1
|
Aboelezz E, Pogue BW. Review of nanomaterial advances for ionizing radiation dosimetry. APPLIED PHYSICS REVIEWS 2023; 10:021312. [PMID: 37304732 PMCID: PMC10249220 DOI: 10.1063/5.0134982] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 05/01/2023] [Indexed: 06/13/2023]
Abstract
There are a wide range of applications with ionizing radiation and a common theme throughout these is that accurate dosimetry is usually required, although many newer demands are provided by improved features in higher range, multi-spectral and particle type detected. Today, the array of dosimeters includes both offline and online tools, such as gel dosimeters, thermoluminescence (TL), scintillators, optically stimulated luminescence (OSL), radiochromic polymeric films, gels, ionization chambers, colorimetry, and electron spin resonance (ESR) measurement systems. Several future nanocomposite features and interpretation of their substantial behaviors are discussed that can lead to improvements in specific features, such as (1) lower sensitivity range, (2) less saturation at high range, (3) overall increased dynamic range, (4) superior linearity, (5) linear energy transfer and energy independence, (6) lower cost, (7) higher ease of use, and (8) improved tissue equivalence. Nanophase versions of TL and ESR dosimeters and scintillators each have potential for higher range of linearity, sometimes due to superior charge transfer to the trapping center. Both OSL and ESR detection of nanomaterials can have increased dose sensitivity because of their higher readout sensitivity with nanoscale sensing. New nanocrystalline scintillators, such as perovskite, have fundamentally important advantages in sensitivity and purposeful design for key new applications. Nanoparticle plasmon coupled sensors doped within a lower Zeff material have been an effective way to achieve enhanced sensitivity of many dosimetry systems while still achieving tissue equivalency. These nanomaterial processing techniques and unique combinations of them are key steps that lead to the advanced features. Each must be realized through industrial production and quality control with packaging into dosimetry systems that maximize stability and reproducibility. Ultimately, recommendations for future work in this field of radiation dosimetry were summarized throughout the review.
Collapse
Affiliation(s)
- Eslam Aboelezz
- Ionizing Radiation Metrology Department, National Institute of Standards, Giza, Egypt
| | - Brian W. Pogue
- Department of Medical Physics, University of Wisconsin-Madison, Madison 53705, USA
| |
Collapse
|
2
|
Mahmood MM, Kakakhel MB, Wazir-Ud-Din M, Hayat S, Ahmad K, Ur-Rehman S, Siddique MT, Masood A, Ul-Haq A, Mirza SM. Thermoluminescence (TL), kinetic parameters and dosimetric features of Pakistani limestone. Appl Radiat Isot 2022; 188:110357. [PMID: 35820299 DOI: 10.1016/j.apradiso.2022.110357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 07/03/2022] [Accepted: 07/04/2022] [Indexed: 11/02/2022]
Abstract
Thermoluminescence (TL), kinetic parameters and dosimetric features of Pakistani limestone (CaCO3) is reported in this study. Both compositional and structural analyses reveal that the material has a crystalline nature with rhombohedral structure and non-uniform crystallite size having major content of CaCO3. A powdered limestone sample of 30 mg is found to be the optimized weight for TL and other dosimetric studies. After irradiating the samples with a test dose of 100 Gy using a β source three composite glow peaks termed as P1, P2 and P3 are visible at 100, 230 and 330 °C respectively using a linear heating rate of 1 °C/s during the TL readout. The Coefficient of Variation (COV) is found to be about 4%. Kinetic parameters (i.e., frequency factor (f), activation energy (E), and the kinetic order (b)) are estimated using both first and second Order of kinetics using an in-house Computerized Glow Curve Deconvolution (GCD) software. The figure-of-merit (FOM) is found to be 2.12%. The distribution of continuum traps with activation energy in the range of 0.77-2.59 eV is observed in the kinetic parameter analysis of the glow peaks of the sample. The TL response in the dose range of 1-5 Gy (not reported previously) and linearity in the dose response in the dose range of 1-10 Gy is observed in samples of Pakistani limestone. The Minimum Detectable Dose (MDD) is 1.01 Gy clearly resembling the experimentally linear fitted results. After a fading study for a period of thirty days, only the first peak i.e., P1 majorly fades while no major change is observed in the amplitude of peaks P2 and P3. In addition, P1 is the main contributor fading by 92% within the first 24 h of irradiation while P2 fades by 30 %. However, P3 shows stability with a very minor fading of 0.05% within 24 h of irradiation. This study concludes that Pakistani limestone can be further assessed as a potential radiation dosimeter for various applications.
