T.R. Cunha

ORCID: 0000-0003-1114-5208
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About
Contact & Profiles
Research Areas
  • Glass properties and applications
  • Crystal Structures and Properties
  • Multiferroics and related materials
  • Material Dynamics and Properties
  • Luminescence Properties of Advanced Materials
  • ZnO doping and properties
  • High-pressure geophysics and materials
  • Ferroelectric and Piezoelectric Materials
  • X-ray Diffraction in Crystallography
  • Mineralogy and Gemology Studies
  • Nuclear materials and radiation effects
  • Gas Sensing Nanomaterials and Sensors
  • Phase-change materials and chalcogenides
  • Gastric Cancer Management and Outcomes
  • Effects of Radiation Exposure
  • Crystallography and molecular interactions
  • Nonlinear Optical Materials Research
  • Advanced Condensed Matter Physics
  • Electronic and Structural Properties of Oxides
  • Colorectal and Anal Carcinomas
  • Iron oxide chemistry and applications
  • Solid State Laser Technologies
  • Zeolite Catalysis and Synthesis
  • Acoustic Wave Resonator Technologies
  • Magnetic Properties and Synthesis of Ferrites

Foton Motors (China)
2025

Optica
2025

Universidade Federal de Alfenas
2025

Universidade Federal de São Carlos
2016-2024

Hospital de Câncer de Barretos
2012-2019

Universidade Federal de Sergipe
2012-2017

For most silicates, controlling the crystallization - through nucleation, growth, and stabilization of distinct crystalline phase is critical to achieving desired physical properties in final glass-ceramic product. In this context, lead metasilicate PbSiO3 (PS) represents an ideal model system for investigating structural evolution under varying pressure temperature conditions. This primarily due its Raman signatures capability resolving structure with high precision diffraction...

10.48550/arxiv.2502.12274 preprint EN arXiv (Cornell University) 2025-02-17

Inorganic metal-halide perovskite materials pave the way for many applications ranging from optoelectronics to quantum information due their low cost, high photoluminescence and energy conversion efficiencies. However, light-induced bandgap instability ion migration in mixed-halide perovskites remains a significant challenge efficiency of optoelectronic devices. Thus, we combined hyperspectral fluorescence microspectroscopy computational methods understand underlying transition mechanism...

10.1021/acsami.4c19234 article EN cc-by ACS Applied Materials & Interfaces 2025-02-20

Crystallization proceeds through high-temperature and non-stoichiometric phases which recrystallize to become sanbornite (BaSi<sub>2</sub>O<sub>5</sub>) during heating or time.

10.1039/c8ce02054j article EN CrystEngComm 2019-01-01

ATiO3-type materials may exist in two different crystalline forms: the perovskite and ilmenite. While many papers have devoted their attention to evaluating structural properties of phase, stability ilmenite one still remains unsolved. Here, we present our results based on lattice dynamics first-principles calculations (density functional theory) CdTiO3 which are confronted with experimental data obtained through micro Raman spectroscopy that is a very good tool probe local crystal...

10.1088/1361-648x/aae803 article EN Journal of Physics Condensed Matter 2018-10-12

Abstract Barium silicates may be found in contact aureoles and are used several important technologies (e.g., LEDs). The BaO-SiO2 system stabilizes 13 crystalline phases with different silicate tetrahedral connectivity profiles. Aside from composed of a single structural unit (isolated or homo-connected tetrahedra), one encounters the relatively rare case hetero-connected tetrahedra which varying proportions Qn species linked together. Here, we analyze 29Si MAS NMR Raman spectroscopic...

10.2138/am-2021-7910 article EN American Mineralogist 2021-05-12

&lt;b&gt;&lt;i&gt;Objectives:&lt;/i&gt;&lt;/b&gt; The diagnostic performance of cytology in esophageal squamous cell carcinoma (ESCC) is meticulously described. &lt;b&gt;&lt;i&gt;Methods:&lt;/i&gt;&lt;/b&gt; Cytological and biopsy specimens were prospectively taken during esophagogastroduodenoscopy 123 individuals 2013 2014. Cytology samples maintained preservative fluid until processing biopsies formalin-fixed paraffin-embedded. &lt;b&gt;&lt;i&gt;Results:&lt;/i&gt;&lt;/b&gt; Based on...

10.1159/000496567 article EN Acta Cytologica 2019-01-01

Abstract We report a detailed study of 2‐amino‐5‐methyl‐1,3,4‐thiadiazole (C 3 H 5 N S) using Raman and infrared spectroscopy techniques combined with density functional theory at the condensed phase for isolated molecule in gas phase. This information provides vibrational mode assignments, which will give basis better understanding changes spectra due to temperature (from 10 413 K) pressure (up 9.2 GPa room temperature) variation. The anharmonic effects C S were identified range 10–393 K,...

10.1002/jrs.5451 article EN Journal of Raman Spectroscopy 2018-07-25
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