scholarly journals A random laser based on electrospun polymeric composite nanofibers with dual-size distribution

2019 ◽  
Vol 1 (2) ◽  
pp. 728-734 ◽  
Author(s):  
Mário César Albuquerque de Oliveira ◽  
Leonardo de Souza Menezes ◽  
Pablo I. R. Pincheira ◽  
Carlos Rojas-Ulloa ◽  
Nikifor Rakov Gomez ◽  
...  
Keyword(s):  
Composite Nanofibers ◽  
Electrospun Fiber ◽  
Polymeric Composite ◽  
Essential Elements ◽  
Random Laser ◽  
Flexible Systems ◽  
Broad Distribution ◽  
Environment Friendly ◽  
Random Lasers ◽  
Lasing Mechanism

Electrospun fiber-based random lasers are environment-friendly flexible systems in which waveguiding/scattering processes provided by their structure with a broad distribution of diameters are essential elements to generate a suitable lasing mechanism.

A Study on Proposal of Environmental Assessment Method in Materials and Resource Category of Korea Green Building Certification

2014 ◽  
Vol 1025-1026 ◽  
pp. 1160-1163 ◽  
Author(s):  
Yu Ri Gong ◽  
Sung Ho Tae ◽  
Seung Jun Roh
Keyword(s):  
Building Materials ◽  
Green Building ◽  
The United States ◽  
Assessment Method ◽  
Essential Elements ◽  
Assessment Process ◽  
Environment Friendly ◽  
The United Kingdom ◽  
Environment Assessment ◽  
Assessment Guidelines

The purpose of this study is to propose a method of environment assessment in the field of building materials within Korea Green Building Certification (G-SEED). The method of environment assessment in the field of building materials was examined using LEED of the United States and BREEAM of the United Kingdom, the representative environment-friendly building certification systems in other countries. Especially, each revision of BREEAM was investigated for assessment methods such as environment assessment guidelines and assessment programs. In addition, assessment process and items were analyzed in relation to BREEAM. As a result, for environment assessment in the field of building materials within G-SEED, the method of connecting essential elements such as building material assessment guidelines and database networks with G-SEED was proposed.

A curvature-tunable random laser

Nanoscale ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 3534-3545 ◽  
Author(s):  
Ya-Ju Lee ◽  
Ting-Wei Yeh ◽  
Zu-Po Yang ◽  
Yung-Chi Yao ◽  
Chen-Yu Chang ◽  
...  
Keyword(s):  
Free Path ◽  
Mean Free Path ◽  
Random Laser ◽  
Experimental Demonstration ◽  
Random Lasers

We report the first experimental demonstration of curvature-tunable random lasers to control the transport mean free path of emitted photons.

scholarly journals Optimization of Process‐Control Parameters for the Diameter of Electrospun Hydrophilic Polymeric Composite Nanofibers

2021 ◽  
Vol 306 (12) ◽  
pp. 2170049
Author(s):  
Fawzan S. Alfares ◽  
Ece Guler ◽  
Hussain Alenezi ◽  
Muhammet Emin Cam ◽  
Mohan Edirisinghe
Keyword(s):  
Process Control ◽  
Composite Nanofibers ◽  
Polymeric Composite ◽  
Control Parameters

Flexible random lasers with tunable lasing emissions

Nanoscale ◽  
2018 ◽  
Vol 10 (22) ◽  
pp. 10403-10411 ◽  
Author(s):  
Ya-Ju Lee ◽  
Chun-Yang Chou ◽  
Zu-Po Yang ◽  
Thi Bich Hanh Nguyen ◽  
Yung-Chi Yao ◽  
...  
Keyword(s):  
Polyethylene Terephthalate ◽  
Random Laser ◽  
Random Lasers ◽  
High Degree ◽  
Pet Substrate

In this study, we experimentally demonstrated a flexible random laser fabricated on a polyethylene terephthalate (PET) substrate with a high degree of tunability in lasing emissions.

scholarly journals Flexible Random Laser Using Silver Nanoflowers

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 619 ◽  
Author(s):  
Junhua Tong ◽  
Songtao Li ◽  
Chao Chen ◽  
Yulan Fu ◽  
Fengzhao Cao ◽  
...  
Keyword(s):  
High Efficiency ◽  
Flexible Substrate ◽  
Field Enhancement ◽  
Random Laser ◽  
Lasing Wavelength ◽  
Random Lasers ◽  
Phase Synthesis ◽  
Polymer Waveguide ◽  
Solution Phase Synthesis ◽  
Low Threshold

A random laser was achieved in a polymer membrane with silver nanoflowers on a flexible substrate. The strong confinement of the polymer waveguide and the localized field enhancement of silver nanoflowers were essential for the low-threshold random lasing action. The lasing wavelength can be tuned by bending the flexible substrate. The solution phase synthesis of the silver nanoflowers enables easy realization of this type of random lasers. The flexible and high-efficiency random lasers provide favorable factors for the development of imaging and sensing devices.

