scholarly journals Using plasmons to harness infrared solar light

2021 ◽  
Vol 10 (1) ◽  
pp. 118-121
Author(s):  
Luis A. Pérez ◽  
Jinhui Hu ◽  
M. Isabel Alonso ◽  
Alejandro R. Goñi

Using plasmons to harness infrared solar light The PLASMIONICO project aims to advance the sustainable production of electricity by harnessing infrared (IR) solar light, which is typically wasted in conventional solar cells. The key concept is to allow IR light to be absorbed at nanostructured metal cathodes to launch surface plasmons (rapid oscillations of electronic charge analogous to sound waves in liquids) to generate a photocurrent. Our strategy uses inverted silicon pyramid arrays covered with thin gold films, manufactured employing low-cost and scalable methods. After optimising the infrared absorption performance, we are set to improve photocurrent delivery with promising results.

Nanomaterials ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 76
Author(s):  
Thanh-Lieu Thi Le ◽  
Lam Tan Nguyen ◽  
Hoai-Hue Nguyen ◽  
Nguyen Van Nghia ◽  
Nguyen Minh Vuong ◽  
...  

Nanostructures of titanium nitride (TiN) have recently been considered as a new class of plasmonic materials that have been utilized in many solar energy applications. This work presents the synthesis of a novel nanostructure of TiN that has a nanodonut shape from natural ilmenite ore using a low-cost and bulk method. The TiN nanodonuts exhibit strong and spectrally broad localized surface plasmon resonance absorption in the visible region centered at 560 nm, which is well suited for thermoplasmonic applications as a nanoscale heat source. The heat generation is investigated by water evaporation experiments under simulated solar light, demonstrating excellent solar light harvesting performance of the nanodonut structure.


Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2636
Author(s):  
Fenghui Cao ◽  
Jia Xu ◽  
Xinci Zhang ◽  
Bei Li ◽  
Xiao Zhang ◽  
...  

We developed a simple method to fabricate SiO2-sphere-supported N-doped CNTs (NCNTs) for electromagnetic wave (EMW) absorption. EMW absorption was tuned by adsorption of the organic agent on the precursor of the catalysts. The experimental results show that the conductivity loss and polarization loss of the sample are improved. Meanwhile, the impedance matching characteristics can also be adjusted. When the matching thickness was only 1.5 mm, the optimal 3D structure shows excellent EMW absorption performance, which is better than most magnetic carbon matrix composites. Our current approach opens up an effective way to develop low-cost, high-performance EMW absorbers.


2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
S Agarwal ◽  
S Verma ◽  
N Verma ◽  
K Kothiwal

Abstract Issue There is a need for adaptable/scalable methods to understand environmental determinants of health and well-being in slums of LMIC cities. Catalysing grassroots actions to reduce health inequalities is needed with strong community leadership in slums. Methods Conducted in 2016-2017 in Indore (3 m population), India this practice undertakes qualitative health assessments using simple, actionable indicators with community knowledge and prioritizes solutions. Participatory neighbourhood level assessment of sewerage, toilets, garbage disposal and water supply by slum women was done using three colour scale: red for poor condition, yellow for moderate condition and green for good condition across 24 slums. Since slum women live these challenges daily, they can assess conditions. A qualitative adaptation of WHO's Urban HEART, this practice seeks to learn how slum women assess conditions, implement actions for improvement of slum environment. Results Context responsive actions included submitting community petitions and reminders to Municipal authorities by slum women to repair sewerage lines, construct toilets, increase regularity of garbage collection and improve public water supply in slums. Of 24 slums assessed in 2016, 6 were designated as “red”, 14 as “yellow” and 4 as “green” on condition of toilets and sewerage. On garbage disposal and water supply, 8 slums were designated as “red”, 10 as “yellow” and 6 as “green”. With coordination with Municipal authorities in 2017, slums on “red” reduced to 3 in each group, those assessed as “green” increased to 10 with improved conditions. Lessons This approach helps slum communities to assess problems and implement solutions. The methodology is simple, low-cost, easily understood by less educated, academics, policy makers and uses community wisdom. It is adaptable for NGOs, relevant policies/guidelines in LMIC cities. This collective community health assessment directly catalyses demand side action. Key messages Collective efficacy is a group’s shared belief in its ability to utilize information, pursue actions to overcome obstacles accomplishing a valued goal. This method is key to replicate this practice. People’s efforts to bring public services to the slums through collective action can reduce urban health inequality.


