A graphene oxide-based fluorescent sensor for surfactants

2019 ◽  
Vol 11 (45) ◽  
pp. 5826-5832
Author(s):  
Govindaraj Usha ◽  
Ramesh Prakash ◽  
Karuppasamy Karpagalakshmi ◽  
Sundaram Ramalakshmi ◽  
Lakshminarayanan Piramuthu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Light Source ◽  
Rhodamine B ◽  
Visual Detection ◽  
Detection Method ◽  
Fluorescent Sensor ◽  
Uv Light ◽  
Low Cost

A facile and low-cost detection method for the surfactants of ionic and non-ionic types was successfully demonstrated using rhodamine B-decorated graphene oxide, which also helped the visual detection of surfactants under a UV light source.

scholarly journals Synthesis and Characterization of Hierarchical Porousα-FeOOH for the Adsorption and Photodegradation of Rhodamine B

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Jianliang Cao ◽  
Gaojie Li ◽  
Yan Wang ◽  
Guang Sun ◽  
Hari Bala ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Rhodamine B ◽  
Uv Light ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Hierarchical Porous ◽  
Templated Method

Hierarchical porousα-FeOOH nanoparticles were controlled and prepared via a facile polystyrene (PS) microspheres-templated method. Theα-Fe2O3was obtained by the calcination of the as-preparedα-FeOOH. The resulting nanoparticles were characterized by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and N2-sorption techniques. The adsorption and photodegradation of Rhodamine B performance were evaluated under UV light at room temperature. The results indicated that the photocatalytic activity of theα-FeOOH nanoparticles is superior toα-Fe2O3-200 andα-Fe2O3-300 due to the hierarchically multiporous structure and high surface area. This convenient and low-cost process provides a rational synthesis alternative for the preparation of multiporous materials and the as-synthesis products have great foreground applications in many aspects.

scholarly journals Low-cost photolithography system for cell biology labs

2021 ◽  
Vol 7 (2) ◽  
pp. 550-553
Author(s):  
Benjamin K. Naggay ◽  
Kerstin Frey ◽  
Markus Schneider ◽  
Kiriaki Athanasopulu ◽  
Günter Lorenz ◽  
...  
Keyword(s):  
Light Source ◽  
Cell Biology ◽  
Soft Lithography ◽  
Uv Light ◽  
Low Cost ◽  
Cost Effective ◽  
Working Environment ◽  
Light Emitting ◽  
Set Up ◽  
High Level

Abstract Soft lithography, a tool widely applied in biology and life sciences with numerous applications, uses the soft molding of photolithography-generated master structures by polymers. The central part of a photolithography set-up is a mask-aligner mostly based on a high-pressure mercury lamp as an ultraviolet (UV) light source. This type of light source requires a high level of maintenance and shows a decreasing intensity over its lifetime, influencing the lithography outcome. In this paper, we present a low-cost, bench-top photolithography tool based on ninety-eight 375 nm light-emitting diodes (LEDs). With approx. 10 W, our presented lithography set-up requires only a fraction of the energy of a conventional lamp, the LEDs have a guaranteed lifetime of 1000 h, which becomes noticeable by at least 2.5 to 15 times more exposure cycles compared to a standard light source and with costs less than 850 C it is very affordable. Such a set-up is not only attractive to small academic and industrial fabrication facilities who want to enable work with the technology of photolithography and cannot afford a conventional set-up, but also microfluidic teaching laboratories and microfluidic research and development laboratories, in general, could benefit from this cost-effective alternative. With our self-built photolithography system, we were able to produce structures from 6 μm to 50 μm in height and 10 μm to 200 μm in width. As an optional feature, we present a scaled-down laminar flow hood to enable a dust-free working environment for the photolithography process.

