Raman investigation of nanosized TiO2

Gotić, Marijan; Ivanda, Mile; Popović, Stanko; Musić, S.; Sekulić, Andreja; Turković, Aleksandra; Furić, Krešimir

doi:10.1002/(sici)1097-4555(199707)28:7<555::aid-jrs118>3.3.co;2-j

Cited by 26 publications

(35 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the spectra set I, the peaks near 395 cm −1 (B 1g mode) and 630 cm −1 (E g ) corresponding to anatase phase (labeled as A) of TiO 2 are observed. [40,41] A third peak that belongs to anatase is near 510 cm −1 (A 1g ), but this peak overlaps with the silicon peak and is hard to resolve. The peaks observed in most of the samples at 521 cm −1 and near 950 cm −1 are the fundamental and second order of Si Raman signals (Si), respectively.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Surface enhanced Raman scattering of nano diamond using visible‐light‐activated TiO₂ as a catalyst to photo‐reduce nano‐structured silver from AgNO₃ as SERS‐active substrate

Hong

Perevedentseva

Treschev

et al. 2009

J Raman Spectroscopy

View full text Add to dashboard Cite

In this work, we demonstrate nano-structured silver particles photo-reduced from silver nitride (AgNO 3 ) solution using visible-light-activated titanium dioxide (TiO 2 ), which can be a convenient and effective substrate for surface enhanced Raman spectroscopy (SERS) observation. Visible-light-activated carbon-containing TiO 2 nanoparticles are applied to photo-reduce and form nano-structured silver from AgNO 3 upon visible-light illumination. Photo-reduced nano-structured silver is used as an active substrate for SERS studies of TiO 2 as well as nano diamond and TiO 2 . The photo reduction of AgNO 3 and SERS observation can be obtained by simultaneously using the same visible laser excitation. The coexistence of the anatase phase with small admixture of the rutile phase in the TiO 2 can be observed using SERS. The carbon structure in the carbon-containing TiO 2 was determined to be sp 2 type carbon bonding by SERS.

show abstract

Section: Resultsmentioning

confidence: 99%

“…from NO 3 − radical at 1040 cm −1 ). [42] For C200 nano-particle powders, the samples are not homogeneous; the coexistence of anatase and rutile (R, with Raman peaks near 445 cm −1 , E g mode, and A 1g mode near 610 cm −1 [40,41] ) phases can be observed before Ag deposition (Fig. 3, set II).…”

Section: Resultsmentioning

confidence: 99%

Surface enhanced Raman scattering of nano diamond using visible‐light‐activated TiO₂ as a catalyst to photo‐reduce nano‐structured silver from AgNO₃ as SERS‐active substrate

Hong

Perevedentseva

Treschev

et al. 2009

J Raman Spectroscopy

View full text Add to dashboard Cite

show abstract

“…This transition depends on several factors such as the size of particles, the presence of other minerals like iron-rich clay minerals and, above all, the firing temperature. [35] Since the reactions occur in the solid state and that the heating rate is high, the co-existence of low-and high-temperature mineral phases is possible. In this sense, besides anatase, rutile was also widely detected among the samples, which is characterised by the following Raman bands: 240, 438 and 606 cm −1 (Fig.…”

Section: Micro-raman Spectroscopymentioning

confidence: 99%

Characterisation of fine wall and eggshell Roman pottery by Raman spectroscopy

Olivares¹,

Zuluaga²,

Ortega³

et al. 2010

J Raman Spectroscopy

View full text Add to dashboard Cite

Roman pottery from the Oiasso harbour (nowadays Irun, Basque Country) was thoroughly studied by micro-Raman spectroscopy and X-ray diffraction (XRD) analysis in order to identify and characterise the mineralogical composition of those samples and to get a deeper insight into the technologies involved in the elaboration of the ceramic artefacts. The diffraction pattern of the ceramic body shows the presence of mullite and trydimite, which suggests firing temperatures above 1100 • C, and alumina-rich raw materials. Additionally, the presence of pseudowollastonite and diopside observed by the XRD and Raman spectroscopy is explained by the high firing temperatures of lime-rich raw materials. Raman microscopy has also provided further information about the heating temperature and composition of the raw materials. The presence of rutile instead of anatase also suggests a strong heating process. Moreover, the presence of hematite (α-Fe 2 O 3 ) and maghemite (γ -Fe 2 O 3 ) instead of magnetite (Fe 3 O 4 )suggests the oxidising conditions during ceramics firing. The comparison of the minerals found in the different Roman potteries with the characteristic mineralogy of the archaeological site suggests the use of raw material coming from different source areas, opening up an interesting discussion about the commercial networks.

