thermal properties of rare-earth-doped titanate Ln2TiO5

et al. 2012

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“…In addition, the increase of the surface sites could transform the surface morphologies as revealed in AFM images as shown in Fig. 4 30 . CF 4 plasma could cause the membrane fluorinated and hence induce the formation of the fluorine atom related surface sites, which could enhance detection of various ions on the surface 31 , 32 .…”

Section: Resultsmentioning

confidence: 99%

Magnesium Oxide (MgO) pH-sensitive Sensing Membrane in Electrolyte-Insulator-Semiconductor Structures with CF4 Plasma Treatment

Kao

Chang

et al. 2017

Sci Rep

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Magnesium oxide (MgO) sensing membranes in pH-sensitive electrolyte-insulator-semiconductor structures were fabricated on silicon substrate. To optimize the sensing capability of the membrane, CF4 plasma was incorporated to improve the material quality of MgO films. Multiple material analyses including FESEM, XRD, AFM, and SIMS indicate that plasma treatment might enhance the crystallization and increase the grain size. Therefore, the sensing behaviors in terms of sensitivity, linearity, hysteresis effects, and drift rates might be improved. MgO-based EIS membranes with CF4 plasma treatment show promise for future industrial biosensing applications.

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“…For the rare earth titanate compounds of RE 2 TiO 5 stoichiometry, a variety of structures and chemistries exist. A range of applications for these compounds have been studied including burnable poisons [9,10], containment matrices for immobilisation of high-level nuclear waste [11][12][13][14][15][16], lithium ion and sodium ion batteries [17], and electronic and ionic conductivity [18][19][20]. Application-based studies on RE 2 ZrO 5 and RE 2 SnO 5 compositions are almost nonexistent although there has been some interest in the zirconates for nuclear-based use, e.g.…”

Section: Introductionmentioning

confidence: 99%

The ion irradiation tolerance of the fluorite RE2MO5 (RE = Sm, and Yb, M = Ti, Zr, and Sn) system

Aughterson

Newman²,

Ionescu

et al. 2021

J Aust Ceram Soc

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In the search for novel ceramics for use within nuclear fuel-related applications and nuclear waste-form matrices, a major focus has been on the development of radiation-tolerant materials. Of particular interest in this field have been numerous compounds with either pyrochlore or the related fluorite-type structures. In this study, we look to expand the family of compounds with defect fluorite-type structure. We have fabricated three new compounds; Yb 2 Sn 1.125 O 5.25 , Yb 2 Sn 1.25 O 5.5 , and Yb 2 Sn 1.375 O 5.75 . The compound Yb 2 Sn 1.125 O 5.25 was determined, via x-ray diffraction, to have the long-range defect fluorite structure, Fm-3 m symmetry, with cell parameter a = 5.17233(1). Further to this, Sm 2 ZrO 5 and Yb 2 TiO 5 compounds were also fabricated and crystal structures characterised. The use of transmission electron microscopy has revealed a much more complex crystal structure than that of the relatively high symmetry fluorite, with the presence of structural modulations being detected. The ion-irradiation response of these compounds was tested via bulk specimen irradiation using 15-MeV gold ions with grazing incidence x-ray diffraction characterisation. The results show that both Sm 2 ZrO 5 and Yb 2 Sn 1.25 O 5.5 are highly tolerant to ion-irradiation exposure whilst Yb 2 TiO 5 is susceptible to amorphisation.

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A urea biosensor based on pH-sensitive Sm2TiO5 electrolyte–insulator–semiconductor

Cited by 26 publications

References 39 publications

First principles investigation of structural, electronic, elastic and thermal properties of rare-earth-doped titanate Ln2TiO5

First principles investigation of structural, electronic, elastic and thermal properties of rare-earth-doped titanate Ln2TiO5

Magnesium Oxide (MgO) pH-sensitive Sensing Membrane in Electrolyte-Insulator-Semiconductor Structures with CF4 Plasma Treatment

The ion irradiation tolerance of the fluorite RE2MO5 (RE = Sm, and Yb, M = Ti, Zr, and Sn) system

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