Luminescent sensor based on the lanthanide-fibroin composite

Rocha, Euzane G. da; Pugina, Roberta S.; Caiut, José Maurício A.

doi:10.1016/j.optmat.2020.110236

Cited by 12 publications

(6 citation statements)

References 49 publications

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“…SF-based biomaterials have been extensively explored in optical − and biomedical ,,− fields and have been incorporated with different materials or chemically modified to produce luminescent SF materials for a wide range of applications, including luminescent sensors − and bioimaging, − light conversion, , luminescent solar cells devices, , and construction of the organic light-emitting diodes (OLEDs) based on low-molecular-mass thin films …”

Section: Resultsmentioning

confidence: 99%

Direct Femtosecond Laser Printing of Silk Fibroin Microstructures

Santos

Paula

Andrade

et al. 2020

ACS Appl. Mater. Interfaces

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Fabrication of functional silk fibroin microstructures has extensive applications in biotechnology and photonics. Considerable progress has been made based on lithographic methods and self-assembly approaches. However, most methods require chemical modification of silk fibroin, which restricts the functionalities of the designed materials. At the same time, femtosecond laser-induced forward transfer (fs-LIFT) has been explored as a simple and attractive processing tool for microprinting of high-resolution structures. In this paper, we propose the use of LIFT with fs-pulses for creating high-resolution structures of regenerated silk fibroin (SF). Furthermore, upon adding Eu3+/Tb3+ complexes to SF, we have been able to demonstrate the printing by LIFT of luminescent SF structures with a resolution on the order of 2 μm and without material degradation. This approach provides a facile method for printing well-defined two-dimensional (2D) micropatterns of pure and functionalized SF, which can be used in a wide range of optical and biomedical applications.

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Section: Resultsmentioning

confidence: 99%

Direct Femtosecond Laser Printing of Silk Fibroin Microstructures

Santos

Paula

Andrade

et al. 2020

ACS Appl. Mater. Interfaces

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“…16,75 In this regard, fibroin has been extensively studied and stands out against other materials thanks to its unique properties, which include being mechanically robust 1,14,74 and transparent throughout the visible spectrum, presenting smooth surface and variable refractive index, [81][82][83] and being susceptible to physical changes in its structure. 76,77 All these characteristics allow the preparation of passive or active devices 75 based on pure fibroin 16 or fibroin in the presence of other components, 167 to provide materials like supports for electrodes, 16,221 lasers, [168][169][170][171][172][173][174] biosensors, [175][176][177][178][179][180] waveguide, 83,181,182 fuel cells, 183 and energy storage devices. 184 Kim and collaborators built an electrode consisting of a chip supported on an ultrathin and resorbable fibroin substrate.…”

Section: Electronic and Photonic Devicesmentioning

confidence: 99%

Silk: history, obtaining, structure and properties of an old material in the development of new technologies

Pugina

Caiut

2021

IJAMB

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The silk produced in the Bombyx mori’ glands and used in the preparation of the cocoons has been employed in the textile industry millennia ago in fabric production. These cocoons are composed mainly of fibroin (SF, Silk Fibroin), a fibrous protein that presents unique mechanical properties, in addition to being a biocompatible, biodegradable and low-cost source. This protein can be extracted from these cocoons by being processed in aqueous medium and used to obtain the most diverse materials for different applications, such as biomaterials development as body implants and in the composition of the scaffolds for tissue engineering, moreover to photonic devices as sensors, waveguides and lasers.

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“…Moreover, Ln-doped fibers have been employed in the production of lasers (amplifiers rare-earth-doped silica and fluorozirconate fibers, particularly erbium-doped fibers) ( Digonnet, 2001 ) and smart Dy +3 and Eu +3 doped stimuli-responsive textiles ( Shen et al, 2021 ). In addition, Tryptophan and Tyrosine can act as sensitizers for lanthanide ions enhancing their emission ( da Rocha et al, 2020 ). Therefore, combining the mechanical and optical properties of SF with those of lanthanides ions could be an interesting approach for the development of new photonic systems, particularly appealing due to the high biocompatibility and biodegradability of SF.…”

Section: Introductionmentioning

confidence: 99%

“…Few examples of SF films and powders doped with lanthanides have been reported so far and are limited to Eu +3 and Tb +3 ( Pugina et al, 2019a , b ; da Rocha et al, 2020 ). In a previous work ( Rizzo et al, 2020b ) we have described a simple method for doping fibrous SF with Ce +3 .…”

Section: Introductionmentioning

confidence: 99%

Bombyx mori Silk Fibroin Regeneration in Solution of Lanthanide Ions: A Systematic Investigation

Rizzo

Presti

Giannini

et al. 2021

Front. Bioeng. Biotechnol.

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Silk Fibroin (SF) obtained from Bombyx mori is a very attractive biopolymer that can be useful for many technological applications, from optoelectronics and photonics to biomedicine. It can be processed from aqueous solutions to obtain many scaffolds. SF dissolution is possible only with the mediation of chaotropic salts that disrupt the secondary structure of the protein. As a consequence, recovered materials have disordered structures. In a previous paper, it was shown that, by modifying the standard Ajisawa’s method by using a lanthanide salt, CeCl3, as the chaotropic agent, it is possible to regenerate SF as a fibrous material with a very ordered structure, similar to that of the pristine fiber, and doped with Ce+3 ions. Since SF exhibits a moderate fluorescence which can be enhanced by the incorporation of organic molecules, ions and nanoparticles, the possibility of doping it with lanthanide ions could be an appealing approach for the development of new photonic systems. Here, a systematic investigation of the behavior of degummed SF in the presence of all lanthanide ions, Ln+3, is reported. It has been found that all lanthanide chlorides are chaotropic salts for solubilizing SF. Ln+3 ions at the beginning and the end of the series (La+3, Pr+3, Er+3, Tm+3, Yb+3, Lu+3) favor the reprecipitation of fibrous SF as already found for Ce+3. In most cases, the obtained fiber preserves the morphological and structural features of the pristine SF. With the exception of SF treated with La+3, Tm+3, and Lu+3, for all the fibers re-precipitated a concentration of Ln+3 between 0.2 and 0.4% at was measured, comparable to that measured for Ce+3-doped SF.

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Luminescent sensor based on the lanthanide-fibroin composite

Cited by 12 publications

References 49 publications

Direct Femtosecond Laser Printing of Silk Fibroin Microstructures

Direct Femtosecond Laser Printing of Silk Fibroin Microstructures

Silk: history, obtaining, structure and properties of an old material in the development of new technologies

Bombyx mori Silk Fibroin Regeneration in Solution of Lanthanide Ions: A Systematic Investigation

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