Silicone oil found in syringes commonly used for intravitreal injections

Agra, Lydianne Lumack do Monte; Melo, Gustavo Barreto; Filho, Acácio Alves Souza Lima; Ota, Shoko; Maia, Maurício

doi:10.5935/0004-2749.20190080

Cited by 7 publications

(4 citation statements)

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“…This further indicates that the surface coordination was greatly improved as a result of incorporation of Ce and Bi co-dopants, especially for uncoordinated Cl – ions that tend to dominate the spectra of undoped double perovskite NCs . The vibrations at 1260 to 900 cm –1 of silicone grease were also suppressed in both 2% Ce-doped and 1% Bi–2% Ce-co-doped Cs 2 AgInCl 6 NCs, which were well passivated by oleic acid and oleylamine …”

Section: Resultsmentioning

confidence: 90%

“…26 The vibrations at 1260 to 900 cm −1 of silicone grease were also suppressed in both 2% Ce-doped and 1% Bi−2% Ce-co-doped Cs 2 AgInCl 6 NCs, which were well passivated by oleic acid and oleylamine. 27 XPS was employed to study the influence of doping on the lattice coordination of Cs 2 AgInCl 6 NCs while using the C−C peak at 284.8 eV for calibration. Figure 3a shows that the C−O peak of the undoped Cs 2 AgInCl 6 NCs was located at 286.3 eV, while that for 1% Bi-doped, 2% Ce-doped, and 1% Bi−2% Ceco-doped perovskite NCs shifted to lower energies, namely, 286.0, 285.9, and 285.9 eV, respectively.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“… 26 The vibrations at 1260 to 900 cm –1 of silicone grease were also suppressed in both 2% Ce-doped and 1% Bi–2% Ce-co-doped Cs 2 AgInCl 6 NCs, which were well passivated by oleic acid and oleylamine. 27 …”

Section: Resultsmentioning

confidence: 99%

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Co-Doping of Cerium and Bismuth into Lead-Free Double Perovskite Cs₂AgInCl₆ Nanocrystals Results in Improved Photoluminescence Efficiency

Wang

Kershaw

et al. 2021

ACS Nanosci. Au

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Lead-free double cation metal halide perovskites have recently attracted considerable attention, with continuing research efforts focusing on the improvement of their stability and photoluminescence quantum yield (PL QY). In this study, Ce3+ has been co-doped together with Bi3+ into lead-free double perovskite Cs2AgInCl6 nanocrystals (NCs) in order to improve their crystallinity and PL QY. Both uncoordinated chloride ions and silver vacancies could be eliminated using this co-doping strategy, and the resulting Ce3+,Bi3+-co-doped Cs2AgInCl6 NCs showed adjustable PL emission peaks in the range of 589 to 577 nm by varying the doping amount of Ce3+ with a fixed feeding ratio of bismuth precursor set at 1%. Cs2AgInCl6 NCs doped with 1% Bi alone reached a PL QY of 10% for the PL peak centered at 591 nm, while those co-doped with 1% Bi and 2% Ce together achieved the highest PL QY of 26% for the PL peak centered at 580 nm. The use of Ce3+ as a dopant promoted the localization of self-trapped excitons to prevent PL quenching, although the ion’s 5d excited state may potentially provide an energetically favorable indirect route for the radiative relaxation process. This also resulted in a blue shift of the PL maximum and increased the exciton binding energy, thus promoting the radiative recombination of self-trapped excitons.

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Section: Resultsmentioning

confidence: 90%

Section: ■ Results and Discussionmentioning

confidence: 99%

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Co-Doping of Cerium and Bismuth into Lead-Free Double Perovskite Cs₂AgInCl₆ Nanocrystals Results in Improved Photoluminescence Efficiency

Wang

Kershaw

et al. 2021

ACS Nanosci. Au

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“…These are associated with the release agent used in the CS. [ 37,38 ] Although, the strong intensity of these peaks may have interfered the reading of important groups with absorption in close wavenumbers, such as, for example, the COC group (peak assignment between 1000 and 1300 cm −1 ) regarding the oxidative reaction. However, due to the nature of the reaction (thermo‐oxidative) and the increase in hardness of the aged samples (Table 1), it is suggested that the oxidative reactions contributed to the formation of new crosslinks.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of the aging of elastomeric acrylonitrile‐butadiene rubber and ethylene‐propylene‐diene monomer gaskets used to seal plates heat exchanger

Souza

Zanzi

Paiva

et al. 2021

Polymer Engineering & Sci

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Acrylonitrile‐butadiene rubber (NBR) and ethylene‐propylene‐diene monomer (EPDM) gaskets are used as seals in plates heat exchangers due to their elasticity and resilience. However, contact with fluids, oxygen, ozone, and heat lead to permanent deformation. This study investigates the degradation of gaskets submitted to similar service conditions: compressed in a groove for up to 360 h at 100 and 120°C. The analysis was carried through compression set (CS), compression stress relaxation, surface morphology, Shore A hardness, indentation modulus profile, crosslink density, and Fourier transform infrared region with attenuated total reflection analysis. For EPDM, in thermo‐oxidative aging there is a counterbalance between chain scission and crosslinking, which increases CS while hardness and crosslink density remain low. For NBR, diffusion‐limited oxidation causes heterogeneous oxidation, creating a crosslinking network near the surface. The values for CS, Shore A hardness, and crosslink density raised to 50%, 10%, and 75%, respectively. Furthermore, the side thermo‐oxidation was reduced due to the presence of the groove, which reduces oxygen access. Using FITR analysis, a thermo‐oxidative interaction mechanism was proposed for the EPDM and NBR gaskets. It was concluded that EPDM presented a more reliable behavior for the gasket and seal applications under the analyzed conditions.

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Jeringas para administración intraocular: revisión sistemática

Pascual Carrasco,

Espadas García,

Ramírez López

et al. 2024

Farmacia Hospitalaria

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Silicone oil found in syringes commonly used for intravitreal injections

Cited by 7 publications

References 0 publications

Co-Doping of Cerium and Bismuth into Lead-Free Double Perovskite Cs₂AgInCl₆ Nanocrystals Results in Improved Photoluminescence Efficiency

Co-Doping of Cerium and Bismuth into Lead-Free Double Perovskite Cs₂AgInCl₆ Nanocrystals Results in Improved Photoluminescence Efficiency

Evaluation of the aging of elastomeric acrylonitrile‐butadiene rubber and ethylene‐propylene‐diene monomer gaskets used to seal plates heat exchanger

Jeringas para administración intraocular: revisión sistemática

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Silicone oil found in syringes commonly used for intravitreal injections

Cited by 7 publications

References 0 publications

Co-Doping of Cerium and Bismuth into Lead-Free Double Perovskite Cs2AgInCl6 Nanocrystals Results in Improved Photoluminescence Efficiency

Co-Doping of Cerium and Bismuth into Lead-Free Double Perovskite Cs2AgInCl6 Nanocrystals Results in Improved Photoluminescence Efficiency

Evaluation of the aging of elastomeric acrylonitrile‐butadiene rubber and ethylene‐propylene‐diene monomer gaskets used to seal plates heat exchanger

Jeringas para administración intraocular: revisión sistemática

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Product

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Co-Doping of Cerium and Bismuth into Lead-Free Double Perovskite Cs₂AgInCl₆ Nanocrystals Results in Improved Photoluminescence Efficiency

Co-Doping of Cerium and Bismuth into Lead-Free Double Perovskite Cs₂AgInCl₆ Nanocrystals Results in Improved Photoluminescence Efficiency