Dielectric Properties of Oleic Acid in Liquid Phase

Sousa, Francisco F. de; Moreira, S. G. C.; Silva, Shirsley J. dos Santos da; Nero, Jordan Del; Alcántara, P.

doi:10.1166/jbns.2009.1013

Cited by 26 publications

(20 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The temperature dependence of RI can be described as 67,68 E Q -T A R G E T ; t e m p : i n t r a l i n k -; e 0 0 4 ; 6 3 ; 4 5 7 n ¼ n 0 þ ðdn∕dTÞT;…”

Section: Resultsmentioning

confidence: 99%

Monitoring of temperature-mediated phase transitions of adipose tissue by combined optical coherence tomography and Abbe refractometry

et al. 2018

View full text Add to dashboard Cite

Observation of temperature-mediated phase transitions between lipid components of the adipose tissues has been performed by combined use of the Abbe refractometry and optical coherence tomography. The phase transitions of the lipid components were clearly observed in the range of temperatures from 24°C to 60°C, and assessed by quantitatively monitoring the changes of the refractive index of 1- to 2-mm-thick porcine fat tissue slices. The developed approach has a great potential as an alternative method for obtaining accurate information on the processes occurring during thermal lipolysis.

show abstract

“…The temperature dependence of RI can be described as 67,68 E Q -T A R G E T ; t e m p : i n t r a l i n k -; e 0 0 4 ; 6 3 ; 4 5 7 n ¼ n 0 þ ðdn∕dTÞT;…”

Section: Resultsmentioning

confidence: 99%

Monitoring of temperature-mediated phase transitions of adipose tissue by combined optical coherence tomography and Abbe refractometry

et al. 2018

View full text Add to dashboard Cite

show abstract

“…For calculation of Δ f values, the refractive index values n for capping ligands were taken from reagent material safety data sheets (MSDS), and were 1.459, 1.447, 1.4496, and 1.33 for OA, TOPO, HDA, and water, respectively. Dielectric constants were approximated, based on literature data, to be: 2.03 (de Sousa et al 2009), 2.5 (Jiang et al 2000), 2.25 (Hoffman and Smyth 1949), and 78.3 for OA, TOPO, HDA, and water, respectively. We found that decreased ligand orientation polarizability factor ∆ f correlated with the progressive increase of the τ 2 as measured for the 5 D 0 excited state of Eu 3+ ions.…”

Section: Resultsmentioning

confidence: 99%

Ligand-dependent luminescence of ultra-small Eu3+-doped NaYF4 nanoparticles

et al. 2013

View full text Add to dashboard Cite

Pure cubic phase ultra-small α-NaYF4:4 % Eu3+ colloidal nanoparticles were synthesized by thermal decomposition reaction using three various capping ligands, i.e., oleic acid, trioctylphosphine oxide, and hexadecylamine. To expose as many Eu3+ ions as possible to interactions with the surface-bounded ligands, the nanoparticles were fabricated to have the diameters below 10 nm. The geometrical structure and properties of surface ligands needed for qualitative estimation of their influence on spectroscopic features of the investigated Eu3+ doped nanoparticles were obtained from DFT quantum-chemical calculations. Significant changes of luminescence spectra shapes and luminescence lifetime values were observed upon changes in the local chemical environment. We show that the ratio R = 5D0 → 7F1/5D0 → 7F2 of the intensities of the forced electric dipole (J = 2) and magnetic dipole (J = 1) transitions in the synthesized Eu3+ doped nanoparticles is highly sensitive to the type of ligand present on the nanoparticle surface. Similarly, 5D0 luminescence lifetimes are found to be sensitive to the refractive index, and also to the dielectric constant of ligands used during the synthesis to coat nanoparticles surface. We argue that the photophysical and electro-optical properties of colloidal Eu3+ doped inorganic nanoparticles show hyper-sensitive response to the chemical surroundings in the close vicinity of the nanoparticle itself. The behavior of both steady-state luminescence and its kinetics demonstrates the potential suitability of the studied nanoparticles for constructing self-referencing optical nano-sensors.Electronic supplementary materialThe online version of this article (doi:10.1007/s11051-013-1707-1) contains supplementary material, which is available to authorized users.

show abstract

“…which gives a value of 9.05 Â 10 8 V m À1 when e rDOPC as the relative permittivity of the DOPC hydrocarbon region is taken as that of oleic acid which is 2.5 [75]. Eq.…”

Section: Ir Drop Correctionmentioning

confidence: 99%