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Artykuły w czasopismach na temat „Opalas”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 16 lutego 2022

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1

Schiavetto, Mateus Geraldo, Roberto Bertholdo, Sidney José Lima Ribeiro, and Younès Messaddeq. "Síntese e caracterização de esferas monodispersas de látex e sua utilização no preparo de filmes de cristais coloidais tridimensionais." Eclética Química 34, no. 4 (2009): 79–86. http://dx.doi.org/10.1590/s0100-46702009000400007.

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Esferas de poliestireno foram obtidas através da polimerização do estireno sem a presença de emulsificante. A suspensão foi caracterizada por Espalhamento de Luz e Microscopia Eletrônica de Transmissão apresentando monodispersidade com tamanho em torno de 463 nm. O método de deposição vertical foi utilizado para preparar filmes em substratos de vidro a partir da suspensão de esferas. Filmes de opalas de alta qualidade foram obtidos e caracterizados por Espectroscopia de Reflectância, Microscopia Eletrônica de Varredura e Microscopia Óptica.

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Lani, João Luiz, Larry Schwandes, Sérvulo Batista de Rezende, et al. "Uso de opalas biogênicas na identificação de sedimentos lacustres e marinhos." Revista Brasileira de Ciência do Solo 31, no. 4 (2007): 827–32. http://dx.doi.org/10.1590/s0100-06832007000400023.

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Procurou-se utilizar opalas biogênicas, também conhecidas como espículas ou "pó-de-mico", como identificadoras de sedimentos lacustres ou marinhos. Para isso, analisaram-se camadas e horizontes de um Gleissolo Tiomórfico Húmico na região do rio Riacho, Aracruz, ES. Cada amostra de solo foi submetida a tratamentos específicos para o isolamento das espículas; posteriormente, elas foram identificadas em microscópico eletrônico de varredura. Verificou-se a presença de espículas de origem tanto lacustre como marinha e que estas, além de serem úteis na identificação da origem dos sedimentos, podem p

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3

Milanez, Bruno, and José Antonio Puppim. "Ambiente, pessoas e labor: APLs além do desenvolvimento econômico na mineração de opalas em Pedro II, no Piauí." Cadernos EBAPE.BR 7, no. 4 (2009): 527–46. http://dx.doi.org/10.1590/s1679-39512009000400001.

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Este artigo propõe que políticas públicas voltadas para arranjos produtivos lo0cais (APLs) têm um importante potencial para melhorar o desempenho dos pequenos garimpos e minas de gemas no Brasil, desde que integrem questões ambientais e sociais às ações voltadas ao desenvolvimento econômico. Esse argumento é baseado no estudo empírico dos problemas socioambientais enfrentados pelo APL de opalas em Pedro II, no Piauí. O estudo foi desenvolvido através da metodologia de estudos de caso, envolvendo extensa revisão bibliográfica, pesquisa em documentos do APL e entrevistas com vários integrantes d

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Pinheiro, Edilson D., Luiz F. Prachia, Elvira R. P. Velloso, et al. "Experience of a Brazilian Institution with Treatment of Adult Acute Lymphoblastic Leukemia." Blood 108, no. 11 (2006): 4533. http://dx.doi.org/10.1182/blood.v108.11.4533.4533.

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Abstract Adult Acute Lymphoblastic (ALL) is an aggressive bone marrow neoplasm, associated with a poor outcome in adult patients. The aim of this study is to compare different treatment protocols analyzing complete response after induction treatment (CR), overall survival (OS) and disease free survival (DFS). Statistical analysis was done by SPSS 10.0. The analysis of prognostic factors, protocols and response treatment was done by Pearson’s chi-square. OS and DFS curves were constructed by Kaplan-Meyer method and differences were analyzed by log-rank test. In our institutional department, 102

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5

Resende, Natália Carolina Alencar, and Mailce Borges Mota. "A behavioral study to investigate the processing routes of grammatical gender in Brazilian Portuguese." REVISTA DE ESTUDOS DA LINGUAGEM 25, no. 3 (2017): 1367. http://dx.doi.org/10.17851/2237-2083.25.3.1367-1395.