Collapse
Affiliation(s)
- M Masood Mahmood
- Department of Physics & Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan; Heath Physics Division, PINSTECH, Nilore, Islamabad, Pakistan
| | - M Basim Kakakhel
- Department of Physics & Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan.
| | - M Wazir-Ud-Din
- Department of Physics & Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan
| | - Sikander Hayat
- Department of Physics & Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan
| | - Khalil Ahmad
- Department of Physics & Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan
| | - Shakeel Ur-Rehman
- Department of Physics & Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan
| | - M Tariq Siddique
- Department of Physics & Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan
| | - Atif Masood
- Department of Medical Physics, KIRAN Hospital, Karachi, Pakistan
| | - Asadar Ul-Haq
- Department of Medical Physics, KIRAN Hospital, Karachi, Pakistan
| | - Sikander M Mirza
- Department of Physics & Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan
| |
Collapse
|
3
|
Tariq I, Jaafar M, Abdul Razak SK, Wan Sohaimi WF, Yusoff AL. UV/Vis dose response of a reusable PMMA-NaCl polymer composite. Appl Radiat Isot 2022; 186:110293. [DOI: 10.1016/j.apradiso.2022.110293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 04/21/2022] [Accepted: 05/13/2022] [Indexed: 11/02/2022]
|
4
|
Identification of ESR centers and their role in the TL of natural salt from Lluta, Peru. Appl Radiat Isot 2022; 182:110126. [DOI: 10.1016/j.apradiso.2022.110126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 01/22/2022] [Accepted: 01/23/2022] [Indexed: 11/18/2022]
|
5
|
Ahmad K, Kakakhel MB, Hayat S, Wazir-Ud-Din M, Mahmood MM, Ur Rehman S, Siddique MT, Mirza SM. Thermoluminescence study of pellets prepared using NaCl from Khewra Salt Mines in Pakistan. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2021; 60:365-375. [PMID: 33611608 DOI: 10.1007/s00411-021-00894-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 02/01/2021] [Indexed: 06/12/2023]
Abstract
In this study, the thermoluminescence characteristics of naturally occurring salt (NaCl) were assessed for the development of a radiation dosimeter. For this purpose, mined crystalline samples of salt were procured directly from Khewra salt mines in Pakistan. The samples were hand crushed, sieved, and compressed to pellets comparable in size to standard TLD chips, and irradiated to gamma radiation doses in the range of 5 mGy and 5000 mGy. Thermoluminescence (TL) response showed three main peaks in the glow curve around 115-130 °C, 150-170 °C, and 220-240 °C. A linear TL response was observed for the dose range of 5-100 mGy. The TL response became supra-linear for the dose ranges of 100-1000 mGy and 1000-5000 mGy. The Tm-Tstop method was applied to identify the overlapping peaks of the glow curve. Computerized glow curve deconvolution (CGCD) was then employed for the characterization of electron trap parameters such as frequency factor (s), activation energy (E), and the kinetic order (b), using General Order (GO) kinetics. The figure-of-merit (FOM) was found to be 1.08%, 0.94%, 0.77%, and 0.75%, at 500 mGy, 1 Gy, 2 Gy, and 5 Gy, respectively. The TL intensity faded by 20% within the first 24 h after irradiation and finally stabilized after two weeks. In addition, structural, morphological, and elemental analyses, were also performed using various analytical techniques. X-ray diffraction (XRD) showed that the salt crystallizes in a face-centered cubic structure. Scanning electron microscope (SEM) micrographs indicated that the crystallites are closely packed and cubic-shaped with non-uniform size, and mostly found in the agglomerated form. Similarly, the elemental analysis confirmed the presence of impurities such as Mg, Sr, S, K, O, and Ca, in the samples. The present study concludes that the pellets made from salt samples from Khewra mines have a potential for use as radiation dosimeters.
