Article
Optics
Ali Bavali, Ali Rahmatpanahi, Zahra Niknam
Summary: The angular dependence of diffusive random laser emission is evaluated by exciting a highly concentrated solution. Dimerization at high concentrations leads to random fluctuation of the dielectric constant and provides multiple scattering events and enhanced backscattering. Förster resonance energy transfer and anisotropic inner filter effect have a significant impact on the unique spectral features of RL emission.
Article
Optics
Hong Chen, Shaohua Gao, Fei Gao, Jianzhong Zhang, Lijun Qiao, Tao Wang, Mingjiang Zhang
Summary: Random lasing was successfully generated in a short erbium-doped fiber with the lowest threshold power of 15.2 mW and maximum optical conversion efficiency of 16% observed at 11m EDF length. The output spectral characteristics showed random spectral peaks with high OSNR and narrowed linewidth of 300 Hz, indicating potential for development of narrow linewidth ERFL.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Polymer Science
Konrad Cyprych, Lech Sznitko
Summary: This study investigates the random lasing phenomenon in a dye-doped polymeric double-phase system and explores how relative concentrations of polymers can influence lasing parameters. The influence of phase separation-induced disorder on supporting RL, the ability to switch between waveguiding and quasi-waveguiding regimes, and the fabrication of efficient materials for RL using a simple phase separation technique are highlighted. The technique offers a fast, cheap, and easy way to tailor lasing properties in the laser material fabrication process.
Article
Materials Science, Ceramics
Chenghong Wang, Xian Zhang, Shiquan Liu
Summary: Transparent mesoporous silica microspheres were synthesized via sol-gel method followed by calcination, and exhibited enhanced fluorescence performance.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Applied
M. Barlog, H. Palkova, J. Bujdak
Summary: The focus of this study was on developing pigments based on layered nanomaterials with luminescent properties by modifying two layered silicates (montmorillonite and saponite) with cationic organic surfactants and a laser dye, which significantly increased fluorescence intensity, especially for montmorillonite hybrids. Advanced statistical analysis was used to differentiate components in fluorescence spectra. By selecting suitable organic cation and dye components, pigments with high fluorescence and long wavelengths approaching the near-infrared region could be prepared.
Article
Chemistry, Applied
Yuhao Jin, Jing Wu, Dehua Hu, Kaina Zhang, Suimin Deng, Lina Yang, Yun Hao, Xiangfeng Wang, Yuan Liu, Hailing Liu, Mengxia Xie
Summary: A novel enzyme-free immunoassay based on nanotechnology and fluorescent dye has been developed for the accurate detection of the biomarker PCT in human serum. The immunoassay shows high sensitivity and selectivity, and has been successfully utilized for determining PCT levels in real serum samples.
Article
Chemistry, Physical
Soma Majumder, Somenath Chatterjee, Parita Basnet, Jaya Mukherjee
Summary: This study focuses on industrially-relevant photocatalysis using silver-zinc oxide nanocomposites to efficiently degrade high concentrations of Rhodamine 6G laser dye, achieving recyclability of the photocatalyst.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Chemical
Anjani R. K. Gollakota, Venkata Subbaiah Munagapati, Sneha Gautam, Jet-Chau Wen, Chi-Min Shu
Summary: A crystalline zeolite material AlPO-14 was synthesized using Taiwanese coal fly ash and showed potential for separating cationic dyestuff R 6G from aqueous streams. The zeolites demonstrated good adsorption capacity for the dye, especially at neutral pH, and could be easily regenerated for multiple reuse cycles in alkaline medium.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Optics
Mandana Sadat Hosseini, Elnaz Yazdani, Batool Sajad, Fariba Mehradnia
Summary: The study reveals that the coupling of random lasing and stimulated Raman scattering enables tunable random lasers, offering possibilities for manufacturing optical devices in the future. This coupling effect also aids in enhancing the efficiency and applications of Raman spectroscopy.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Physical
Anjani R. K. Gollakota, Venkata Subbaiah Munagapati, Krushna Prasad Shadangi, Guda Mallikarjuna Reddy, Jet-Chau Wen, Chi-Min Shu
Summary: The study involved the transformation of coal fly ash into zeolite (AlPO4-5) which showed potential for adsorption of dyes and metal ions in water treatment applications. The zeolite exhibited high adsorption capacities and good reusability during the adsorption process.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Sk Imadul Islam, Partha Pyne, Dipak Kumar Das, Shounak Mukherjee, Suman Chakrabarty, Rajib Kumar Mitra
Summary: Both electrostatic and hydrophobic interactions are important in ligand-surfactant binding, particularly for ionic surfactants. In this study, we investigated the interaction between the cationic dye R6G and anionic SDS, cationic CTAB, and nonionic Tx 100 surfactants using absorption and emission spectroscopy. We found that R6G forms dimeric aggregates at a premicellar concentration of SDS, while no such aggregates were formed with CTAB and Tx 100. Two-photon absorption spectroscopy revealed that the change in dipole moment (Delta mu) of R6G reached a maximum at half the critical micelle concentration of SDS, supporting earlier quantum mechanical calculations. Additionally, we observed that the carbon chain length of the anionic surfactant affected the magnitude of Delta mu.
