Energy storage phosphors @ Phosphor Global Summit 2019Philippe Smet
Presentation on opportunities and limitations of energy storage phosphors, which can be used for glow-in-the-dark roads or safety illumination. Loss mechanisms in phosphors. Presented at the Phosphor Global Summit and Quantum Dot Forum 2019 in San Diego, La Jolla, California. March 19-21.
Microwave radiation guidelines and debate during the last 50 yearsMikko Ahonen
Radiofrequency (RF) radiation guidelines. Debate between East and West on health effects. Science and politics. ICNIRP, FCC and IEEE. Radars, mobile phones, base stations and Wi-Fi. Relevant also to future technologies (like 5G).
Energy storage phosphors @ Phosphor Global Summit 2019Philippe Smet
Presentation on opportunities and limitations of energy storage phosphors, which can be used for glow-in-the-dark roads or safety illumination. Loss mechanisms in phosphors. Presented at the Phosphor Global Summit and Quantum Dot Forum 2019 in San Diego, La Jolla, California. March 19-21.
Microwave radiation guidelines and debate during the last 50 yearsMikko Ahonen
Radiofrequency (RF) radiation guidelines. Debate between East and West on health effects. Science and politics. ICNIRP, FCC and IEEE. Radars, mobile phones, base stations and Wi-Fi. Relevant also to future technologies (like 5G).
Plenary lecture - XV B-MRS Meeting - Campinas, SP, Brazil - September, 25 to 29, 2016.
Author: Elvira Fortunato (CENIMAT, Universidade Nova de Lisboa, Portugal).
ML-3 - Persistent Phosphors under PressurePhilippe Smet
Slides from plenary talk at the Third Conference on Mechanoluminescence and Novel structural health diagnosis, Hong Kong, December 15-17 2017. Covers absolute trapping capacity of persistent phosphors, the number and nature of energy traps and ML in selected compounds (BaSi2O2N2:Eu and CaZnOS:Mn).
Apresentação do Instituto Nacional de Engenharia de Superfícies no evento de avaliação do Programa INCTs, realizado em Brasília nos dias 23 e 24 de novembro de 2010. Prof. Fernando Lázaro Freire Junior (coordenador do Instituto Nacional de Engenharia de Superfícies).
EFFECT OF NANO SiO2 ON SOME MECHANICAL PROPERTIES OF BIODEGRADABLE POLYLACTIC...IAEME Publication
Effect of nano SiO2(13.69nm)with different weight percentage (1, 3, 5wt %)on some mechanical properties of polylactic acid (PLA) is investigated .PLA film with thickness 100µm was
prepared by solution casting method .Chemical and crystal structure of PLA and its composites with 5% nano SiO2 are characterized by FTIR and X-ray diffraction techniques .
Seminário proferido pelo pesquisador Thiago Burgo (Unicamp) em 26 de agosto de 2015 para cerca de 20 estudantes e professores, na seção UCS (Caxias do Sul, RS) do Instituto Nacional de Engenharia de Superfícies.
Plenary lecture - XV B-MRS Meeting - Campinas, SP, Brazil - September, 25 to 29, 2016.
Author: Elvira Fortunato (CENIMAT, Universidade Nova de Lisboa, Portugal).
ML-3 - Persistent Phosphors under PressurePhilippe Smet
Slides from plenary talk at the Third Conference on Mechanoluminescence and Novel structural health diagnosis, Hong Kong, December 15-17 2017. Covers absolute trapping capacity of persistent phosphors, the number and nature of energy traps and ML in selected compounds (BaSi2O2N2:Eu and CaZnOS:Mn).
Apresentação do Instituto Nacional de Engenharia de Superfícies no evento de avaliação do Programa INCTs, realizado em Brasília nos dias 23 e 24 de novembro de 2010. Prof. Fernando Lázaro Freire Junior (coordenador do Instituto Nacional de Engenharia de Superfícies).
