TiO2 brookite nanostructured thin layer on magneto-optical surface plasmon resonance transductor for gas sensing applications

Manera, Maria Grazia; Colombelli, Adriano; Rella, R.; Caricato, Anna Paola; Cozzoli, P. Davide; Martino, M.; Vasanelli, L.

doi:10.1063/1.4751347

Cited by 27 publications

(17 citation statements)

References 51 publications

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“…In general, the excitation of surface plasmon polaritons in these sensors requires total reection conditions using the Kretschmann-Raether con guration with an optical prism. [24][25][26][27] In contrast, an extraordinarily high θ K can be obtained in our MO cavity under simple measurement conditions using normal incident light. The MO cavity sensor monitors the modulation of light, and θ K of ±20 approximately corresponds to the intensity modulation of ±32% for the re ected light through a polarizer.…”

Section: Mo Cavity For Chemical Sensingmentioning

confidence: 94%

“…[20][21][22][23] Modulation techniques based on the combination of the MO effect and SPR have yielded chemical and biological sensors with high sensitivity. [24][25][26][27] In addition to a large MO effect, perpendicular magnetic anisotropy is a prerequisite for applications such as high-density magnetic and MO recording media, 28) high-resolution MO SLMs, 29,30) and spin electronic devices. [31][32][33] Large perpendicular magnetic anisotropy is required in spin electronics because random access memories need high-density memory cells.…”

Section: Introductionmentioning

confidence: 99%

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Magneto-Optical Enhancement and Chemical Sensing Applications of Perpendicular Magnetic CoPt/Ag Stacked Structures with a ZnO Intermediate Layer

2016

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The magneto-optical (MO) properties of perpendicular magnetic Co 80 Pt 20 /Ag stacked lms with ZnO intermediate layers of different thickness were investigated by polar Kerr measurements. The insertion of a thin ZnO layer at the CoPt/Ag interface improved the perpendicular magnetic properties and MO enhancement at the plasma edge of Ag. The CoPt/Ag stacked lms with a 2-nm-thick ZnO layer exhibited an ideal square out-of-plane hysteresis loop with a relatively large Kerr angle of approximately 1.4 in the ultraviolet region. The peak position of the MO plasma enhancement shifted to longer wavelength as the thickness of the ZnO layer increased, and a new peak appeared consistent with the band-gap energy of ZnO. Moreover, the CoPt/ZnO/Ag stacked layer acted as a Fabry-Pérot etalon when the thickness of the ZnO layer was the sub-wavelength of incident light. As a result, a MO cavity was realized in the stacked lms, and an ideal square MO loop with a large Kerr rotation angle of approximately 20 was obtained in the visible region. The MO enhancement factor reached approximately 200. We demonstrated that the stacked lms were sensitive to changes in the optical conditions at the lm surface. The developed MO cavity can act as a highly accurate chemical and biological sensing system under simple measurement conditions.

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Section: Mo Cavity For Chemical Sensingmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Magneto-Optical Enhancement and Chemical Sensing Applications of Perpendicular Magnetic CoPt/Ag Stacked Structures with a ZnO Intermediate Layer

2016

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“…For example, TiO 2 thin films have been used in catalysis [1][2][3], gas sensing [4][5][6] and solar energy conversion [7][8][9], while BaO finds applications including high current density cathodes [10][11][12], thermionic energy converters [13] and optical devices [14][15][16]. The properties utilized in these applications are partially determined by the film structure, in which the substrate for the thin film growth plays an essential role.…”

Section: Introductionmentioning

confidence: 99%

Initial growth stages of titanium and barium oxide films on SrTiO3(001)

Kruska¹,

Castell²

2013

Surface Science

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“…Recently, as a significant photoactive ingredient, they have been employed to improve solar cells (Nel et al, 2009;Chen et al, 2012;Banerjee et al, 2015) and photocatalytic reactions (Sun et al, 2006;Manera et al, 2012;Xiao, 2012). However, their applications in the biomedical field are still underdeveloped due to concerns about their biosafety (Homola, 2006;, or in other words, due to their long-term toxic effects (Han et al, 2011;He et al, 2011).…”

Section: Titanium Dioxidementioning

confidence: 99%

“…Generally, while changing their optical and catalytic properties, catechol ligand derivatives can form stable bonds on TiO 2 surface (Jokinen et al, 1998;Manera et al, 2012;Xiao, 2012;Park et al, 2013). These groups can then be used for further surface functionalizations with biomolecules.…”

Section: Titanium Dioxidementioning

confidence: 99%

Hybrid nanomaterial: biocolloidals

Gözübenli¹,

Yasun²,

Dilsiz³

2017

Turk J Biol

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Nanomaterials-based diagnostics have tremendous advantages over other conventional diagnostic systems in terms of sensitivity, specificity, and portability owing to the unique intrinsic properties of nanomaterials. Thus, there is a substantial need to develop and employ a broad spectrum of nanomaterials for biological and diagnostic applications. In this review, we focus on nanomaterials-assisted disease diagnosis utilizing different techniques such as photoluminescence, colorimetry, fluorescence, electrochemistry, microarray methods, surface plasmon resonance, and surface-enhanced Raman spectroscopy. In these techniques, different nanomaterials, including but not limited to gold and silver materials, metal oxides, and semiconductors, were employed according to their all-purpose chemical and physical properties. As the new properties of nanomaterials are discovered, their contributions to nanobiotechnology applications are vastly increased. In this review, the features of the selected nanobiomaterials, biological tag-modified nanomaterials, and their outstanding applications for the detection of specific biotargets have been summarized according to the latest studies. Nanomaterials contribute to the fields of photo/chemotherapy and biomedical imaging in particular, since all the biological events happen within this size range and beneficiary roles of nanoparticles (NPs) are countless in biomedical applications due to their unique physical and chemical properties. However, due to the necessity of specificity and selectivity, there is a clear ambition to study bioconjugation of NPs to increase the efficiency of the targeted biological applications. Thus, the combination of the specificity and the intrinsic properties of biohybrid NPs facilitate diagnostic and therapeutic applications.

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TiO2 brookite nanostructured thin layer on magneto-optical surface plasmon resonance transductor for gas sensing applications

Cited by 27 publications

References 51 publications

Magneto-Optical Enhancement and Chemical Sensing Applications of Perpendicular Magnetic CoPt/Ag Stacked Structures with a ZnO Intermediate Layer

Magneto-Optical Enhancement and Chemical Sensing Applications of Perpendicular Magnetic CoPt/Ag Stacked Structures with a ZnO Intermediate Layer

Initial growth stages of titanium and barium oxide films on SrTiO3(001)

Hybrid nanomaterial: biocolloidals

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