A carbon-dot-based dual-emission probe for ultrasensitive visual detection of copper ions

2018 ◽  
Vol 42 (24) ◽  
pp. 19771-19778 ◽  
Author(s):  
Yunsuo Kuang ◽  
Linfeng Chen ◽  
Jiahui Lu ◽  
Xike Tian ◽  
Chao Yang ◽  
...  
Keyword(s):  
Rhodamine B ◽  
Carbon Dots ◽  
Visual Detection ◽  
Copper Ions ◽  
Fluorescent Sensor ◽  
Dual Emission ◽  
Carbon Dot

In this work, we successfully developed an ultrasensitive dual-emission fluorescent sensor (CRB) for instant visual determination of Cu2+ by modifying a Cu-sensitive rhodamine B derivative (RB) onto photostable carboxyl modified carbon dots (CDs).

A low-cost low-maintenance ultraviolet lithography light source based on light-emitting diodes

Lab on a Chip ◽  
2015 ◽  
Vol 15 (1) ◽  
pp. 57-61 ◽  
Author(s):  
M. Erickstad ◽  
E. Gutierrez ◽  
A. Groisman
Keyword(s):  
Light Source ◽  
Light Emitting Diodes ◽  
Uv Light ◽  
Low Cost ◽  
Uniform Illumination ◽  
Large Area ◽  
Ultraviolet Lithography ◽  
Light Emitting

An LED-based UV-light source producing collimated uniform illumination over a large area is built and used to fabricate PDMS microchannels with near-rectangular profiles and depths up to 300 μm.

scholarly journals Brilliant Green Decorated Graphene Oxide for the Detection of Cucurbit[7]uril

2019 ◽  
Vol 9 (2S2) ◽  
pp. 227-231
Keyword(s):  
Graphene Oxide ◽  
High Selectivity ◽  
Brilliant Green ◽  
Detection Method ◽  
Low Cost ◽  
Binding Potential ◽  
Synthetic Receptors ◽  
Turn On ◽  
Vis Spectroscopy ◽  
Sensitive Sensor

Among the synthetic receptors, Cucurbiturils have gained much attention recent days due to their unique binding potential with variety of drugs and dyes. However, no facile detection method using UV-vis spectroscopy has been developed. Here, we have developed the brilliant green decorated graphene oxide (BGGO) for the detection of cucurbit[7]uril (CB[7]) with good selectivity and sensitivity. Thus, BGGO could able to detect the CB[7] and turn on the release of brilliant green quantitatively. Among the sensors for CB[7], BGGO is the low-cost and sensitive sensor for CB[7] with high selectivity

Development of a UV Light Source using Pr:LuAG Thin Film Target Pumped by Electron Beam

2015 ◽  
Vol 135 (9) ◽  
pp. 1049-1054
Author(s):  
Norio Ichikawa ◽  
Kohei Ikeda ◽  
Yoshinori Honda ◽  
Hiroyuki Taketomi ◽  
Koji Kawai ◽  
...  
Keyword(s):  
Thin Film ◽  
Electron Beam ◽  
Light Source ◽  
Uv Light

scholarly journals Photocatalytic reduction of graphene oxide with cuprous oxide film under UV-vis irradiation

2020 ◽  
Vol 59 (1) ◽  
pp. 207-214 ◽  
Author(s):  
Yao Wang ◽  
Jianqing Feng ◽  
Lihua Jin ◽  
Chengshan Li
Keyword(s):  
Graphene Oxide ◽  
Photoelectron Spectroscopy ◽  
Low Cost ◽  
Photocatalytic Reduction ◽  
Force Microscopy ◽  
Atomic Force ◽  
Reduced Graphene ◽  
Reduction Efficiency ◽  
Metal Organic ◽  
Reduction Effect

AbstractWe have grown Cu2O films by different routes including self-oxidation and metal-organic deposition (MOD). The reduction efficiency of Cu2O films on graphene oxide (GO) synthesized by modified Hummer’s method has been studied. Surface morphology and chemical state of as-prepared Cu2O film and GO sheets reduced at different conditions have also been investigated using atomic force microscopy (AFM) and x-ray photoelectron spectroscopy (XPS). Results show that self-oxidation Cu2O film is more effective on phtocatalytic reduction of GO than MOD-Cu2O film. Moreover, reduction effect of self-oxidation Cu2O film to GO is comparable to that of environmental-friendly reducing agent of vitamin C. The present results offer a potentially eco-friendly and low-cost approach for the manufacture of reduced graphene oxide (RGO) by photocatalytic reduction.

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