scholarly journals Flexible Distributed Bragg Refractors: Cost-Effective, Flexible, Hydrophobic, and Tunable Structural Color Polymeric Bragg Reflector Metastructures (Advanced Optical Materials 21/2018)

2018 ◽  
Vol 6 (21) ◽  
pp. 1870082 ◽  
Author(s):  
Pedro M. Resende ◽  
Ruy Sanz ◽  
Olga Caballero-Calero ◽  
Marisol Martín-González
Keyword(s):  
Optical Materials ◽  
Cost Effective ◽  
Bragg Reflector ◽  
Structural Color

Cost-Effective, Flexible, Hydrophobic, and Tunable Structural Color Polymeric Bragg Reflector Metastructures

2018 ◽  
Vol 6 (21) ◽  
pp. 1800408 ◽  
Author(s):  
Pedro M. Resende ◽  
Ruy Sanz ◽  
Olga Caballero-Calero ◽  
Marisol Martín-González
Keyword(s):  
Cost Effective ◽  
Bragg Reflector ◽  
Structural Color

scholarly journals Optical Properties of the Self-Assembling Polymeric Colloidal Systems

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Alexandra Mocanu ◽  
Edina Rusen ◽  
Aurel Diacon
Keyword(s):  
Optical Fibers ◽  
Optical Materials ◽  
Polymeric Materials ◽  
Cost Effective ◽  
Emerging Technology ◽  
Medical Applications ◽  
Colloidal Systems ◽  
Self Assembling ◽  
Intensity Control ◽  
Polymeric Optical Fibers

In the last decade, optical materials have gained much interest due to the high number of possible applications involving path or intensity control and filtering of light. The continuous emerging technology in the field of electrooptical devices or medical applications allowed the development of new innovative cost effective processes to obtain optical materials suited for future applications such as hybrid/polymeric solar cells, lasers, polymeric optical fibers, and chemo- and biosensing devices. Considering the above, the aim of this review is to present recent studies in the field of photonic crystals involving the use of polymeric materials.

scholarly journals Genetic manipulation of structural color in bacterial colonies

2018 ◽  
Vol 115 (11) ◽  
pp. 2652-2657 ◽  
Author(s):  
Villads Egede Johansen ◽  
Laura Catón ◽  
Raditijo Hamidjaja ◽  
Els Oosterink ◽  
Bodo D. Wilts ◽  
...  
Keyword(s):  
Cell Shape ◽  
Optical Materials ◽  
Genetic Manipulation ◽  
Stringent Response ◽  
Gliding Motility ◽  
Structural Color ◽  
Trna Modification ◽  
Naturally Occurring ◽  
Genetic Modifications ◽  
Living Organisms

Naturally occurring photonic structures are responsible for the bright and vivid coloration in a large variety of living organisms. Despite efforts to understand their biological functions, development, and complex optical response, little is known of the underlying genes involved in the development of these nanostructures in any domain of life. Here, we used Flavobacterium colonies as a model system to demonstrate that genes responsible for gliding motility, cell shape, the stringent response, and tRNA modification contribute to the optical appearance of the colony. By structural and optical analysis, we obtained a detailed correlation of how genetic modifications alter structural color in bacterial colonies. Understanding of genotype and phenotype relations in this system opens the way to genetic engineering of on-demand living optical materials, for use as paints and living sensors.

Biosilica slab photonic crystals as an alternative to cleanroom nanofabrication?

2020 ◽  
Vol 223 ◽  
pp. 261-277
Author(s):  
Johannes W. Goessling ◽  
Ana A. Santiago González ◽  
Vijaya Shanthi Paul Raj ◽  
Matt P. Ashworth ◽  
Schonna R. Manning ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Optical Materials ◽  
Environmentally Friendly ◽  
Cost Effective

We propose that optical materials produced by diatoms could serve as cost-effective and environmentally friendly alternatives to cleanroom nanofabrication.

scholarly journals 3D-Printed Quasi-Cylindrical Bragg Reflector to Boost the Gain and Directivity of cm- and mm-Wave Antennas

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 8014
Author(s):  
Jéssica A. P. Ribeiro ◽  
Hugo R. D. Filgueiras ◽  
Arismar Cerqueira Sodré ◽  
Felipe Beltrán-Mejía ◽  
Jorge Ricardo Mejía-Salazar
Keyword(s):  
3D Printing ◽  
Radiation Pattern ◽  
Cost Effective ◽  
Bragg Reflector ◽  
Antenna Design ◽  
Bragg Structure ◽  
High Reflectivity ◽  
Large Enhancement ◽  
3D Printed ◽  
Directive Antenna