Collapse
Affiliation(s)
- Khalil Ahmad
- Department of Physics & Applied Mathematics, Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan
| | - M Basim Kakakhel
- Department of Physics & Applied Mathematics, Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan.
| | - Sikander Hayat
- Department of Physics & Applied Mathematics, Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan
| | - M Wazir-Ud-Din
- Department of Physics & Applied Mathematics, Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan
| | - M Masood Mahmood
- Department of Physics & Applied Mathematics, Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan
| | - Shakeel Ur Rehman
- Department of Physics & Applied Mathematics, Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan
| | - M Tariq Siddique
- Department of Physics & Applied Mathematics, Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan
| | - Sikander M Mirza
- Department of Physics & Applied Mathematics, Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan
| |
Collapse
|
6
|
Radiometric characterisation of light sources used in analytical chemistry - A review. Anal Chim Acta 2020; 1123:113-127. [PMID: 32507235 DOI: 10.1016/j.aca.2020.04.048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 03/30/2020] [Accepted: 04/20/2020] [Indexed: 11/22/2022]
Abstract
Light sources are an indispensable component of an overwhelmingly large number of analytical methods. Radiometric characterisation of light sources in analytical chemistry is therefore of fundamental importance. This review presents up to date knowledge on methods to characterise radiometric properties of light sources in terms of radiometric power, irradiance, brightness, luminous efficacy, luminous efficiency and emission spectra, all of which are crucial parameters for their use in analytical chemistry. Special attention is paid to radiometric characterisation of new generations of light sources with focus on miniaturised and low-cost light sources suitable for portable analytical instrumentation. Miniaturised light sources, especially new generations of solid-state light sources including solution processable quantum dot light emitting diodes (QLEDs), organic LEDs (OLEDs) as well as conventional LEDs and lasers, are radiometrically characterised through various spectrophotometric, actinometric as well as new facile radiometric methods. Although the areas of analytical use of new light sources including QLEDs, OLEDs as well as other important light sources such as deep ultraviolet (DUV) and infrared LEDs in analytical chemistry are yet to reach their potential, their radiometric characterisation opens future options for their wider deployment in analytical chemistry.
Collapse
|
7
|
Properties of the model for radiation induced optically stimulated luminescence (OSL) in sodium and potassium chlorides. RADIAT MEAS 2019. [DOI: 10.1016/j.radmeas.2019.106142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
8
|
Correcher V, Briatte C, Boronat C, Garcia-Guinea J. Radiation effect on cathodoluminescence and thermoluminescence emission of Ca-rich oxalates from the human body. LUMINESCENCE 2018; 33:1438-1444. [PMID: 30378245 DOI: 10.1002/bio.3571] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 09/26/2018] [Accepted: 09/27/2018] [Indexed: 11/08/2022]
Abstract
The radiation effect of luminescence emission of Ca-rich oxalate biogenic materials (gallbladder and renal calculi) and a commercial standard sample (CaC2 O4 ·H2 O) is reported. The samples were characterized by environmental scanning electron microscopy, energy dispersive X-ray spectroscopy, thermogravimetric and differential thermal analyses, display complex cathodoluminescence (CL) and thermoluminescence (TL) glow emissions. CL spectra (in the UV-infrared range) displayed non-well defined peaks, and exhibited emission at: (i) higher energies (300-490 nm) mainly associated with non-bridging oxygen hole centers, oxygen-deficient centers and peroxy intrinsic defects, regardless of the sample; and (ii) higher, narrow and sharp wavebands, in the red region, probably induced by the presence of traces of Sm3+ (4 G5/2 →6 H9/2 transition) and/or Tb3+ (5 D4 →7 F3 transition) only for mineral-like materials in the human body. The UV-blue TL emission showed low-intensity maxima in which it was possible to distinguish at least four groups of components in each sample.
