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Bibliografie tematiche / Silver copper iodide

Letteratura scientifica selezionata sul tema "Silver copper iodide"

Autore: Grafiati

Pubblicato: 8 giugno 2024

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Articoli di riviste sul tema "Silver copper iodide":

1

Sulistyarti, Hermin, Erwin Sulistyo, Sutrisno Sutrisno e Zuri Rismiarti. "Metode Spektrofotometri Secara Tidak Langsung untuk Penentuan Merkuri(II) berdasarkan Pembentukan Kompleks Biru Iodium-Amilum". ALCHEMY Jurnal Penelitian Kimia 15, n. 1 (1 marzo 2019): 149. http://dx.doi.org/10.20961/alchemy.15.1.15036.149-164.

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<p>Metode spektrofotometri secara tidak langsung telah dikembangkan untuk analisis merkuri(II) berdasarkan perbedaan absorbansi kompleks biru amilum-iodium antara larutan sampel yang mengandung ion merkuri(II) dan larutan blanko yang tidak mengandung ion merkuri(II) dalam sistem pereaksi yang berisi iodida, iodat dan amilum. Pada larutan blanko, semua ion iodida (I<sup>-</sup>) dalam sistem pereaksi dioksidasi oleh iodat menjadi iodium yang dengan adanya amilum membentuk kompleks biru iodium-amilum dan terdeteksi secara spektrofotometri pada 618 nm. Namun, bila sampel mengandung ion merkuri(II), maka sebagian ion iodida akan terikat oleh ion merkuri(II) dan membentuk kompleks tetraiodomerkurat(II), sehingga hanya sisa iodida yang dioksidasi oleh ion iodat menjadi iodium dan membentuk warna biru dengan absorbansi yang lebih rendah dibandingkan absorbansi larutan blanko. Hasil penelitian menunjukkan bahwa perbedaan absorbansi sebanding dengan konsentrasi iodida yang terikat pada ion merkuri(II) sehingga sebanding pula dengan konsentrasi merkuri(II) dalam sampel. Metode yang dikembangkan dioptimasi terhadap beberapa parameter kimia, antara lain konsentrasi larutan iodida, iodat, amilum, dan pH larutan dan pada kondisi optimum memberikan kisaran linier 1 – 9 mg L<sup>-1</sup> ion merkuri(II) dengan R<sup>2</sup> 0,9983, dengan LOD 0,44 mgL<sup>-1</sup>. Metode ini cukup selektif terhadap ion kobalt(II) dan timbal(II), namun ion tembaga(II) dan perak(I) mengganggu pengukuran. Metode ini telah divalidasi menggunakan metode adisi standar yang diaplikasikan ke dalam sampel limbah pertambangan emas dari Lombok dengan hasil yang memuaskan.</p><p><strong>Indirect Spectrophotometry for Mercury(II) Determination Based on The Formation of Blue Starch-Iodine Complex. </strong>Indirect spectrophotometric method for determining mercury(II) concentration has been successfully developed based on the difference of the absorbance of the blue starch-iodine complex in the absence and in the presence of mercury(II). In the absence of mercury(II), all iodide ions (I<sup>-</sup>) in the reagent system are oxidized by iodate to iodine, which in the presence of starch formed a clear blue complex of starch-iodine detected spectrophotometrically at 618 nm. However, if mercury presents in the sample, some of the iodide ions are bound to mercury(II) ion forming tetraiodomercurate(II) complex, and thus, only the remaining of iodide is oxidized by iodate to iodine resulting in lower absorbance of the blue color. The results showed that the delta absorbance was proportional to the concentration of iodide bound to mercury and thus proportional to mercury(II) concentration. To achieve the sensitivity, the method was optimized to the main chemical parameters, such as the concentration of iodide, iodine, iodate, starch, and pH solution. Selectivity of the method was also studied by investigating the effect of interfering ions of copper(II), cobalt (II), lead(II), and silver (I). Under these optimum conditions, the method showed linearity measurements from 1 – 9 mg L<sup>-1</sup> mercury(II) with correlation (R<sup>2</sup>) of 0.996. The method was also successfully applied to determine mercury(II) from small-scale gold mining tailing waste from West Lombok, Indonesia and is prospective for analysis of mercury(II) in mining waste.</p>

2

Cha, Ji-Hyun, e Duk-Young Jung. "Air-Stable Transparent Silver Iodide–Copper Iodide Heterojunction Diode". ACS Applied Materials & Interfaces 9, n. 50 (7 dicembre 2017): 43807–13. http://dx.doi.org/10.1021/acsami.7b14378.

