Results 51 to 60 of about 5,164 (236)

Single-Molecule Fluorescence Observed with Mercury Lamp Illumination

BioTechniques, 1999
We demonstrate that it is possible to observe single fluorescent molecules using a standard fluorescence microscope with mercury lamp excitation and an inexpensive cooled charge-coupled device (CCD) camera.
M. Unger, E. Kartalov, C.-S. Chiu, H.A. Lester, S.R. Quake   +4 more
doaj   +1 more source

Time-Resolved and Temperature Tuneable Measurements of Fluorescent Intensity using a Smartphone Fluorimeter [PDF]

Analyst 2017, 2017
A smartphone fluorimeter capable of time-based fluorescence intensity measurements at various temperatures is reported. Excitation is provided by an integrated UV LED (370 nm) and detection obtained using the in-built CMOS camera. A Peltier is integrated to allow measurements of the intensity over T = 10 to 40 C with a maximum temperature resolution of
arxiv   +1 more source

Roulette‐Inspired Physical Unclonable Functions: Stochastic yet Deterministic Multi‐Bit Patterning through the Solutal Marangoni Effect

Advanced Functional Materials, EarlyView.
Geometric multi‐bit patterning based on dynamic wetting and dewetting phenomena creates roulette‐like Physical Unclonable Function (PUF) labels with stochastic yet deterministic properties. This method leverages the solutal‐Marangoni effect for high randomness while achieving deterministic multinary patterns through polygonal confinement of binary ...
Yeongin Cho, Jeongsu Pyeon, Hanhwi Jang, Gwangsik Mun, Jaimin Kang, Byong‐Guk Park, Geon Yeong Kim, Hyoungsoo Kim, Yeon Sik Jung   +8 more
wiley   +1 more source

A Simplified Hollow-Core Photonic Crystal Fiber SERS Probe with a Fully Filled Photoreduction Silver Nanoprism

Sensors, 2018
In this paper, a simplified hollow-core photonic crystal fiber surface-enhanced Raman scattering (SERS) probe is presented. Silver nanoprisms are grown with a photoreduction method and account for the SERS, which have better electromagnetic enhancement ...
Youfu Geng, Yiwen Xu, Xiaoling Tan, Lina Wang, Xuejin Li, Yu Du, Xueming Hong   +6 more
doaj   +1 more source

Fluorescence behaviour of highly concentrated rhodamine 6G solutions [PDF]

Journal of Luminescence, 1987
The fluorescence quantum distributions E(X) and fluorescence quantum efficiencies qF of rhodamine 6G in methanol and in water are measured for various concentrations up to the solubility limit. The fluorescence spectra are separated in monomer and dimer (ground-state dimer and closely spaced pair) contributions.
Penzkofer, Alfons, Leupacher, W.
openaire   +3 more sources

Cell Membrane Vesicle Camouflaged Artificial Cells

Advanced Functional Materials, EarlyView.
Artificial cells camouflaged with a cell membrane vesicle coating are able to assemble into synthetic aggregates that exhibit rudimentary communication capabilities. Additionally, when these artificial cells are equipped with antioxidant capabilities, they are able to protect the intracellular homeostasis in HepG2 cells present in semi‐synthetic ...
Paula De Dios Andres, Stefan Pendlmayr, Noga Gal, Cathrine Abild Meyer, Cecilie Ryberg, Olav Vestrheim, Noel Angelo Kalacas, Fatih Demir, Markus M. Rinschen, Karsten Haupt, Rajeshwar Prosad Mookerjee, Brigitte Städler   +11 more
wiley   +1 more source

Baicalin attenuated metabolic dysfunction‐associated fatty liver disease by suppressing oxidative stress and inflammation via the p62–Keap1–Nrf2 signalling pathway in db/db mice

Phytotherapy Research, EarlyView., 2023
Abstract Metabolic dysfunction‐associated fatty liver disease (MAFLD) is the main cause of chronic liver disease. Baicalin (Bai), a bioactive molecule found in Scutellaria baicalensis Georgi, possesses antioxidant and antiinflammatory properties. These activities suggest Bai could be a promising therapeutic agent against NAFLD; however, its specific ...
Wen‐Jing Liu, Wei‐Wen Chen, Jia‐Ying Chen, Yi‐Bin Sun, Dennis Chang, Chen‐Xiang Wang, Jin‐Dong Xie, Wei Lin, Shao‐Hua Li, Wen Xu, Yan‐Xiang Lin, Yan‐Fang Zheng, Xian Zhou, Ming‐Qing Huang   +13 more
wiley   +1 more source

Linear and Nonlinear optical properties of Rhodamine 6G

IOP Conference Series: Materials Science and Engineering, 2020
Abstract In this study, the linear and nonlinear optical properties of laser dye R6G in methanol solvent were investigated with various concentrations (1×10−4, 5×10−4, 1×10−5, 1×10−6 and 5×10−6 mole/liter) at thickness (1mm). To study the non-linear optical properties like refractive index and absorption coefficient (β) Z-Scan technique ...
Rajaa A. Madlol, Firas K. Mohamad Alosfur, Noor J. Ridha, H. H. Obeed, Khawla J. Tahir   +4 more
openaire   +2 more sources

A Coupled Cavity Micro Fluidic Dye Ring Laser [PDF]

Microelectronic Engineering vol. 78-79, 185 (2005), 2004
We present a laterally emitting, coupled cavity micro fluidic dye ring laser, suitable for integration into lab-on-a-chip micro systems. The micro-fluidic laser has been successfully designed, fabricated, characterized and modelled. The resonator is formed by a micro-fluidic channel bounded by two isosceles triangle mirrors.
arxiv   +1 more source

Au@h‐BN Core–Shell Nanostructure as Advanced Shell‐Isolated Nanoparticles for In Situ Electrochemical Raman Spectroscopy in Alkaline Environments

Advanced Functional Materials, EarlyView.
This study demonstrates the stability and Raman signal enhancement effects of Au@h‐BN nanoparticles in an alkaline electrolyte on. A comparison between conventional SiO2 and h‐BN shells reveals that the h‐BN core‐shell structure provides superior stability and enhanced Raman intensity over multiple cyclic voltammetry cycles.
Jee Hyeon Kim, Jihyun Ra, Younghee Park, Junyeon Yoon, Eunji Lee, Hyunseob Lim   +5 more
wiley   +1 more source