Optical Properties of Luminescent Materials

Ribeiro, Sidney J. L.; Santos, Molíria V.; Silva, Robson R.; Pécoraro, Édison; Gonçalves, Rogéria Rocha; Caiut, José Maurício A.

doi:10.1002/9783527670819.ch30

Cited by 6 publications

(3 citation statements)

References 130 publications

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“…Compared with two-photon techniques, the upconversion process allows for a much lower phonon energy and a much cheaper tunable near-infrared laser can be used as the light source. In addition, their narrow emission bandwidth, long luminescence lifetime, high chemical stability, single-photon emission, and low toxicity make UCNPs serve as bioimaging biolabels. − Therefore, UCNPs have been coupled with polymer materials (PEG, chitosan, polypeptide, MSN) used in many applications such as biological imaging and cancer therapy. ,− Zhao et al first demonstrated a controlled release of a drug under 980 nm NIR irradiation based on UCNPs . Then Chang-Ming Dong et al used a PNBC- b -PEO copolymer loaded with doxorubicin (DOX) and coated on the UC nanoparticles to realize an effective NIR light responsive drug release.…”

Section: Introductionmentioning

confidence: 99%

NIR-Responsive Copolymer Upconversion Nanocomposites for Triggered Drug Release in Vitro and in Vivo

Zhang

et al. 2018

ACS Appl. Bio Mater.

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Light has several advantages as the stimulus for a triggered drug release. Currently, the applications of phototriggered drug-release devices (PDDs) are largely limited by two factors: the limited tissue penetration and detrimental effects caused by excitation light (ultraviolet or visible light). To address this disadvantage, this study developed nanocomposites based on upconversion nanoparticles (UC), which could convert near-infrared light to ultraviolet–visible light and trigger drug release. By loading UC and doxorubicin (DOX) into photoresponsive copolymer PEG-NMAB-PLA (PNP), near-infrared responsive copolymer upconversion nanocomposites (PNP-DOX-UC) were constructed. We proved that PNP-DOX-UC showed the fast release and strong cytotoxicity under near-infrared irradiation in vitro. The therapeutic efficacy study indicated that PNP-DOX-UC+hv had the enhanced antitumor efficiency. In the study, UC becoming an internal ultraviolet–visible light source for near-infrared excitation develops an applicable and efficient approach to meet the requirements for UV/vis excitation, which is a major disadvantage in photosensitive materials developed for pharmaceutical and biomedical applications.

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Section: Introductionmentioning

confidence: 99%

NIR-Responsive Copolymer Upconversion Nanocomposites for Triggered Drug Release in Vitro and in Vivo

Zhang

et al. 2018

ACS Appl. Bio Mater.

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“…[52] Concerning electroluminescence, there is only one recent review addressing the application of dye-doped hybrids on LEDs. [53] In view of the current trends of the subject, and balancing the literature published since these reviews, we decide to not discuss the applications of luminescent hybrid materials in integrated optics and optical telecommunications, in biomedicine, and in solar cells.…”

Section: Feature Articlementioning

confidence: 99%

Optical Properties of Hybrid Organic‐Inorganic Materials and their Applications

Parola

Julián‐López

Carlos

et al. 2016

Adv Funct Materials

244

116

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Research on hybrid inorganic‐organic materials has experienced an explosive growth since the 1980s, with the expansion of soft inorganic chemistry based processes. Indeed, mild synthetic conditions, low processing temperatures provided by “chimie douce” and the versatility of the colloidal state allow for the mixing of the organic and inorganic components at the nanometer scale in virtually any ratio to produce the so called hybrid materials. Today a high degree of control over both composition and nanostructure of these hybrids can be achieved allowing tunable structure‐property relationships. This, in turn, makes it possible to tailor and fine‐tune many properties (mechanical, optical, electronic, thermal, chemical…) in very broad ranges, and to design specific multifunctional systems for applications. In particular, the field of “Hybrid‐Optics” has been very productive not only scientifically but also in terms of applications. Indeed, numerous optical devices based on hybrids are already in, or very close, to the market. This review describes most of the recent advances performed in this field. Emphasis will be given to luminescent, photochromic, NLO and plasmonic properties. As an outlook we show that the controlled coupling between plasmonics and luminescence is opening a land of opportunities in the field of “Hybrid‐Optics”.

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“…Incorporation of luminescent species in such materials gives rise to additional applications in photonics, medicine, sensing, and imaging as well. In fact, lanthanide-based materials possess special luminescence properties such as narrow photoluminescence peaks, tunable photostability, relatively high emission quantum yields, and emission lines spanning the electromagnetic spectrum from the ultraviolet to the infrared region, allowing high-technology applications. − …”

Section: Introductionmentioning

confidence: 99%

UV and Temperature-Sensing Based on NaGdF₄:Yb³⁺:Er³⁺@SiO₂–Eu(tta)₃

Nigoghossian

Messaddeq

Boudreau³

et al. 2017

ACS Omega

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A multifunctional nanosystem was synthesized to be used as a dual sensor of UV light and temperature. NaGdF 4 :Yb 3+ :Er 3+ upconverting nanoparticles (UCNPs) were synthesized and coated with a silica shell to which a europium(III) complex was incorporated. The synthesis of NaGdF 4 UCNPs was performed via thermal decomposition of lanthanide ion fluoride precursors in the presence of oleic acid. To achieve sufficient water dispersibility, the surface of the hydrophobic oleate-capped UCNPs in the hexagonal phase was modified by a silica coating through a modified Stöber process through a reverse microemulsion method. An Eu(tta) 3 (tta: thenoyltrifluoroacetonate) complex was prepared in situ at the silica shell. A dual-mode nanothermometer was obtained from a near infrared to visible upconversion fluorescence signal of Er 3+ ions together with UV-excited downshifting emission from the Eu 3+ complex. Measurements were recorded near the physiological temperature range (293–323 K), revealing excellent linearity ( R 2 > 0.99) and relatively high thermal sensitivities (≥1.5%·K –1 ). The Eu(tta) 3 complex present in the silica shell was tested as the UV sensor because of the Eu 3+ luminescence dependence on UV-light exposure time.

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Optical Properties of Luminescent Materials

Cited by 6 publications

References 130 publications

NIR-Responsive Copolymer Upconversion Nanocomposites for Triggered Drug Release in Vitro and in Vivo

NIR-Responsive Copolymer Upconversion Nanocomposites for Triggered Drug Release in Vitro and in Vivo

Optical Properties of Hybrid Organic‐Inorganic Materials and their Applications

UV and Temperature-Sensing Based on NaGdF₄:Yb³⁺:Er³⁺@SiO₂–Eu(tta)₃

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Optical Properties of Luminescent Materials

Cited by 6 publications

References 130 publications

NIR-Responsive Copolymer Upconversion Nanocomposites for Triggered Drug Release in Vitro and in Vivo

NIR-Responsive Copolymer Upconversion Nanocomposites for Triggered Drug Release in Vitro and in Vivo

Optical Properties of Hybrid Organic‐Inorganic Materials and their Applications

UV and Temperature-Sensing Based on NaGdF4:Yb3+:Er3+@SiO2–Eu(tta)3

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UV and Temperature-Sensing Based on NaGdF₄:Yb³⁺:Er³⁺@SiO₂–Eu(tta)₃