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Este artigo apresenta um estudo comportamental que teve como objetivo investigar se substantivos inanimados do português do Brasil, transparentes quanto ao seu gênero gramatical (substantivos femininos terminados em -a e masculinos terminados em -o) e opacos (outras terminações) são ou não processados por mecanismos cognitivos distintos. Para tanto, uma tarefa de concordância de gênero foi executada por 19 sujeitos em duas condições: entre um artigo definido e um substantivo (condição 1) e entre um substantivo e um adjetivo (condição 2). Fatores como a frequência dos substantivos e adjetivos (

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6

Ayalew, Dereje, Raphael Pik, Sally Gibson, Gezahegn Yirgu, Seid Ali, and Dereje Assefa. "Pedogenic origin of Mezezo opal hosted in Ethiopian Miocene rhyolites." Canadian Mineralogist 58, no. 2 (2020): 231–46. http://dx.doi.org/10.3749/canmin.1900059.

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ABSTRACT Opals are widespread within Miocene volcanic sequences in the North Shoa province of Central Ethiopia. The opal occurs as cavity fillings in a 5 m thick seam of glassy rhyolitic ignimbrite that is sandwiched between basaltic lava flows. The opals occur over a large area (&gt;25 km2). X-ray diffraction analyses show that they are CT-type. The opals contain lower concentrations of trace elements (up to 100 times) than the host rhyolite. Ratios of most trace elements are, however, similar in both the opals and rhyolites. The opals have high δ18O values (28.4–33.8‰) that imply a low t

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7

Alchapar, Noelia Liliana, Cláudia Cotrim Pezzuto, and Erica Norma Correa. "Parámetros urbanos morfo-materiales y su correlación con las temperaturas de aire en verano." Ambiente Construído 18, no. 4 (2018): 199–213. http://dx.doi.org/10.1590/s1678-86212018000400301.

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Resumen Con el objetivo de determinar y comparar la eficiencia de diversas estrategias de enfriamiento urbano en dos ciudades Latinoamericanas (Mendoza, Argentina y Campinas, Brasil) fueron analizados 18 escenarios que modifican su porcentaje de vegetación y nivel de albedo en materiales opacos de la envolvente urbana. Los escenarios fueron simulados con un modelo de alta resolución microclimática - ENVI-met 3.1. Mediante el Análisis de Componentes Principales se evaluaron las posibles asociaciones entre variables. Como resultado se observó que el porcentaje de vegetación y el albedo medio de

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8

López Acosta, Pedro, and José Miguel Medina-Cazorla. "Novedades corológicas para Almería: el género Acer L. en la sierra de Los Filabres." Acta Botanica Malacitana 31 (December 1, 2006): 183–85. http://dx.doi.org/10.24310/abm.v31i31.7147.

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New chorological records for Almería: the genus Acer L. in Los Filabres mountain rangePalabras clave. Acer monspessulanum, Acer opalus subsp. granatense, flora, conservación, Almería.Key words. Acer monspessulanum, Acer opalus subsp. granatense, flora, conservation, Almeria

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9

Hung, Pei-Sung, Guang-Ren Wang, Wei-An Chung, Tze-Ting Chiang, and Pu-Wei Wu. "Green Synthesis of Ni@PEDOT and Ni@PEDOT/Au (Core@Shell) Inverse Opals for Simultaneous Detection of Ascorbic Acid, Dopamine, and Uric Acid." Nanomaterials 10, no. 9 (2020): 1722. http://dx.doi.org/10.3390/nano10091722.

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We demonstrate a water-based synthetic route to fabricate composite inverse opals for simultaneous detection of ascorbic acid (AA), dopamine (DA), and uric acid (UA). Our process involves the conformal deposition of poly(3,4-ethylenedioxythiophene) (PEDOT) and PEDOT/Au on the skeletons of Ni inverse opals via cyclic voltammetric scans (CV) to initiate the electropolymerization of 3,4-ethylenedioxythiophene (EDOT) monomers. The resulting samples, Ni@PEDOT, and Ni@PEDOT/Au inverse opals, exhibit a three-dimensional ordered macroporous platform with a large surface area and interconnected pore ch

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10

Rondeau, Benjamin, Emmanuel Fritsch, Michel Guiraud, and Christophe Renac. "Opals from Slovakia ("Hungarian" opals): a re-assessment of the conditions of formation." European Journal of Mineralogy 16, no. 5 (2004): 789–99. http://dx.doi.org/10.1127/0935-1221/2004/0016-0789.