show abstract

“…In particular, this phonon confinement effect is more dominant at low frequency, so it is possible to determine the size of nanoparticles from a measurement of the maximum of the low frequency Raman band [201][202][203]. Additionally, because of the increase in the surfaceto-volume ratio at the nanoscale, the surface modes become dominant as particle size decreases.…”

Section: Raman Spectroscopymentioning

confidence: 99%

Recent developments in TiO2 as n- and p-type transparent semiconductors: synthesis, modification, properties, and energy-related applications

2015

View full text Add to dashboard Cite

TiO 2 -based thin films and nanomaterials have been fabricated via physical and solution-based techniques by various research groups around the globe. Generally, most applications of TiO 2 involve photocatalytic activity for water and air purification, self-cleaning surfaces, antibacterial activity, and superhydrophilicity. As a widebandgap semiconductor, modified TiO 2 belongs to a class of materials called transparent semiconducting oxides (TSOs), which are simultaneously optically transparent and electrically conductive. TSOs continue to be in high demand for a variety of applications ranging from transparent electronics and sensor devices to light detecting and emitting devices in telecommunications. However, reports on TiO 2 applications as an effective TSO for transparent electronics applications have been limited. In general, TiO 2 is intrinsically an n-type semiconductor but can be doped to have p-type semiconductivity. This provides a very important opportunity to fabricate all-transparent homojunction devices for light harvesting and energy storage. P-type TSOs have recently attracted tremendous interest in the field of active devices for emerging transparent electronics for potential use in ultra-violet light-based solar cells. Therefore, a detailed overview of the synthesis, band structure modification via doping, properties, and applications of modified TiO 2 as n-and p-type TSOs is warranted. This article comprehensively reviews the latest developments. The discussion includes solution-based wet chemical techniques and vacuum-based dry physical techniques fabricating TiO 2 -TSOs. The synthesis of p-TiO 2 in particular is discussed in detail as it may provide interesting breakthroughs in emerging transparent electronics applications. Also, the structural, optical, and electrical properties of TiO 2 are discussed in the context of TSO applications, specifically the defect chemistry of TiO 2 to obtain n-and p-type semiconductivity, which could provide interesting insights into the band structure engineering of TiO 2 for conductivity reversal. Applications of both nand p-type TiO 2 have been reviewed in detail in relation to thin film transparent homo/heterojunction devices, dyesensitized solar cells, electrochromic displays, and other energy-related applications.

show abstract

Raman investigation of nanosized TiO2

Cited by 26 publications

References 0 publications

Surface enhanced Raman scattering of nano diamond using visible‐light‐activated TiO₂ as a catalyst to photo‐reduce nano‐structured silver from AgNO₃ as SERS‐active substrate

Surface enhanced Raman scattering of nano diamond using visible‐light‐activated TiO₂ as a catalyst to photo‐reduce nano‐structured silver from AgNO₃ as SERS‐active substrate

Characterisation of fine wall and eggshell Roman pottery by Raman spectroscopy

Recent developments in TiO2 as n- and p-type transparent semiconductors: synthesis, modification, properties, and energy-related applications

Contact Info

Product

Resources

About

Raman investigation of nanosized TiO2

Cited by 26 publications

References 0 publications

Surface enhanced Raman scattering of nano diamond using visible‐light‐activated TiO2 as a catalyst to photo‐reduce nano‐structured silver from AgNO3 as SERS‐active substrate

Surface enhanced Raman scattering of nano diamond using visible‐light‐activated TiO2 as a catalyst to photo‐reduce nano‐structured silver from AgNO3 as SERS‐active substrate

Characterisation of fine wall and eggshell Roman pottery by Raman spectroscopy

Recent developments in TiO2 as n- and p-type transparent semiconductors: synthesis, modification, properties, and energy-related applications

Contact Info

Product

Resources

About

Surface enhanced Raman scattering of nano diamond using visible‐light‐activated TiO₂ as a catalyst to photo‐reduce nano‐structured silver from AgNO₃ as SERS‐active substrate

Surface enhanced Raman scattering of nano diamond using visible‐light‐activated TiO₂ as a catalyst to photo‐reduce nano‐structured silver from AgNO₃ as SERS‐active substrate