Electrospun Composite Nanofibers for Sensor Applications

2009 ◽  
Vol 1240 ◽  
Author(s):  
Li Han ◽  
Anthony Andrady ◽  
Kim Guzan ◽  
David S Ensor
Keyword(s):  
Composite Nanofibers ◽  
Electrospun Fiber ◽  
Chemical Vapor ◽  
Carbon Composite ◽  
Vapor Concentration ◽  
Integrated Sensor ◽  
Sensor Applications ◽  
Sensing Material ◽  
Polymer Nanofiber ◽  
Sensitivity And Selectivity

AbstractElectrospun polymer nanofiber materials have attracted tremendous interest in sensor applications as their effective sensing surface area dramatically increases with decreasing fiber diameter. The highly tunable polymer composite chemistry and surface functionality of the nanofiber material provides a wide platform for exploring different applications, such as filtration media, sound isolation materials, and sensor components. This paper presents a nanofiber sensor platform device composed of electrospun polymer/carbon composite nanofibers combined with electrodes directly printed onto the surface of the electrospun fiber mat. This structure forms an integrated sensor system for detecting various chemical vapors including volatile organic compounds (VOCs) and oxidative gases. In this sensor, the composite polymer nanofibers form a chemo-resistor sensing material, and the conductivity of these composite sensing materials varies with chemical vapor exposure. The sensor performance exhibits very stable baselines with dramatically reduced noise levels compared to conventional interdigitated electrodes. Furthermore, the sensor response to different vapors shows a linear relationship between conductivity change and vapor concentration in the range of ppb – ppm for some analytes, including methanol, chloroform and ozone. The sensitivity and selectivity of these sensors to different vapor analytes will also be discussed.

scholarly journals A particle suspension model for nanosuspensions electrospinning

2018 ◽  
Vol 22 (4) ◽  
pp. 1707-1714
Author(s):  
Lan Xu
Keyword(s):  
Composite Nanofibers ◽  
Polymeric Composite ◽  
Electrospinning Process ◽  
Particle Suspension ◽  
Physical Understanding ◽  
Complex Process ◽  
Polymeric Solutions ◽  
Suspension Model ◽  
Multi Phase ◽  
Insight Into

Polymeric composite nanofibers have been fabricated simply by the electrospinning of polymeric solutions containing a wide variety of suspended inclusions such as nanoparticles and nanotubes. The electrospinning process for fabrication of composite nanofibers is a multi-phase and multi-physics process. In this paper, a modified particle suspension model for electrospinning nanosuspensions is established to research the electrospinning process. The model can offer in-depth insight into physical understanding of the complex process which can not be fully explained experimentally.

scholarly journals Nanoparticle-doped electrospun fiber random lasers with spatially extended light modes

2017 ◽  
Vol 25 (20) ◽  
pp. 24604 ◽  
Author(s):  
Vincenzo Resta ◽  
Andrea Camposeo ◽  
Martina Montinaro ◽  
Maria Moffa ◽  
Karolis Kazlauskas ◽  
...  
Keyword(s):  
Electrospun Fiber ◽  
Random Lasers ◽  
Spatially Extended

scholarly journals Random Lasers: Multicolor Ultralow-Threshold Random Laser Assisted by Vertical-Graphene Network (Advanced Optical Materials 16/2018)

2018 ◽  
Vol 6 (16) ◽  
pp. 1870063
Author(s):  
Pradip Kumar Roy ◽  
Golam Haider ◽  
Hung-I Lin ◽  
Yu-Ming Liao ◽  
Cheng-Hsin Lu ◽  
...  
Keyword(s):  
Optical Materials ◽  
Random Laser ◽  
Random Lasers

Fabrication of Polymeric Composite Nanostructures Containing Ferritin Nanoparticles and Carbon Nanotubes

2006 ◽  
Vol 921 ◽  
Author(s):  
Min Kyoon Shin ◽  
Sang Jun Park ◽  
Seong Gil Yoon ◽  
Chang Kee Lee ◽  
Kwang Min Shin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Elastic Modulus ◽  
Physical Properties ◽  
Composite Nanofibers ◽  
Polymeric Composite ◽  
Artificial Muscles ◽  
Multiwalled Carbon ◽  
Excess Carbon ◽  
Polymeric Nanofibers

AbstractComposite nanofibers including ferritin nanoparticles or multiwalled carbon nanotubes (MWCNTs) were fabricated to enhance the physical properties of the nanofibers, such as the elastic modulus and electrical conductivity. The ferritin was homogeneously incorporated in the polymeric nanofibers, but excess carbon nanotubes (CNTs) added to the polymer solution resulted in the fabrication of composite nanofibers with rough surfaces. PVA/ferritin/CNT composite nanofibers were fabricated that had smooth surfaces, and had a good dispersion of ferritin and CNTs. These composite nanofibers are applicable to artificial muscles requiring enhanced physical properties.

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