EFFECT OF NANO SiO2 ON SOME MECHANICAL PROPERTIES OF BIODEGRADABLE POLYLACTIC...IAEME Publication
Effect of nano SiO2(13.69nm)with different weight percentage (1, 3, 5wt %)on some mechanical properties of polylactic acid (PLA) is investigated .PLA film with thickness 100µm was
prepared by solution casting method .Chemical and crystal structure of PLA and its composites with 5% nano SiO2 are characterized by FTIR and X-ray diffraction techniques .
Seminário proferido pelo pesquisador Thiago Burgo (Unicamp) em 26 de agosto de 2015 para cerca de 20 estudantes e professores, na seção UCS (Caxias do Sul, RS) do Instituto Nacional de Engenharia de Superfícies.
Official announcement of the next edition of the event.BMRS Meeting
Presentation of the XXI B-MRS Meeting (Maceió, AL, Oct 1st to 5th, 2023) by the chair Prof. Carlos Jacinto da Silva (UFAL) at the closing session of the XX B-MRS Meeting.
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...University of Maribor
Slides from talk:
Aleš Zamuda: Remote Sensing and Computational, Evolutionary, Supercomputing, and Intelligent Systems.
11th International Conference on Electrical, Electronics and Computer Engineering (IcETRAN), Niš, 3-6 June 2024
Inter-Society Networking Panel GRSS/MTT-S/CIS Panel Session: Promoting Connection and Cooperation
https://www.etran.rs/2024/en/home-english/
The use of Nauplii and metanauplii artemia in aquaculture (brine shrimp).pptxMAGOTI ERNEST
Although Artemia has been known to man for centuries, its use as a food for the culture of larval organisms apparently began only in the 1930s, when several investigators found that it made an excellent food for newly hatched fish larvae (Litvinenko et al., 2023). As aquaculture developed in the 1960s and ‘70s, the use of Artemia also became more widespread, due both to its convenience and to its nutritional value for larval organisms (Arenas-Pardo et al., 2024). The fact that Artemia dormant cysts can be stored for long periods in cans, and then used as an off-the-shelf food requiring only 24 h of incubation makes them the most convenient, least labor-intensive, live food available for aquaculture (Sorgeloos & Roubach, 2021). The nutritional value of Artemia, especially for marine organisms, is not constant, but varies both geographically and temporally. During the last decade, however, both the causes of Artemia nutritional variability and methods to improve poorquality Artemia have been identified (Loufi et al., 2024).
Brine shrimp (Artemia spp.) are used in marine aquaculture worldwide. Annually, more than 2,000 metric tons of dry cysts are used for cultivation of fish, crustacean, and shellfish larva. Brine shrimp are important to aquaculture because newly hatched brine shrimp nauplii (larvae) provide a food source for many fish fry (Mozanzadeh et al., 2021). Culture and harvesting of brine shrimp eggs represents another aspect of the aquaculture industry. Nauplii and metanauplii of Artemia, commonly known as brine shrimp, play a crucial role in aquaculture due to their nutritional value and suitability as live feed for many aquatic species, particularly in larval stages (Sorgeloos & Roubach, 2021).
What is greenhouse gasses and how many gasses are there to affect the Earth.moosaasad1975
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
This presentation explores a brief idea about the structural and functional attributes of nucleotides, the structure and function of genetic materials along with the impact of UV rays and pH upon them.
ANAMOLOUS SECONDARY GROWTH IN DICOT ROOTS.pptxRASHMI M G
Abnormal or anomalous secondary growth in plants. It defines secondary growth as an increase in plant girth due to vascular cambium or cork cambium. Anomalous secondary growth does not follow the normal pattern of a single vascular cambium producing xylem internally and phloem externally.
Nucleophilic Addition of carbonyl compounds.pptxSSR02
Nucleophilic addition is the most important reaction of carbonyls. Not just aldehydes and ketones, but also carboxylic acid derivatives in general.
Carbonyls undergo addition reactions with a large range of nucleophiles.