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11

Ghisoli, C., F. Caucia, and L. Marinoni. "XRPD patterns of opals: A brief review and new results from recent studies." Powder Diffraction 25, no. 3 (2010): 274–82. http://dx.doi.org/10.1154/1.3478554.

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A new classification of opals through X-ray powder diffraction (XRPD) methodology, by analysing 75 new samples of opal came from different worldwide areas, is introduced. A brief historical summary of the application of XRPD analysis on opals and the most important XRPD results reported in literature were compared with the newly obtained XRPD data. A simple method for the classification of opals on the basis of their degrees of structural order-disorder calculated from the diffraction data is proposed. In addition, a clear boundary, which has not been previously described by others in literatu

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12

Fu, Ming, Ji Zhou, Bo Li, Qun Fang Xiao, Yue Hui Wang, and Long Tu Li. "Optical Properties of Nanocrystalline Ag Doped Silica Inverse Opals." Key Engineering Materials 336-338 (April 2007): 555–57. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.555.

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Nanocrystalline Ag doped silica inverse opals were prepared by a sol-gel chemistry method via templating of polystyrene colloidal crystals. The ordered structures of colloidal crystal templates and inverse opals are characterized by scanning electron microscopy. Ag nanocrystals size is estimated as 20~30nm by Scherrer Formula from X-ray diffraction. The color and the stop band of the inverse opals are characterized by transmission spectrum. And five emission peaks of the nanocrystalline silver clusters are observed from fluorescence spectrum.

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13

Hung, Pei-Sung, Chen-Hong Liao, Bo-Han Huang, Wei-An Chung, Shou-Yi Chang, and Pu-Wei Wu. "Formation of Free-Standing Inverse Opals with Gradient Pores." Nanomaterials 10, no. 10 (2020): 1923. http://dx.doi.org/10.3390/nano10101923.

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We demonstrate the fabrication of free-standing inverse opals with gradient pores via a combination of electrophoresis and electroplating techniques. Our processing scheme starts with the preparation of multilayer colloidal crystals by conducting sequential electrophoresis with polystyrene (PS) microspheres in different sizes (300, 600, and 1000 nm). The critical factors affecting the stacking of individual colloidal crystals are discussed and relevant electrophoresis parameters are identified so the larger PS microspheres are assembled successively atop of smaller ones in an orderly manner. I

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14

Aseeva, Anna Valer`evna, Sergei Viktorovich Vysotskiy, Konstantin Nickolaevich Galkin, Kseniya Yur`evna Bushkareva, Alexander Alexandrovich Karabtsov, and Andrew Sergeevich Okrugin. "Fibrous Noble Opals: Electron and Atomic-Force Microscopy and Spectrometry Data." Solid State Phenomena 213 (March 2014): 109–13. http://dx.doi.org/10.4028/www.scientific.net/ssp.213.109.

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The work deals with results of study of hydrothermal noble opals. It has been established that hydrothermal opals are composed of multiple clusters: chaotic packs, fibers and grid layers. An effect of the water saturation coefficient on the opal optical properties was considered.

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15

Cheng, Tsung O. "OPALS Study." Annals of Emergency Medicine 33, no. 2 (1999): 241. http://dx.doi.org/10.1016/s0196-0644(99)70403-8.

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Hu, Z., X. Lu, and J. Gao. "Hydrogel Opals." Advanced Materials 13, no. 22 (2001): 1708–12. http://dx.doi.org/10.1002/1521-4095(200111)13:22<1708::aid-adma1708>3.0.co;2-l.

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17

Cheng, Gong, Hangjun Wu, Zhengwen Yang, et al. "Upconversion emission properties of CeO2: Tm3+, Yb3+ inverse opal photonic crystals." Modern Physics Letters B 28, no. 27 (2014): 1450218. http://dx.doi.org/10.1142/s0217984914502182.

