Photo-physical properties and quantum yield of some laser dyes in new polymer host

Al-shamiri, Hamdan A. S.; Kana, Maram T.H. Abou; Azzouz, I.M.; Badr, Y.

doi:10.1016/j.optlastec.2008.08.008

Cited by 19 publications

(5 citation statements)

References 16 publications

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“…Figure 2F shows the Raman spectral analysis of GMA, R 40 D 52 precursor, and microstructure by TPP, which also demonstrates the two-bond opening of vinyl on GMA during two-photon crosslinking. The =CH 2 bending vibration, C=C stretching vibration, and C=O stretching vibration of GMA in Raman spectroscopy were reported as 1425, 1644, and 1732 cm -1 , respectively [ 60 , 61 ] . Before the polymerization, BSA-GMA has Raman peaks of 1410 cm -1 as an in-plane deformation vibration of =CH 2 on GMA, 1643 cm -1 as a C=C double bond stretching with the C=O peak of amide I of BSA forming a double peak, and 1720 cm -1 as a C=O vibration peak on the GMA chain.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of biocompatible BSA-GMA and two-photon polymerization of 3D hydrogels with free radical type I photoinitiator

Li¹,

Liu²,

Guo³

et al. 2023

IJB

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Although the development of three-dimensional (3D) printing technology is growing rapidly in the biomedical field, it remains a challenge to achieve arbitrary 3D structures with high resolution and high efficiency. Protein hydrogels fabricated by two-photon polymerization (TPP) have excellent mechanical properties, high precision, and 3D architecture. However, a large number of the amino acid group in bovine serum albumin (BSA) would be consumed when the protein-based hydrogels use dyes of free radical type II photoinitiators. In this study, we use glycidyl methacrylate (GMA) to modify BSA molecules to obtain a series of BSA-GMA materials, allowing the protein material to be two-photon polymerized with a water-soluble free radical type I photoinitiator. The precisely controllable 3D structure of the BSA-GMA hydrogel was fabricated by adjusting the concentration of the precursor solution, the degree of methacrylation, and the processing parameters of the TPP technique. Importantly, BSA-GMA materials are free of acidic hazardous substances. Meanwhile, the water-soluble initiator lithium phenyl (2,4,6-trimethylbenzoyl) phosphite (LAP) allows TPP on the vinyl group of the GMA chain and thus without consuming its amino acid group. The as-prepared BSA-GMA hydrogel structure exhibits excellent autofluorescence imaging, pH responsiveness, and biocompatibility, which would provide new avenues for potential applications in tissue engineering and biomedical fields to meet specific biological requirements.

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Section: Resultsmentioning

confidence: 99%

Synthesis of biocompatible BSA-GMA and two-photon polymerization of 3D hydrogels with free radical type I photoinitiator

Li¹,

Liu²,

Guo³

et al. 2023

IJB

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“…(3) a. Also, the nonlinear properties, namely the third order refractive index (n 2 ) and the real part of the third order susceptibility (Rχ (3) ) of the doped films were investigated. The second experiment is the open aperture z-scan, illustrated in Figure -(3 b), where the aperture in front of the detector was removed and a converging lens was used to collect the incident laser beam transmitted from the sample.…”

Section: Z-scan Experimentsmentioning

confidence: 99%

“…The second experiment is the open aperture z-scan, illustrated in Figure -(3 b), where the aperture in front of the detector was removed and a converging lens was used to collect the incident laser beam transmitted from the sample. With the open aperture z-scan, the nonlinear absorption coefficient (β 2 ) and imaginary parts of the third-order nonlinear optical susceptibility (Imχ (3) ) of the doped films were measured. [14,15] The principle of the closed aperture Z-scan is based on the transformation of phase distortions to amplitude distortions when the sample moves through the beam propagation.…”

Section: Z-scan Experimentsmentioning

confidence: 99%

“…[1,2]. When this laser dye was doped with a polymer like PMMA, it provided a tunable range of laser wavelengths that covered electromagnetic spectra starting from UV through visible to infrared with high quantum efficiencies [3]. It caused important changes in their physical properties [4] and exhibited exceptional nonlinear optical properties.…”

Section: -Introdactionmentioning

confidence: 99%

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The Effects of Initial Laser Intensity on the Nonlinear Optical Properties of The Laser Dye DQOCI Doped Films Using Z-Scan Technique

Jaffar¹

2020

eijs

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This study is dedicated to investigate the effects of initial laser intensity on the nonlinear optical properties of the laser dye DQOCI dissolved in methanol with a concentration of 10 -5 M and doped with PMMA film. The properties were studied by using open and closed aperture Z-scan technique, with different levels of initial intensity (I0), excited by continuous diode solid-state laser at a wavelength of 532 nm. Three lenses of different focal lengths were employed to change the radius of the Gaussian laser beam and then change the initial intensity. For I0= 6.83 and 27.304 kWatt/cm2, the Z-scan curves show a saturation of absorption (SA) known as the negative type of nonlinearity, in which the absorption coefficient β 2 decreases and the transmittance increases with increasing the initial laser intensity. With I0 equal to 3.03 KWatt/cm2, the nonlinear absorption changes from SA to RSA, where the transmittances is reduced with the increase of intensity (z0) as analyzed by the theory of free carrier nonlinearities. The closed aperture z-scan shows a pre-focal transmittance minimum (valley) and a post focal transmittance maximum (peak) which reflects the z-scan signature of a positive nonlinearity (self-focusing) due to Kerr effect. Each of nonlinear refractive index (n2), nonlinear absorption coefficient (β 2), and third-order nonlinear optical susceptibility (χ3) are intensity-dependent.

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“…Organic dyes have various applications in many scientific branches due to their high fluorescence quantum yield and broad gain bandwidth [1]. The wide bandwidth makes them suitable for tunable ultrafast pulse generation [2]. The use of a synthetic polymer host presents advantages as these materials show much better compatibility with organic laser dyes, are amenable to inexpensive fabrication techniques, are good optical transparency at both the pump and lasing wavelengths, and resistance to pump laser radiation [3,4].…”

Section: Introductionmentioning

confidence: 99%

Studying the spectral properties of thin films of rhodamine (6G) dyes doped polymer (PMMA) dissolved in chloroform

Al-Hamdani¹

2019

IJP

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In the present work, poly methyl methacrylate (PMMA) doped with Rhodamine 6G was prepared. The spectral properties (absorption and fluorescence) of the films were studied at different concentrations (1x10-5, 2x10-5, 5x10-5, 7x10-5, and 1x10-4mol/l). The investigated samples were made in the form of thin films. This was achieved by dissolving a certain weight of PMMA in a fixed volume of chloroform, composite films was with thickness (25.8μm) at room temperature. The achieved results were pointed out that absorption and fluorescence spectra have taken a wide spectral rang so when increased the concentration each peak shift toward along wavelength. The quantum efficiency of the films were calculated as follows (98%,89%,84%,83% and 76%) for the above concentrations respectively. It has been noticed that the quantum efficiency decreases as the concentrations increases.

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Photo-physical properties and quantum yield of some laser dyes in new polymer host

Cited by 19 publications

References 16 publications

Synthesis of biocompatible BSA-GMA and two-photon polymerization of 3D hydrogels with free radical type I photoinitiator

Synthesis of biocompatible BSA-GMA and two-photon polymerization of 3D hydrogels with free radical type I photoinitiator

The Effects of Initial Laser Intensity on the Nonlinear Optical Properties of The Laser Dye DQOCI Doped Films Using Z-Scan Technique

Studying the spectral properties of thin films of rhodamine (6G) dyes doped polymer (PMMA) dissolved in chloroform

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