Comparing the relative basicity of the nucleophile and the product is extremely helpful in determining how reversible the addition reaction is. Reactions with Grignards and hydrides are irreversible. Reactions with weak bases like halides and carboxylates generally don’t happen.
Electronic effects (inductive effects, electron donation) have a large impact on reactivity.
Large groups adjacent to the carbonyl will slow the rate of reaction.
Neutral nucleophiles can also add to carbonyls, although their additions are generally slower and more reversible. Acid catalysis is sometimes employed to increase the rate of addition.
ESR spectroscopy in liquid food and beverages.pptxPRIYANKA PATEL
With increasing population, people need to rely on packaged food stuffs. Packaging of food materials requires the preservation of food. There are various methods for the treatment of food to preserve them and irradiation treatment of food is one of them. It is the most common and the most harmless method for the food preservation as it does not alter the necessary micronutrients of food materials. Although irradiated food doesn’t cause any harm to the human health but still the quality assessment of food is required to provide consumers with necessary information about the food. ESR spectroscopy is the most sophisticated way to investigate the quality of the food and the free radicals induced during the processing of the food. ESR spin trapping technique is useful for the detection of highly unstable radicals in the food. The antioxidant capability of liquid food and beverages in mainly performed by spin trapping technique.
hematic appreciation test is a psychological assessment tool used to measure an individual's appreciation and understanding of specific themes or topics. This test helps to evaluate an individual's ability to connect different ideas and concepts within a given theme, as well as their overall comprehension and interpretation skills. The results of the test can provide valuable insights into an individual's cognitive abilities, creativity, and critical thinking skills
Comparing Evolved Extractive Text Summary Scores of Bidirectional Encoder Rep...University of Maribor
Slides from:
11th International Conference on Electrical, Electronics and Computer Engineering (IcETRAN), Niš, 3-6 June 2024
Track: Artificial Intelligence
https://www.etran.rs/2024/en/home-english/
Polymer Materials: from Electrets to Organic Electronics
1. Prof. Roberto Mendonça Faria (IFSC/USP)
Polymer Materials: from
Electrets to Organic Electronics
Roberto Mendonça Faria
Instituto de Física de São Carlos, Universidade de São Paulo
2. Focus of this Lecture
- Short history of the Bernhard Gross Polymer Group of the São
Carlos Institute of Physics, USP;
- network research organizations: (i) Millennium Institute of
Polymer Materials (IMMP - 2002-2008), and (ii) National Institute
of Science and Technology on Organic Electronics (INEO - 2009 -
2023);
- brief reports of the most relevant researches along 40 years on
electrical properties of polymer films and on organic electronics.
Prof. Roberto Mendonça Faria (IFSC/USP)
3. PRECURSORS OF MATERIALS SCIENCE IN
BRAZIL
Prof. Bernhard Gross Prof. Joaquim da Costa Ribeiro
Prof. Roberto Mendonça Faria (IFSC/USP)
Considered the father of modern electret
Developed pioneering models on viscoelasticity
Rheology
First scientist to describe the thermodielectric effect
5. Prof. Roberto Mendonça Faria (IFSC/USP)
Group of Electrets – IFQSC/USP (Early 1970)
Faculty (1975):
Guilherme Fontes Leal Ferreira
Milton Soares de Campos
Renê A. Alfaro Moreno
Emeritus affiliate:
Bernhard Gross
Graduate students:
José Alberto Giacometti
Luis Nunes de Oliveira
Roberto Mendonça Faria
Sérgio Mergulhão
Osvaldo Novais de Oliveira Jr.