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3

Nicholas, Aaron D., Francis H. Barnes, Daniel R. Adams, Matthew S. Webber, Matthew A. Sturner, Matthew D. Kessler, David A. Welch, Robert D. Pike e Howard H. Patterson. "Understanding the vapochromic response of mixed copper(i) iodide/silver(i) Iodide nanoparticles toward dimethyl sulfide". Physical Chemistry Chemical Physics 22, n. 20 (2020): 11296–306. http://dx.doi.org/10.1039/d0cp00504e.

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4

Costa, Leonor, Margarida Nunes, Sónia Costa, Milene Trindade, Catarina Miguel e Teresa Ferreira. "Unveiling the Ambrotype: Characterization of Two 19th Century Photographs". Microscopy and Microanalysis 25, n. 1 (2 agosto 2018): 203–13. http://dx.doi.org/10.1017/s1431927618000429.

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Abstract (sommario):

AbstractThis work used a multi-analytical approach to characterize two 19th century ambrotypes and was motivated by the lack of insight on these historical objects. Photographic imaging and optical microscopy (OM) were used to identify abrasions, cracks related to reticulation, tarnishing, and other aspects associated to production and degradation processes. With variable pressure scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (EDS) these processes were seen with great detail and further characterized. Elemental point analysis and elemental mapping showed that the photosensitive material used was silver iodide. Degradation compounds were found as silver and chlorine-containing compounds. In one of the items, the tarnishing area also contained redeposited silver in a ring-shape surrounding a nucleus rich in silver, copper, and sulfur, in addition to copper-based salts. EDS analyses also identified that the supports were common soda–lime–silica glasses, refined with arsenic; and showed that a pigment rich in iron was used in both items to hand color the cheeks, extended with aluminum silicates alone or mixed with barium sulfate. Theμ-Raman study pointed out that a synthetic Mars pigment was employed.μ-Fourier-transform infrared spectroscopy analyses identified collodion as the binder. Shellac was used as a protective varnish in one of the items and a gum was possibly employed on the other. Bitumen was used for the background in one ambrotype.

5

Mohamed Saheed, Mohamed Salleh, Norani Muti Mohamed, Balbir Singh Mahinder Singh, Mohamed Shuaib Mohamed Saheed e Rajan Jose. "Optoelectronic Enhancement of Perovskite Solar Cells through the Incorporation of Plasmonic Particles". Micromachines 13, n. 7 (25 giugno 2022): 999. http://dx.doi.org/10.3390/mi13070999.

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The optoelectronic advantages of anchoring plasmonic silver and copper particles and non-plasmonic titanium particles onto zinc oxide (ZnO) nanoflower (NF) scaffolds for the fabrication of perovskite solar cells (PSCs) are addressed in this article. The metallic particles were sputter-deposited as a function of sputtering time to vary their size on solution-grown ZnO NFs on which methylammonium lead iodide perovskite was crystallized in a controlled environment. Optical absorption measurements showed impressive improvements in the light-harvesting efficiency (LHE) of the devices using silver nanoparticles and some concentrations of copper, whereas the LHE was relatively lower in devices used titanium than in a control device without any metallic particles. Fully functional PSCs were fabricated using the plasmonic and non-plasmonic metallic film-decorated ZnO NFs. Several fold enhancements in photoconversion efficiency were achieved in the silver-containing devices compared with the control device, which was accompanied by an increase in the photocurrent density, photovoltage, and fill factor. To understand the plasmonic effects in the photoanode, the LHE, photo-current density, photovoltage, photoluminescence, incident photon-to-current conversion efficiency, and electrochemical impedance properties were thoroughly investigated. This research showcases the efficacy of the addition of plasmonic particles onto photo anodes, which leads to improved light scattering, better charge separation, and reduced electron–hole recombination rate.