We demonstrate a concept for a large enhancement of the directivity and gain of readily available cm- and mm-wave antennas, i.e., without altering any property of the antenna design. Our concept exploits the high reflectivity of a Bragg reflector composed of three bilayers made of transparent materials. The cavity has a triangular aperture in order to resemble the idea of a horn-like, highly directive antenna. Importantly, we report gain enhancements of more than 400% in relation to the gain of the antenna without the Bragg structure, accompanied by a highly directive radiation pattern. The proposed structure is cost-effective and easy to fabricate with 3D-printing. Our results are presented for frequencies within the conventional WiFi frequencies, based on IEEE802.11 standards, thus, enabling easily implementation by non-experts and needing only to be placed around the antenna to improve the directivity and gain of the signal.

scholarly journals Design and fabrication of recombinant reflectin-based Bragg reflectors: bio-design engineering and photoisomerism induced wavelength modulation

2020 ◽  
Author(s):  
Emmanuel Wolde-Michael ◽  
Aled D Roberts ◽  
Derren J Heyes ◽  
Ahu G Dumanli ◽  
Jonny J Blaker ◽  
...  
Keyword(s):  
Optical Properties ◽  
Material Properties ◽  
Optical Materials ◽  
Single Layer ◽  
Bragg Reflector ◽  
Bragg Reflectors ◽  
Wavelength Modulation ◽  
New Class ◽  
Novel Method ◽  
Dermal Cells

ABSTRACTThe remarkable camouflage capabilities of cephalopods have inspired many to develop dynamic optical materials which exploit certain design principles and/or material properties from cephalopod dermal cells. Here, the angle-dependent optical properties of various single-layer reflectin thin-films are characterized within the UV-Vis-NIR regions. Following this, the design and fabrication of the first bio-inspired reflectin-based Bragg reflector is described, which was found to conserve the optical properties of single layer films but exhibit a unique characteristic; reduced angle-dependent reflectivity. Finally, a novel method of controlling reflectin thin-film optical properties is introduced; visible light-induced photoisomerism, representing a new class of reflectin-based optical materials.

scholarly journals Photoresponsive Liquid Crystals: Photoresponsive Structural Color in Liquid Crystalline Materials (Advanced Optical Materials 16/2019)

2019 ◽  
Vol 7 (16) ◽  
pp. 1970060
Author(s):  
Michael E. McConney ◽  
Mariacristina Rumi ◽  
Nicholas P. Godman ◽  
Urice N. Tohgha ◽  
Timothy J. Bunning
Keyword(s):  
Liquid Crystals ◽  
Optical Materials ◽  
Liquid Crystalline ◽  
Structural Color ◽  
Crystalline Materials ◽  
Liquid Crystalline Materials

The application of electron microscopy to diagnosis in gynecologic neoplasms and tumor-like conditions

1984 ◽  
Vol 42 ◽  
pp. 102-105
Author(s):  
Lawrence M. Roth
Keyword(s):  
Electron Microscopy ◽  
Reproductive Tract ◽  
Malignant Tumors ◽  
Frozen Section ◽  
Cost Effective ◽  
Female Reproductive Tract ◽  
Ultrastructural Examination ◽  
Specific Diagnosis ◽  
Potential Value ◽  
Gynecologic Neoplasms

The female reproductive tract may be the site of a wide variety of benign and malignant tumors, as well as non-neoplastic tumor-like conditions, most of which can be diagnosed by light microscopic examination including special stains and more recently immunoperoxidase techniques. Nevertheless there are situations where ultrastructural examination can contribute substantially to an accurate and specific diagnosis. It is my opinion that electron microscopy can be of greatest benefit and is most cost effective when applied in conjunction with other methodologies. Thus, I have developed an approach which has proved useful for me and may have benefit for others. In cases where it is deemed of potential value, glutaraldehyde-fixed material is obtained at the time of frozen section or otherwise at operation. Coordination with the gynecologic oncologist is required in the latter situation. This material is processed and blocked and is available if a future need arises.

The IBM-PC in electron microscopy

1996 ◽  
Vol 54 ◽  
pp. 612-613
Author(s):  
James F. Mancuso
Keyword(s):  
Head Start ◽  
Image Acquisition ◽  
Cost Effective ◽  
Financial Applications ◽  
Number Of Factors ◽  
Instrument Control ◽  
The Cost ◽  
Training And Support ◽  
Control Image ◽  
Ibm Pc

IBM PC compatible computers are widely used in microscopy for applications ranging from control to image acquisition and analysis. The choice of IBM-PC based systems over competing computer platforms can be based on technical merit alone or on a number of factors relating to economics, availability of peripherals, management dictum, or simple personal preference.IBM-PC got a strong “head start” by first dominating clerical, document processing and financial applications. The use of these computers spilled into the laboratory where the DOS based IBM-PC replaced mini-computers. Compared to minicomputer, the PC provided a more for cost-effective platform for applications in numerical analysis, engineering and design, instrument control, image acquisition and image processing. In addition, the sitewide use of a common PC platform could reduce the cost of training and support services relative to cases where many different computer platforms were used. This could be especially true for the microscopists who must use computers in both the laboratory and the office.

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