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The ordered and disordered templates were assembled by vertical deposition of polystyrene microspheres. The CeO 2: Tm 3+, Yb 3+ precursor solution was used to infiltrate into the voids of the ordered and disordered templates, respectively. Then the ordered and disordered templates were calcined at 950°C in an air furnace, and the CeO 2: Tm 3+, Yb 3+ inverse opals were obtained. The upconversion emissions from CeO 2: Tm 3+, Yb 3+ inverse opals were suppressed due to the photon trapping caused by Bragg reflection of lattice planes when the upconversion emission band was in the range of the photo

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18

Marques, Gisele Tavares, Marcondes Lima da Costa, and Érico Rodrigues Gomes. "Orange opals from Buriti dos Montes, Piauí: solid inclusions as genetic guides." Rem: Revista Escola de Minas 68, no. 1 (2015): 53–59. http://dx.doi.org/10.1590/0370-44672015680203.

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Orange opals from Buriti dos Montes (Piauí, northeastern Brazil) have gemological properties that favor their use as jewelry; these characteristics include their colors, transparency, relatively high stability and hardness. The exotic content of solid inclusions provides greater beauty to the opals of this region. These opals originated from hydrothermal processes and are found mainly as veinlets and veins in the sandstones of the Serra Grande Group, sectioned by diabase dikes and sills of the Sardinha Formation. Solid inclusions, such as bubbles, botryoidal aggregates, dendrites, and nodules,

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19

Zhang, Hui, Xiao Long Xu, Fan Li, Bin Bin Jin, and Su Ling Zhao. "Influencing Factors of Macrosporous Ordering in TiO₂ and ZrO₂ Inverse Opals." Key Engineering Materials 544 (March 2013): 209–12. http://dx.doi.org/10.4028/www.scientific.net/kem.544.209.

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TiO2 inverse opals, as well as used as photonic crystals, can be applied to the dye sensitized solar cells (DSSC), photocatalysis, and so on. In above applications, ordering of pore arrangement in TiO2 inverse opal is crucial as it determines the application effect of TiO2 inverse opal. In this paper, TiO2 inverse opals were prepared by infiltrating and removing of polystyrene (PS) colloidal crystal templates. Using scanning electron microscope (SEM), it is found that the pore structure of inverse opals can be tuned by using different heating temperature and different size of PS spheres, and o

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20

Kast, Richard E., Marc-Eric Halatsch, and Rafael Rosell. "OPALS: A New Osimertinib Adjunctive Treatment of Lung Adenocarcinoma or Glioblastoma Using Five Repurposed Drugs." Cells 10, no. 5 (2021): 1148. http://dx.doi.org/10.3390/cells10051148.

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Background: Pharmacological targeting aberrant activation of epidermal growth factor receptor tyrosine kinase signaling is an established approach to treating lung adenocarcinoma. Osimertinib is a tyrosine kinase approved and effective in treating lung adenocarcinomas that have one of several common activating mutations in epidermal growth factor receptor. The emergence of resistance to osimertinib after a year or two is the rule. We developed a five-drug adjuvant regimen designed to increase osimertinib’s growth inhibition and thereby delay the development of resistance. Areas of Uncertainty:

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21

Yan, Wei, Qi-Qi Dong, Li-Ning Sun, Wei Deng, and Shaoping Wu. "Synthesis of Polypyrrole Inverse Opal in [bmim]PF6-Containing Acetonitrile and the Application of the Inverse Opal in Cell Prototype." Journal of Nanomaterials 2013 (2013): 1–11. http://dx.doi.org/10.1155/2013/426983.

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Most primary cells use Zn or Li as the anode, a metallic oxide as the cathode, and an acidic or alkaline solution or moist past as the electrolytic solution. In this paper, highly ordered polypyrrole (PPy) inverse opals have been successfully synthesized in the acetonitrile solution containing [bmim]PF6. PPy films were prepared under the same experimental conditions. Cyclic voltammograms of the PPy film and the PPy inverse opal in neutral phosphate buffer solution (PBS) were recorded. X-ray photoelectron spectroscopy technique was used to investigate the structural surface of the PPy films and

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22

Lange, Birger, Rudolf Zentel, Christopher Ober, and Seth Marder. "Photoprocessable Polymer Opals." Chemistry of Materials 16, no. 25 (2004): 5286–92. http://dx.doi.org/10.1021/cm048834u.

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Sussman, Jason, David Snoswell, Andreas Kontogeorgos, Jeremy J. Baumberg, and Peter Spahn. "Thermochromic polymer opals." Applied Physics Letters 95, no. 17 (2009): 173116. http://dx.doi.org/10.1063/1.3256193.