2019 ◽  
Vol 7 (18) ◽  
pp. 2948-2953 ◽  
Author(s):  
Qianhao Pan ◽  
Shiming Zhang ◽  
Ruiting Li ◽  
Yonglin He ◽  
Yapei Wang

In this work, a simple, low-cost, and applicable strategy for preparing membranes which allow photothermal conversion and have excellent anti-bacterial ability is proposed.


2007 ◽  
Vol 40 (18) ◽  
pp. 5675-5682 ◽  
Author(s):  
A I Maaroof ◽  
A Gentle ◽  
G B Smith ◽  
M B Cortie

Plasmonics ◽  
2015 ◽  
Vol 11 (2) ◽  
pp. 557-563 ◽  
Author(s):  
S. P. Rudenko ◽  
L. S. Maksimenko ◽  
I. E. Matyash ◽  
O. M. Mischuk ◽  
M. O. Stetsenko ◽  
...  

2013 ◽  
Vol 14 (4) ◽  
pp. 586-589 ◽  
Author(s):  
GA Raviraj ◽  
DD Darshan ◽  
Girish Katti ◽  
NS Manikantan ◽  
AD Manoj Kumar ◽  
...  

ABSTRACT Objective The purpose of this electronic search study was to evaluate the diagnostic efficacy of ultrasonography in cysts and tumors of maxillofacial region. Materials and methods An electronic search was performed for articles published from January 1989 to august 2009. Results Only 30 publications were searched and 22 publications showed high level of evidence (4 review articles, 12 clinical studies, 2 case reports, 1 quantitative analysis, 2 research articles and 1 preliminary report) with total of more than 2000 patients. Conclusion Ultrasonography is a noninvasive, low cost procedure, and recommended as a complimentary imaging modality. How to cite this article Darshan DD, Katti G, Raviraj GA, Manikantan NS, Kumar ADM, Balakrishnan D. Sound Waves for Unsound Entities: An Electronic Search Study to Evaluate the Diagnostic Efficacy of Ultrasonography in Cysts and Tumors of Maxillofacial Region. J Contemp Dent Pract 2013; 14(4):586-589.


2007 ◽  
Vol 76 (19) ◽  
Author(s):  
Z. H. Tang ◽  
R. W. Peng ◽  
Z. Wang ◽  
X. Wu ◽  
Y. J. Bao ◽  
...  

Author(s):  
Md Mizanur Rahman ◽  
◽  
Bidhan Chandra Nath ◽  
Subrato Paul ◽  
Md. Golam Kibria Bhuiyan ◽  
...  

This research intends to design, assemble and evaluate the performance of an eco-friendly solar light trap to reduce the insect population in rice fields as well as to minimize the use of harmful chemical pesticides. An AutoCAD drawing tool 2016 was used to sketch the design of solar light trap. The main component of this light trap was bulb, solar panel and battery. Design of solar panel and battery was done considering by 5W LED bulb. A total of five bulbs with different colors were selected to test the insect’s reaction by visible light. Study indicated that ultra violet-blue bulb showed the best performance compare to others based on the high percentage of insect trap (31.22%). A 20-watt solar panel and two 4.5 ah batteries of 6 volts were used to operate the solar light trap. The current, voltage, solar intensity was recorded to check overall performance of solar panel. The solar panel generated more power in April than May due to higher solar radiation in the study area. Study suggested that only 4.26 sunshine hours were required to full charge the battery. The solar light trap was operated 5.5 hour in night which was sufficient to reduce the insects in rice field. Moreover, the light sensor was showed 100% functional for ON/OFF purposes. The dominant insects like yellow stem borer (YSB), green leafhopper (GLH) were mostly observed. The average largest numbers of YSB and GLH were 900 and 600 respectively. In conclusion, the solar light trap is eco-friendly, low cost, easy and self-sufficient in term of solar energy. Finally, the newly developed light trap could be helpful for manufactures, decision makers, and engineering community as well as farmers as a best tool to protect nature in comparison to other pesticide using practices.


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