Collapse
Affiliation(s)
| | | | | | - Javier Garcia-Guinea
- CSIC. Museo Nacional de Ciencias Naturales, C/José Gutiérrez Abascal 2, Madrid, Spain
| |
Collapse
|
9
|
Guidelli EJ, Lima IS, Baffa O. Monosodium glutamate for accidental, retrospective, and medical dosimetry using electron spin resonance. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2018; 57:349-356. [PMID: 30242477 DOI: 10.1007/s00411-018-0756-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 09/14/2018] [Indexed: 06/08/2023]
Abstract
The risk of a radiation episode has increased in the last years due to several reasons. In case of a nuclear incident, as with the use of an improvised nuclear device, determination of the radiation doses received by the victims is of utmost importance to define the appropriate medical treatment or to monitor the late effects of radiation. Dose assessment in case of accidents can be performed using commonplace materials found in the accident area. In this paper, the dosimetric properties of monosodium glutamate are investigated by electron spin resonance spectroscopy (ESR), for retrospective and accidental dosimetry. The spectroscopic parameters were optimized to achieve higher signal intensity and better signal-to-noise ratio. As a result, the lowest detectable dose was 0.1 Gy, and monosodium glutamate showed a linear dose-response curve for doses ranging from 0.1 Gy to 10 kGy. The dosimetric signal was monitored from minutes right after irradiation, until 1 year. No changes in the signal intensity were observed over this period, meaning that doses could be assessed immediately after radiation exposure and can still be reconstructed long after the accident. This property also implies that late effects due to victim's radiation exposure could be better monitored and understood. ESR signal intensity for samples irradiated with a photon energy below 100 keV was decreased by only 27% and no dose-rate dependence was noticed. Therefore, the ability to measure doses as low as 0.1 Gy, the high stability of the dosimetric signal, as well as independence on dose rate, tissue equivalence, low-cost, and wide commercial availability make monosodium glutamate a very good dosimetric material not only for retrospective and accidental but also for medical dosimetry.
Collapse
Affiliation(s)
- Eder J Guidelli
- Departamento de Física, Universidade de São Paulo, Ribeirão Prêto, SP, Brazil.
| | - Iara S Lima
- Departamento de Física, Universidade de São Paulo, Ribeirão Prêto, SP, Brazil
| | - Oswaldo Baffa
- Departamento de Física, Universidade de São Paulo, Ribeirão Prêto, SP, Brazil
| |
Collapse
|
10
|
Majgier R, Biernacka M, Palczewski P, Mandowski A, Polymeris GS. Investigation on thermally assisted optically stimulated luminescence (TA - OSL) signal in various sodium chloride samples. Appl Radiat Isot 2018; 143:98-106. [PMID: 30391717 DOI: 10.1016/j.apradiso.2018.10.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 10/11/2018] [Accepted: 10/16/2018] [Indexed: 11/24/2022]
Abstract
Sodium chloride (NaCl) is a phosphor with potential significance in retrospective dosimetry and geological dating. NaCl has been extensively studied for practical use in OSL dosimetry, however, the exact mechanism of the OSL emission is not well explained. This work attempts to extend the information on NaCl luminescent properties by establishing the occurrence of very deep traps in NaCl using the thermally assisted OSL (TA - OSL) method. The studied material was sodium chloride in different forms: halite minerals from Kłodawa salt mine in Poland and NaCl in chemically pure form. The isothermal TA - OSL signal was measured at various temperatures between 25 °C and 280 °C after a prior irradiation and TL erasing of shallow and main traps. The appearance of a strong TA - OSL signal indicates the occurrence of very deep traps in all forms of investigated salt. The temperature dependence of TA - OSL was determined and the activation energy for thermal assistance corresponding to deep traps in NaCl was estimated. For selected temperatures of TA - OSL readout (200 °C and 280 °C) the dose response was examined in wide dose range (1-1000 Gy). Sublinearity was found in different dose range depending on the type of samples.