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Kim, Sunghwan, Alexander N. Mitropoulos, Joshua D. Spitzberg, Hu Tao, David L. Kaplan, and Fiorenzo G. Omenetto. "Silk inverse opals." Nature Photonics 6, no. 12 (2012): 818–23. http://dx.doi.org/10.1038/nphoton.2012.264.

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Stockton, Carol M. "Illustrious Opals Series." Journal of Gemmology 37, no. 3 (2020): 229. http://dx.doi.org/10.15506/jog.2020.37.3.229.

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Ni, P., P. Dong, B. Cheng, X. Li, and D. Zhang. "Synthetic SiO2 Opals." Advanced Materials 13, no. 6 (2001): 437–41. http://dx.doi.org/10.1002/1521-4095(200103)13:6<437::aid-adma437>3.0.co;2-8.

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Ibisate, Marta, Dolores Golmayo, and Cefe López. "Silicon Direct Opals." Advanced Materials 21, no. 28 (2009): 2899–902. http://dx.doi.org/10.1002/adma.200900188.

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Sanders, J. V. "STRUCTURE OF OPALS." Le Journal de Physique Colloques 46, no. C3 (1985): C3–1—C3–8. http://dx.doi.org/10.1051/jphyscol:1985301.

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Gupta, Amita, Alexei Yu Ganin, Parmanand Sharma, et al. "Synthetic magnetic opals." Pramana 58, no. 5-6 (2002): 1051–59. http://dx.doi.org/10.1007/s12043-002-0216-z.

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Kredel, Julia, Christian Dietz, and Markus Gallei. "Fluoropolymer-Containing Opals and Inverse Opals by Melt-Shear Organization." Molecules 24, no. 2 (2019): 333. http://dx.doi.org/10.3390/molecules24020333.

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The preparation of highly ordered colloidal architectures has attracted significant attention and is a rapidly growing field for various applications, e.g., sensors, absorbers, and membranes. A promising technique for the preparation of elastomeric inverse opal films relies on tailored core/shell particle architectures and application of the so-called melt-shear organization technique. Within the present work, a convenient route for the preparation of core/shell particles featuring highly fluorinated shell materials as building blocks is described. As particle core materials, both organic or i

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Turanov, Alexander N., Vasilii K. Karandashev, Nadezhda S. Sukhinina, Vladimir M. Masalov, Andrey A. Zhokhov, and Gennadi A. Emelchenko. "A novel sorbent for lanthanide adsorption based on tetraoctyldiglycolamide, modified carbon inverse opals." RSC Advances 5, no. 1 (2015): 529–35. http://dx.doi.org/10.1039/c4ra11999a.

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Yang, Y. Q., P. D. Han, Y. P. Li, et al. "Fabrication and Optical Properties of Nb₂O₅ Inverse Opal Photonic Crystals by PS Opal Template." Materials Science Forum 688 (June 2011): 90–94. http://dx.doi.org/10.4028/www.scientific.net/msf.688.90.

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In this paper, polystyrene (PS) opals template, opal with a closed-packed face centered cubic (fcc) lattice, was prepared using vertical deposition method. The template provided void space for infiltration of Nb2O5 etc. PS colloidal nanospheres was face-centered-cubic (FCC) structure with its (111) planes parallel to the substrate. Finally, the transfer matrix method (TMM) was used to calculate photonic band-gap of PS opal and Nb2O5 inverse opal structure. The calculation results show that the photonic band-gap of Nb2O5 with inverse opal structure is wider than that of PS opals.

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Coll, Arnau, Sandra Bermejo, David Hernández, and Luís Castañer. "Al2O3/TiO2 inverse opals from electrosprayed self-assembled templates." Beilstein Journal of Nanotechnology 9 (January 19, 2018): 216–23. http://dx.doi.org/10.3762/bjnano.9.23.

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The fabrication of high optical quality inverse opals is challenging, requiring large size, three-dimensional ordered layers of high dielectric constant ratio. In this article, alumina/TiO2–air inverse opals with a 98.2% reflectivity peak at 798 nm having an area of 2 cm2 and a thickness of 17 µm are achieved using a sacrificial self-assembled structure of large thickness, which was produced with minimum fabrication errors by means of an electrospray technique. Using alumina as the first supporting layer enables the deposition of TiO2 at a higher temperature, therefore providing better optical

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Chen Wei, Wang Ming, and Ni Hai-Bin. "Fabrication of cylindrical opals and inverse opals and their optical properties." Acta Physica Sinica 62, no. 11 (2013): 114207. http://dx.doi.org/10.7498/aps.62.114207.