6

McKeage, Mark J., Peter Papathanasiou, Geoffrey Salem, Allan Sjaarda, Gerhard F. Swiegers, Paul Waring e S. Bruce Wild. "Antitumor Activity of Gold(I), Silver(I) and Copper(I) Complexes Containing Chiral Tertiary Phosphines". Metal-Based Drugs 5, n. 4 (1 gennaio 1998): 217–23. http://dx.doi.org/10.1155/mbd.1998.217.

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The in vitro cytotoxicities of a number of gold(I), silver(I) and copper(I) complexes containing chiral tertiary phosphine ligands have been examined against the mouse tumour cell lines P815 mastocytoma, B16 melanoma [gold(I) and silver(I) compounds] and P388 leukaemia [gold(I) complexes only] with many of the complexes having IC50 values comparable to that of the reference compounds cis-diamminedichloroplatinum(ll), cisplatin, and bis[1,2-bis(diphenylphosphino) ethane]gold(I) iodide. The chiral tertiary phosphine ligands used in this study include (R)-(2-aminophenyl)methylphenylphosphine; (R,R)-, (S,S)- and (R*,R*)-1,2-phenylenebis(methylphenylphosphine); and (R,R)-, (S,S)- and (R*,R*)-bis{(2-diphenylphosphinoethyl)phenylphosphino}ethane. The in vitro cytotoxicities of gold(I) and silver(I) complexes containing the optically active forms of the tetra(tertiary phosphine) have also been examined against the human ovarian carcinoma cell lines 41M and CH1, and the cisplatin resistant 41McisR, CH1cisR and SKOV-3 tumour models. IC50 values in the range 0.01 - 0.04 μM were determined for the most active compounds, silver(I) complexes of the tetra(tertiary phosphine). Furthermore, the chirality of the ligand appeared to have little effect on the overall activity of the complexes: similar IC50 data were obtained for complexes of a particular metal ion with each of the stereoisomeric forms of a specific ligand.

7

Stafford, A. J., M. Silbert, J. Trullas e A. Giro. "Potentials and correlation functions for the copper halide and silver iodide melts. I. Static correlations". Journal of Physics: Condensed Matter 2, n. 31 (6 agosto 1990): 6631–41. http://dx.doi.org/10.1088/0953-8984/2/31/016.

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8

Friesel, Milan, Bogdan Baranowski e Arnold Lunden. "Phase transitions of the system silver mercury iodide (Ag2HgI4)-copper mercury iodide (Cu2HgI4) at normal and high pressure studied by differential scanning calorimetry". Journal of Physical Chemistry 94, n. 3 (8 febbraio 1990): 1113–17. http://dx.doi.org/10.1021/j100366a019.

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9

Gallyas, F., e J. R. Wolff. "Metal-catalyzed oxidation renders silver intensification selective. Applications for the histochemistry of diaminobenzidine and neurofibrillary changes." Journal of Histochemistry & Cytochemistry 34, n. 12 (dicembre 1986): 1667–72. http://dx.doi.org/10.1177/34.12.3537114.

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Physical developers can increase the visibility of end products of certain histochemical reactions, such as oxidative polymerization of diaminobenzidine and selective binding of complex silver iodide ions to Alzheimer's neurofibrillary changes. Unfortunately, this intensification by silver coating is generally superimposed on a nonspecific staining originating from the argyrophil III reaction, which also takes place when tissue sections are treated with physical developers. The present study reveals that the argyrophil III reaction can be suppressed when tissue sections are treated with certain metal ions and hydrogen peroxide before they are transferred to the physical developer. The selective intensification of Alzheimer's neurofibrillary changes requires a pre-treatment with lanthanum nitrate (10 mM/liter) and 3% hydrogen peroxide for 1 hr. The diaminobenzidine reaction can be selectively intensified when physical development is preceded by consecutive treatments with copper sulfate (10 mM/liter, pH 5, 10 min) and hydrogen peroxide (3%, pH 7, 10 min). In peroxidase histochemistry, this high-grade intensification may help to increase specificity and reduce the threshold of detectability in tracing neurons with horseradish peroxidase or in immunohistochemistry when the peroxidase-antiperoxidase method is used.

10

Komljenović, Josipa, Vanja Martinac e Njegomir Radić. "Ion-sensitive behaviour of silver sulphide-based solid-state copper(II) and iodide electrodes in partially aqueous systems". Analytica Chimica Acta 231 (1990): 137–41. http://dx.doi.org/10.1016/s0003-2670(00)86409-0.