Collapse
Affiliation(s)
- Renata Majgier
- Institute of Physics, Jan Dlugosz University, ul. Armii Krajowej 13/15, 42-202 Częstochowa, Poland.
| | - Magdalena Biernacka
- Institute of Physics, Jan Dlugosz University, ul. Armii Krajowej 13/15, 42-202 Częstochowa, Poland
| | - Piotr Palczewski
- Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5/7, 87-100 Torun, Poland
| | - Arkadiusz Mandowski
- Institute of Physics, Jan Dlugosz University, ul. Armii Krajowej 13/15, 42-202 Częstochowa, Poland
| | - George S Polymeris
- Institute of Nuclear Sciences, Ankara University, TR-06100 Beşevler, Ankara, Turkey
| |
Collapse
|
11
|
Yüce ÜR, Engin B. Effect of particle size on the thermoluminescence dosimetric properties of household salt. RADIAT MEAS 2017. [DOI: 10.1016/j.radmeas.2017.05.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
12
|
Christiansson M, Geber-Bergstrand T, Bernhardsson C, Mattsson S, Rääf CL. RETROSPECTIVE DOSIMETRY USING SALTED SNACKS AND NUTS: A FEASIBILITY STUDY. RADIATION PROTECTION DOSIMETRY 2017; 174:1-5. [PMID: 26994095 DOI: 10.1093/rpd/ncw044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Accepted: 02/03/2016] [Indexed: 06/05/2023]
Abstract
The possibility of using ordinary household table salt for dosimetry is suggested by its high sensitivity to ionising radiation, which generates a readout of optically stimulated luminescence (OSL). However, to exploit this finding for retrospective human dosimetry, it would be needed to find salt in close proximity to the exposed individual. Finding salty snacks frequently tucked into handbags, backpacks or pockets seemed to be a possibility; these items therefore became the test materials of the present study. The aluminium or cardboard packages used to exclude the moisture that makes crisps and nuts go soft and stale also helps to retain the induced OSL signal. Therefore, different snacks, either their salt component alone or mixed with the snack, are exposed to ionising radiation and then were assessed for their dosimetric properties. The results indicate the feasibility of using some salty snacks for dosimetry, with a minimum detectable dose as low as 0.2 mGy.
Collapse
Affiliation(s)
- M Christiansson
- Medical Radiation Physics, Department of Translational Medicine, Lund University, Skåne University Hospital Malmö, Malmö SE-205 02, Sweden
| | - T Geber-Bergstrand
- Medical Radiation Physics, Department of Translational Medicine, Lund University, Skåne University Hospital Malmö, Malmö SE-205 02, Sweden
| | - C Bernhardsson
- Medical Radiation Physics, Department of Translational Medicine, Lund University, Skåne University Hospital Malmö, Malmö SE-205 02, Sweden
| | - S Mattsson
- Medical Radiation Physics, Department of Translational Medicine, Lund University, Skåne University Hospital Malmö, Malmö SE-205 02, Sweden
| | - C L Rääf
- Medical Radiation Physics, Department of Translational Medicine, Lund University, Skåne University Hospital Malmö, Malmö SE-205 02, Sweden
| |
Collapse
|
13
|
Guidelli EJ, Ramos AP, Baffa O. Enhancing and quenching luminescence with gold nanoparticle films: the influence of substrate on the luminescent properties. NANOTECHNOLOGY 2016; 27:015503. [PMID: 26606392 DOI: 10.1088/0957-4484/27/1/015503] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Gold nanoparticle (AuNP) films were sputtered over glass and aluminum substrates to enhance optically stimulated luminescence (OSL), a luminescent technique employed for radiation detection, from x-ray irradiated NaCl nanocrystals. The AuNP films deposited over glass led to enhanced-OSL emission, whereas the AuNP films deposited on aluminum substrates quenched the OSL emission. The enhanced-OSL intensity is proportional to the optical density of the film's plasmon resonance band at the stimulation wavelength. For the case of the AuNP/aluminum films, the luminescence quenching diminishes, and OSL intensity partially recovers upon increasing the distance between the AuNPs and the aluminum substrates, and between the luminescent nanocrystals and the AuNP films. These results suggest that plasmonic interactions between the emitter nanocrystals, the localized surface plasmons (LSP) of the AuNPs, and the substrate are responsible for the OSL enhancement and quenching. In this sense, the substrate dictates whether LSP relaxation occurs by radiative or non-radiative transisitions, leading to enhanced or quenched OSL, respectively. Therefore, besides showing that AuNP films can enhance and/or tune the sensitivity of luminescent radiation detectors, and demonstrating OSL as a new technique to investigate mechanisms of plasmon-enhanced luminescence, these results bring insights on how substrates strongly modify the optical properties of AuNP films.