6. Prof. Roberto Mendonça Faria (IFSC/USP)
Faculty (1980s):
Guilherme Fontes Leal Ferreira
Milton Soares de Campos
José Alberto Giacometti (1977)
Roberto Mendonça Faria (1977)
Mariângela T. Figueiredo (1979)
Osvaldo Novais de Oliveira Jr. (1985)
Emeritus affiliate:
Bernhard Gross
Graduate students:
More than 30
Group of Electrets – IFQSC/USP (1980s)
7. Prof. Roberto Mendonça Faria (IFSC/USP)
First Meeting of Condesend Matter (1978)
SBF – Cambuquira/MG
9. Prof. Roberto Mendonça Faria (IFSC/USP)
Insulating polymers
(Late 1970s and 1980s)
ELECTRETS
10. Prof. Roberto Mendonça Faria (IFSC/USP)
MAGNET AND ELECTRETS
Magnet
External Magnetic Field
Space charge Electret
External Electric Field
Polar Electret
External Electric Field
11. Prof. Roberto Mendonça Faria (IFSC/USP)
POLYMER ELECTRETS
Teflon FEP
Space charge Surface charges Oriented dipoles
12. Prof. Roberto Mendonça Faria (IFSC/USP)
CORONA DISCHARGE
B. Gross, G. F. Leal Ferreira, O. N. Oliveira Jr., J. Appl. Phys. 58, 1487-1491 (1984)
J.A. Giacometti, Rev. Sci. Inst. 89, 055109 (2018)
R. A. Moreno & B. Gross, J. Appl. Phys. 47(8), 3397-3402 (1976)
B. Gross, J. A. Giacometti, G. F. Leal Ferreira, IEEE Transactions on Nuclear Science, NS-28 (6), 47(8), 4513-4522 (1981)
13. Prof. Roberto Mendonça Faria (IFSC/USP)
First project on electret microfones
(IFQSC and Eletroacúscita Co, supported by Telebrás)
14. Prof. Roberto Mendonça Faria (IFSC/USP)
ELECTRET MICROPHONE
Market of electret microphones (2022) 1.2 billions of USD
15. Prof. Roberto Mendonça Faria (IFSC/USP)
Insulating polymers
(Late 1970s and 1980s)
RADIATION EFFECTS
16. Prof. Roberto Mendonça Faria (IFSC/USP)
RADIATION INDUCED CONDUCTIVITY
B. Gross, R. M. Faria & G. F. Leal Ferreira, J. Appl. Phys. 52(2), 571-577 (1981)
A. Tyutnev, V. Saenko, A. Zhadov, E. Pozhidaev, Polymers 11(12), 2061-2074 (2019)
17. Prof. Roberto Mendonça Faria (IFSC/USP)
Compton Current
B. Gross, R. M. Faria & G. F. Leal Ferreira, J. Appl. Phys. 52(2), 571-577 (1981)
Angular distribution of Compton electrons
Compton scattering
18. Prof. Roberto Mendonça Faria (IFSC/USP)
Insulating polymers
(Along1980s)
FERROELECTRICITY
19. Prof. Roberto Mendonça Faria (IFSC/USP)
FERROELECTRIC POLYMERS
Polyvinylidene Fluoride (PVDF) Poly(Vinylidene Fluoride – Tri-Fluoroethylene)
Prof. Eiichi Fukada
20. Prof. Roberto Mendonça Faria (IFSC/USP)
Second project on piezo microfones
(IFQSC and Eletroacúscita Co, supported by Telebrás)
22. Prof. Roberto Mendonça Faria (IFSC/USP)
Studies on Ferroelectric
Polymers and Piezoelectricity
23. Prof. Roberto Mendonça Faria (IFSC/USP)
Ferroelectric phase transitions:
Pyroelectric current and piezoelectric noise
R. M. Faria, J. M. G. Neto & O. N. Oliveira Jr., J. Php. D: Appl. Phys. 27. 611-615 (1994)
Poly(Vinylidene Fluoride – Tri-Fluoroethylene): P(VDF-TrFE)