Article
Chemistry, Physical
Chomponoot Suppaso, Nipaporn Pongkan, Sonchai Intachai, Makoto Ogawa, Nithima Khaorapapong
Summary: NiFe layered double hydroxides were prepared by co-precipitation from nickel(II) nitrate hexahydrate and iron (III) nitrate nonahydrate within a specific pH range, showing co-existence with beta-Ni(OH)2 and gamma-Fe2O3 and high adsorption capacities. Among them, the sample prepared at pH 11 exhibited the best photocatalytic degradation for Congo Red and Rhodamine 6G under visible light irradiation, with high specific surface area and magnetic property for easy collection and reuse.
APPLIED CLAY SCIENCE
(2021)
Article
Engineering, Environmental
Akshatha Chandrashekar, Siji Vargheese, Jyothy G. Vijayan, Jineesh Ayippadath Gopi, T. Niranjana Prabhu
Summary: In this study, biobased polyurethane nanocellulose nanocomposites were synthesized using cottonseed oil as the biopolyol source and used for the adsorption of Rhodamine B dye from water. Low functional polyol was derived from cottonseed oil using a one-pot synthesis method, while nanocellulose was derived from pineapple leaves and surface-functionalized via silylation. The silylated nanocellulose was incorporated into the polyurethane matrix using in-situ polymerization. The prepared composite showed a high adsorption efficiency for Rhodamine B.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Polymer Science
Madhavi Nandimath, Rajashekhar F. Bhajantri, Jagadish Naik
Summary: This study reports the successful fabrication of highly flexible, reversibly stretchable, and transparent Rh6G/PVA polymer composite films with excellent optoelectronic properties by adding different amounts of Rh6G dye. FTIR studies reveal an interaction between PVA matrix and added Rh6G dye, while DSC thermograms show an increase in T(g) with the increase in dye amount. The developed films show appreciable optical and RTPL properties, making them suitable for application in OLED with enhanced RTPL studies.
Article
Chemistry, Physical
Chenyu Lin, Sai Krishna Katla, Juan Perez-Mercader
Summary: Our study demonstrates the efficient photocatalytic behavior of R6G dye in the RAFT-polymerization in water, leading to the formation of polymeric objects through self-assembly processes. The results highlight the supramolecular relationship between R6G molecules, their fluorescence emission, and their function as a PET photocatalyst.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Instruments & Instrumentation
Benjamin R. Anderson, Natalie Gese, Ray Gunawidjaja, Hergen Eilers
APPLIED SPECTROSCOPY
(2020)
Article
Physics, Applied
Benjamin R. Anderson, Ray Gunawidjaja, Hergen Eilers
JOURNAL OF APPLIED PHYSICS
(2020)
Article
Optics
Benjamin R. Anderson, Hergen Eilers
Article
Optics
Benjamin R. Anderson, Ray Gunawidjaja, Natalie Gese, Hergen Eilers
APPLIED PHYSICS B-LASERS AND OPTICS
(2020)
Article
Physics, Applied
Benjamin R. Anderson, Natalie Gese, Hergen Eilers
Summary: This study investigates the effects of different experimental parameters on a technique called wavefront-shaping-assisted bidirectional focusing in opaque media. The results show that target depth and sample/objective spacings have the most significant impact on the performance of the bidirectional focusing microscope. The signal-to-noise ratio (SNR) is only significant for small values, and the enhancement depends strongly on the incident beams' spot sizes.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Optics
Benjamin R. Anderson, Natalie Gese, Hergen Eilers
Summary: We have developed a bidirectional focusing microscope that utilizes feedback-assisted wavefront shaping to focus light inside a heterogenous material in order to monitor subsurface chemical reactions. The bidirectional geometry provides superior intensity enhancement and the microscope demonstrates its capability to measure sub-surface chemical reactions using fluorescence and Raman spectroscopy.
Article
Optics
Benjamin R. Anderson, Natalie Gese, Hergen Eilers
Summary: In this study, we propose the use of the lanthanide complex Eu:Y(acac)(3)(DPEPO) as an inert analogue for explosive molecular crystals in subsurface spectroscopy. We characterized the material and spectroscopic properties of this complex and investigated the effects of thermal and photo-degradation on its spectroscopic properties. These measurements will serve as baseline results for future studies on reactions involving this complex embedded within heterogeneous materials.
JOURNAL OF LUMINESCENCE
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Benjamin R. Anderson, Natalie J. Gese, Michael Mark, Ray Gunawidjaja, Hergen Eilers
SHOCK COMPRESSION OF CONDENSED MATTER - 2019
(2020)
Article
Chemistry, Physical
Benjamin R. Anderson, Mark G. Kuzyk
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Article
Multidisciplinary Sciences
Benjamin R. Anderson, Hergen Eilers
SN APPLIED SCIENCES
(2019)