Collapse
Affiliation(s)
- Eder José Guidelli
- Departamento de Física, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, 14040-901, Ribeirão Preto, SP, Brasil
| | | | | |
Collapse
|
14
|
Norrbo I, Gluchowski P, Paturi P, Sinkkonen J, Lastusaari M. Persistent Luminescence of Tenebrescent Na8Al6Si6O24(Cl,S)2: Multifunctional Optical Markers. Inorg Chem 2015; 54:7717-24. [PMID: 26247100 DOI: 10.1021/acs.inorgchem.5b00568] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Na8Al6Si6O24(Cl,S)2 materials were prepared with a solid state reaction. The products were studied using X-ray powder diffraction, reflectance measurements as well as X-ray fluorescence, conventional and persistent luminescence, nuclear magnetic resonance, and electron paramagnetic resonance spectroscopies. All materials containing sulfur showed purple tenebrescence, which persisted 2 days in a lit room at room temperature. Considerable blue persistent luminescence peaking at 460 nm and lasting for 1 h was obtained, as well. Persistent luminescence was obtained with irradiation at 365 nm, while tenebrescence required 254 nm. The materials show great promise as low-cost multifunctional optical markers.
Collapse
Affiliation(s)
- Isabella Norrbo
- †Department of Chemistry, University of Turku, FI-20014 Turku, Finland
| | - Pawel Gluchowski
- ‡Institute of Low Temperature and Structure Research Polish Academy of Sciences, PL-50422 Wroclaw, Poland
| | - Petriina Paturi
- §Department of Physics and Astronomy, Wihuri Physical Laboratory, University of Turku, FI-20014 Turku, Finland
| | - Jari Sinkkonen
- †Department of Chemistry, University of Turku, FI-20014 Turku, Finland
| | - Mika Lastusaari
- †Department of Chemistry, University of Turku, FI-20014 Turku, Finland.,¶Turku Centre for Materials and Surfaces (MatSurf), FI-20014 Turku, Finland
| |
Collapse
|
15
|
Timar-Gabor A, Trandafir O. On optically stimulated luminescence properties of household salt as a retrospective dosemeter. RADIATION PROTECTION DOSIMETRY 2013; 155:404-409. [PMID: 23443414 DOI: 10.1093/rpd/nct027] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Thermoluminescence (TL) and optically stimulated luminescence (OSL) in the UV (270-370 nm) spectral region have been investigated for five types of table salt (NaCl) available in Romanian supermarkets with a view to applying them in retrospective dosimetry. The salt samples gave bright TL signals with two main peaks at ∼100°C and at 300 or 260°C, depending on the origin of the salt and bright OSL signals under continuous stimulation with blue light. The OSL signal (stimulated at 100°C after a pre-heat of 10 s at 150°C) was used for investigations in a standard multiple aliquot procedure. The dose-response was found to be linear in the dose range investigated (up to ∼100 mGy) and the lower limit of detection for the samples varied from ∼0.01 to 14 mGy. These characteristics, along with the widespread abundance and low cost of household salt, confirm its potential as a retrospective dosemeter.
Collapse
Affiliation(s)
- Alida Timar-Gabor
- Faculty of Environmental Sciences and Engineering, Babeş-Bolyai University, Fântânele 30, Cluj-Napoca 400294, Romania.
| | | |
Collapse
|
16
|
Sago T, Ishii H, Hagihara H, Takada N, Suda H. Analysis of chemiluminescence spectra in oxidative degradation of oleic acid. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.02.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|