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Blazius, Carina Maccari, Ana Lígia Papst De Abreu, and Andrea Murillo Betioli. "Sistema de Vedação Vertical em Fachada Ventilada Opaca: estudo de caso sobre empreendimentos brasileiros." Revista Vértices 22, no. 3 (2020): 610–25. http://dx.doi.org/10.19180/1809-2667.v22n32020p610-625.

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A fachada ventilada é um sistema construtivo que promove vantagens como agilidade na execução, alta produtividade, redução das etapas de controle de recebimento de materiais e de produção, entre outros. O Brasil não possui normas prescritivas sobre a construção de fachada ventilada opaca, contudo a NBR 15.575 pode ser aplicada para avaliação do desempenho de edifícios de uso residencial. Este artigo tem como objetivo organizar informações do sistema de construção de fachadas ventiladas opacas, contribuindo para a disseminação do uso dessa tecnologia no Brasil. O método adotado foi a pesquisa d

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Nga, Pham Thu, Vu Duc Chinh, Nguyen Xuan Nghia, et al. "EXPERIMENTAL STUDY OF 3D SELF-ASSEMBLED PHOTONIC CRYSTALS AND COLLOIDAL CORE-SHELL SEMICONDUCTOR QUANTUM DOTS." ASEAN Journal on Science and Technology for Development 24, no. 1&2 (2017): 161–70. http://dx.doi.org/10.29037/ajstd.202.

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In this contribution we present an experimental study of 3D opal photonic crystals. The samples are opals constituted by colloidal silica spheres, realized with self-assembly technique. The sphere diameter is selected in order to obtain coupling of the photonic band gap with the emission from CdSe/ZnS colloidal quantum dots. The quantum dots infiltrated in the opals is expected to be enhanced or suppressed depending on the detection angle from the photonic crystal. The structural and optical characterization of the SiO2 opal photonic crystals are performed by field-emission scanning electron m

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Matamoros-Ambrocio, Mayra, Enrique Sánchez-Mora, Estela Gómez-Barojas, and José Alberto Luna-López. "Synthesis and Study of the Optical Properties of PMMA Microspheres and Opals." Polymers 13, no. 13 (2021): 2171. http://dx.doi.org/10.3390/polym13132171.

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Polymethylmethacrylate (PMMA) microspheres were synthesized by surfactant-free emulsion polymerization. These microspheres were used to obtain opals by the self-assembly method. Monomer and initiator quantities were varied systematically to monitor the size of PMMA microspheres. From SEM and DLS measurements, a trend was observed showing as the monomer and initiator amounts increased the average diameter of PMMA microspheres increased except when a minimum monomer amount was reached, for which the size of the microspheres remained practically constant. Diffuse reflectance spectra were processe

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Lytle, Justin C., Julian M. Banbury, Rebekah A. Blakney, et al. "The preparation and properties of carbon inverse opal papers using carbon fiber sheets as a framework." Journal of Materials Chemistry A 4, no. 9 (2016): 3494–503. http://dx.doi.org/10.1039/c5ta08433d.

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Ling, Cheng, Ming Fu, Haiyan Sun, et al. "Photonic band gaps and plasmonic behavior of Ag inverse opals with different Ag filling fractions prepared by electrochemical etching." RSC Advances 6, no. 51 (2016): 45835–39. http://dx.doi.org/10.1039/c6ra07074d.

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Fathonah, Ira Maya, Nugroho Budi Wibowo, and Yoshaphat Sumardi. "Identifikasi Jalur Sesar Opak Berdasarkan Analisis Data Anomali Medan Magnet dan Geologi Regional Yogyakarta." INDONESIAN JOURNAL OF APPLIED PHYSICS 4, no. 02 (2017): 192. http://dx.doi.org/10.13057/ijap.v4i02.4990.