Thermally Stimulated Depolarization and Dielectric Constant measurements
24. Prof. Roberto Mendonça Faria (IFSC/USP)
DC Piezoelectricity
Corona discharging, heat pulse and piezo measurements
R. M. Faria, Appl. Phys. Lett. 69, 1972-1976 (1996)
Space charge electrets (non polar)
25. Prof. Roberto Mendonça Faria (IFSC/USP)
DC Piezoelectricity
No current signal under
mechanical stress
𝑥 = 0
𝐿
𝑥𝜌 𝑥 𝑑𝑥
0
𝐿
𝜌 𝑥 𝑑𝑥
=
𝜀𝑉
𝜎
𝑑𝑥
𝑑𝑋
=
𝑑
𝜌
R. M. Faria, Appl. Phys. Lett. 69, 1972-1976 (1996)
Heating process
Compression
Decompression
26. Prof. Roberto Mendonça Faria (IFSC/USP)
In 1990
Group of Electrets
Electronic polymers come on the scene
31. Prof. Roberto Mendonça Faria (IFSC/USP)
Researches on electrical properties of
organic semiconductors
(1990s)
32. Prof. Roberto Mendonça Faria (IFSC/USP)
Oxidation states of polyanilines
J.E. Albuquerque, L.H.C. Mattoso, D.T. Balogh, R.M. Faria, J.G. Masters,
A.G. MacDiarmid, Synth. Met. 113 19–22 (2000)
33. Prof. Roberto Mendonça Faria (IFSC/USP)
Thermal conductivity vs Electric conductivity
J. E. De Albuquerque, W. L. B. Melo, R. M. Faria, J. Polym. Sci. Part B:
Pol. Phys. 38, 1294-1300 (2000)
Polyaniline sample Undoped Doped (HCl 10-3 M) Doped (HCl 1 M)
Ks (W/mk) 7.44 x 10-2 7.52 x 10-2 7.95 x 10-2
Photothermal spectroscopy (pyroelectric chamber)
34. Prof. Roberto Mendonça Faria (IFSC/USP)
Millennium Institute of Polymer Materials
(2002 – 2008)
IMMP
35. Prof. Roberto Mendonça Faria (IFSC/USP)
First BMRS
Meeting
Rio de Janeiro, july 7-10, 2002
SYMPOSIUM A
Current trends in nanostructured materials and systems
SYMPOSIUM B
Advances in the development of biomaterials
SYMPOSIUM C
Boundaries in semiconductor materials and devices
SYMPOSIUM D
III Brazilian Electroceramics Symposium
SYMPOSIUM E
Surface modification in polymeric materials and thin films
WORKSHOP
Particulate materials: processing, properties and applications
36. Prof. Roberto Mendonça Faria (IFSC/USP)
National Institute of Science and Technology on
Organic Electronics (2009 – 2023)
37. Prof. Roberto Mendonça Faria (IFSC/USP)
XX BMRS Meeting
SYMPOSIUM E
Energy Harvesting: Perovskite, Organic, Hybrid, Quantum Dots, and Dye-Sensitized Solar
Cells
SYMPOSIUM R
Organic Electronics, Photonics and Bioelectronics: Fundamentals, Applications and
Emerging Technologies
38. Prof. Roberto Mendonça Faria (IFSC/USP)
Researches on Electronic and
Optoelectronic Devices
(Since the end of 1990s)
39. Prof. Roberto Mendonça Faria (IFSC/USP)
Field effect transistor using POMA films: OFET
C.F.O. Graeff, R.K. Onmori, F.E.G. Guimarães & R.M. Faria, Synt. Met. 105, 151-152 (1999)
R. F. Bianchi, R. K. Onmori & R. M. Faria, J. Polym. Sci. B: Polymer Physics, 43, 74–78 (2005)
40. Prof. Roberto Mendonça Faria (IFSC/USP)
OLEDs and OLECs