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<p>This research was aimed to know the magnetic field anomaly pattern upon Opak’s fault, to identify the direction of Opak’s fault and the structure of Opak’s fault based on Geomagnetic data. It was conducted in the vicinity of Opak’s fault in Pundong sub-district, Yogyakarta. It used magnetic method which is based on rocks magnetic susceptibility. The data were taken by G-856AX Proton Precision Magnetometer (PPM) using looping method. Data analysis was done using diurnal variation and IGRF correction, reduction to pole, upward continuation and under surface structure modelling. From mag

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Eckert, Jürgen, Olivier Gourdon, Dorrit E. Jacob, et al. "Ordering of water in opals with different microstructures." European Journal of Mineralogy 27, no. 2 (2015): 203–13. http://dx.doi.org/10.1127/ejm/2015/0027-2428.

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Fu, Ming, Ji Zhou, Rui Long Zong, Bo Li, and Long Tu Li. "Preparation and Characterization of Ordered Macroporous ZnO Films for Photonic Application." Key Engineering Materials 280-283 (February 2007): 569–72. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.569.

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Wide band-gap semiconductor ZnO film with ordered face-centered cubic (FCC) structure air holes was prepared by electrochemical process. The porous ZnO film was prepared in zinc nitrate aqueous solution, using the indium tin oxide (ITO) substrate covered with synthetic opals as cathode by potentiostatic method. In order to improve the filling ratio of ZnO in the opal interstices, various potentials were applied to control the deposition speeds. The porous ZnO film was characterized by X-ray diffraction and Scanning Electron Microscope and a photonic band gap at about 568nm was observed by micr

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LIAO, JIAYAN, ZHENGWEN YANG, HANGJUN WU, et al. "UPCONVERSION LUMINESCENCE ENHANCEMENT OF NaYF4:Yb3+, Er3+ NANOPARTICLES ON INVERSE OPAL SURFACE." Surface Review and Letters 21, no. 01 (2014): 1450017. http://dx.doi.org/10.1142/s0218625x14500176.

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LaPO 4 inverse opal photonic crystals with different photonic band gaps were fabricated by template-assisted method. The Yb 3+/ Er 3+ co-doped NaYF 4 nanoparticles were deposited on the surfaces of the inverse opals, and their up-conversion emission properties were investigated. The upconversion emissions of Yb 3+/ Er 3+ co-doped NaYF 4 nanoparticles on the inverse opal surfaces have been enhanced when the upconversion emission bands of the nanoparticles are in the range of photonic band gaps of the inverse opals, which is attributed to an efficient and selective reflection of photonic band ga

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McNulty, David, Victor Landgraf, and Sigita Trabesinger. "Simplifying the synthesis of carbon inverse opals." RSC Advances 10, no. 40 (2020): 24108–14. http://dx.doi.org/10.1039/d0ra03693e.

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Chu, Lin, Xueting Zhang, Wenbin Niu, et al. "Hollow silica opals/cellulose acetate nanocomposite films with structural colors for anti-counterfeiting of banknotes." Journal of Materials Chemistry C 7, no. 24 (2019): 7411–17. http://dx.doi.org/10.1039/c9tc01992h.

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Lova, Paola, Simone Congiu, Katia Sparnacci, et al. "Core–shell silica–rhodamine B nanosphere for synthetic opals: from fluorescence spectral redistribution to sensing." RSC Advances 10, no. 25 (2020): 14958–64. http://dx.doi.org/10.1039/d0ra02245d.

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Silson, Toni, and Marion Steele. "The OPALS many hats." ANZTLA EJournal, no. 36 (April 16, 2019): 14–16. http://dx.doi.org/10.31046/anztla.v0i36.1099.

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Meseguer, F., A. Blanco, H. Mı́guez, F. Garcı́a-Santamarı́a, M. Ibisate, and C. López. "Synthesis of inverse opals." Colloids and Surfaces A: Physicochemical and Engineering Aspects 202, no. 2-3 (2002): 281–90. http://dx.doi.org/10.1016/s0927-7757(01)01084-6.

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Marlow, Frank, Muldarisnur, Parvin Sharifi, Rainer Brinkmann, and Cecilia Mendive. "Opals: Status and Prospects." Angewandte Chemie International Edition 48, no. 34 (2009): 6212–33. http://dx.doi.org/10.1002/anie.200900210.

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Klein, Tony. "The ‘fire’ of opals." Europhysics News 46, no. 2 (2015): 15–16. http://dx.doi.org/10.1051/epn/2015201.

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