C. A. Olivati, R. M. Faria, R. F. Bianchi, D. T. Balogh, R. K. Onmori, A. M. Andrade, Synth. Met. 121(1-3), 1579-1580 (2001)
L. F. Santos, L. M. Carvalho, F. E. G. Guimarães, D. Gonçalves, R. M. Faria, Synth. Met. 121 (1-3), 1697-1698 (2001)
41. Prof. Roberto Mendonça Faria (IFSC/USP)
White OLED
J. F. de Deus, G. C. Faria, R. M. Faria, E. T. Iamazaki, T. D.Z. Atvars, A. Cirpan, L. Akcelrud, Journal of Photochemistry and
Photobiology A: Chemistry 253, 45– 51 (2013)
42. Prof. Roberto Mendonça Faria (IFSC/USP)
OPVs
R. K. Onmori, C. A. Olivati, R. F. Bianchi, R. M. Faria, A. M. Andrade, Synth. Met. 121, 1577-1578 (2001)
44. Prof. Roberto Mendonça Faria (IFSC/USP)
Donor and acceptor molecules
Non fullerene acceptors
45. Prof. Roberto Mendonça Faria (IFSC/USP)
Solar cell: J-V curve and equivalent circuit
Dark
Under illumination
V
46. BHJ Organic Solar Cell: Efficiency
Main reasons for low efficiency of BHJ-OSCs:
- low mobility and high recombination
TSol = 5.778 K
TTerra = 300 K
...............................................................................................................................
Prof. Roberto Mendonça Faria (IFSC/USP)
47. Prof. Roberto Mendonça Faria (IFSC/USP)
Photo-CELIV, TOF, TPV, and TPC techiques
Stationary techniques
Transient technique
Gregório C. Faria
D. R. B. Amorim, M. R. P. da Silva, D. J. Coutinho, G. C. Faria
48. Prof. Roberto Mendonça Faria (IFSC/USP)
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
D. J. Coutinho, G. C. Faria, D. T. Balogh, Solar Energy Materials & Solar Cells 143,
503-509 (2015)
𝐽𝑝ℎ(v) = 2𝑒𝐺𝑃𝐿
1−
𝑉
𝑉𝑏𝑖
2
𝜃𝑜
1 +
𝜃𝑜
1−
𝑉
𝑉𝑏𝑖
2 − 1 , 𝜃𝑜=
GPL
4
1−𝑃 𝛾𝐿
(μ𝑉𝑏𝑖)
2 .
D. R.B. Amorim, D. J. Coutinho, P. B. Miranda & R. M. Faria, Phys. Rev. App. 14,
034046 (1- 9) (2020)
J-V: Recombination of first order kinetics
J-V: Recombination of second order kinetics
CT states: geminate recombination
Nongeminate recombination
J-V: Analytical models
49. Prof. Roberto Mendonça Faria (IFSC/USP)
Transient characterization
Experimental setup
Response only under
continuous white light Response after the
incidence of a laser pulse
M. R. P. da Cunha, D. R. B. Amorim, G. C. Faria, D. J. Coutinho & R. M. Faria, Solar Energy Materials & Solar Cells 231 (1-8),
111313 (2021)
50. -RL Response
Prof. Roberto Mendonça Faria (IFSC/USP)
101
102
103
104
105
106
107
0.1
1
10
Tempo
de
decaimento
(
ms
)
RL (W)
I II III
m
M. R. P. da Cunha, D. R. B. Amorim, G. C. Faria, D. J. Coutinho & R. M. Faria, Solar Energy Materials & Solar Cells 231 (1-8),
111313 (2021)
51. Prof. Roberto Mendonça Faria (IFSC/USP)
101
102
103
104
105
106
107
0.1
1
10
Tempo
de
decaimento
(
ms
)
RL (W)
I II III
m
-RL vs J-V
0.0 0.2 0.4 0.6 0.8 1.0
-16
-14
-12
-10
-8
-6
-4
-2
0
2
J(mA/cm
2
)
V(V)
Model
Equation
Plot
Rs
Rsh
Jph
Js
n
Vt
S
Reduced Chi-Sqr
R-Square (COD)
Adj. R-Square
I II III