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Più fonti

Tesi sul tema "Silver copper iodide":

1

Madkhali, Osama. "Structural, optical and electrical properties of copper and silver-copper iodide thin films". Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0253.

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Dans cette thèse, nous avons étudié la formation de couches minces d'iodure de cuivre (CuI) et d'iodure de cuivre argent (Ag,Cu)I à partir d'une procédure en deux étapes : dépôt d'un film métallique par pulvérisation magnétron et ioduration dans de la vapeur d'iode. De nombreuses techniques ont été utilisées pour déterminer les propriétés des films telles que : diffraction des rayons X, microscopie électronique à transmission, effet Hall, spectroscopie UV-visible… Pour les films CuI, nous avons obtenu des films semi- conducteurs transparents de type p cristallisant dans une structure type γ-CuI avec une large bande interdite (≈ 3,05 eV). Les films d'iodure de cuivre croissent avec une forte orientation préférentielle le long de la direction [111]. La microscopie électronique à transmission (MET) et la diffraction électronique à zone sélectionnée (SAED) ont révélé des mâcles dans les cristaux CuI, révélant leur géométrie et leur orientation. Les films sont hautement conducteurs, optiquement transparents et présentent une valeur élevée de facteur de mérite. Les propriétés des couches minces (Ag,Cu)I ont été étudiées selon les mêmes méthodes en fonction de la teneur en argent. Ces films peuvent être de type p ou de type n, en fonction de la concentration en Ag. Néanmoins, aucun changement structural n'a été mis en évidence par XRD. La morphologie de la surface du film dépend également fortement de la teneur en argent. Le gap optique peut être contrôlé par l'ajout progressif d'argent. Il en est de même pour l'énergie d'activation des phénomènes de conduction électrique. La photoluminescence a montré l’évolution entre les films pauvres en argent et les riches. Une corrélation entre les résultats optiques et électriques a été établie et a mis en évidence l'origine du comportement électrique. Il est proposé que la présence d'Ag dans les films minces (Ag,Cu)I favorise la formation des lacunes d’iode, qui agissent comme un défaut de type donneur, et qui éventuellement, conduisent à la changement de la nature des porteurs
In this thesis, we study the formation of copper iodide (CuI) and silver copper iodide (Ag,Cu)I thin films from a two-step procedure: deposition of a metallic film by magnetron sputtering and iodination in iodine vapor. Numerous techniques have been used to determine the films properties such as: X-ray diffraction, transmission electron microscopy, Hall effect, UV-visible spectroscopy… For CuI films, we obtained transparent p-type semiconductors films crystallizing in the γ-phase with wide bandgap (Eg ≈ 3.05 eV). Copper iodide films grow with a strong preferred orientation along the [111] direction. SEM analysis of thin film morphology demonstrates that iodination conditions can affect crystal size. Transmission electron microscopy (TEM) and selected area electron diffraction (SAED) have revealed crystallographic twin domains in CuI crystals, revealing their geometry and orientation. The films are highly conductive, optically transparent and exhibit high value of figure of merit. The properties of (Ag,Cu)I thin films have been studied using the same methods as a function of the silver content. (Ag,Cu)I films can be either p-type or n-type, depending on Ag concentration. Nevertheless, no structural change has been evidenced by XRD. The optical band gap can be monitor by the progressive addition of silver. The same is true for the electrical activation energy. In addition, the PL results showed a tendency of the PL spectral features of CuI to be changed to those of AgI with the increase of the silver content. A correlation between the optical and electrical results was established and evidenced the origin of the electrical behaviour. It is proposed that presence of Ag in (Ag,Cu)I thin films promotes the formation of the I-vacancies, which act as donor type defect, and eventually, with increasing the Ag content, crossover the carriers from p-type to n-type occurs

2

Sansom, H. C. "Copper and silver bismuth iodide semiconductors as potential solar cell absorber materials". Thesis, University of Liverpool, 2018. http://livrepository.liverpool.ac.uk/3028034/.

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3

Blades, William H. "Electronic Structure and Stability of Ligated Superatoms and Bimetallic Clusters". VCU Scholars Compass, 2016. http://scholarscompass.vcu.edu/etd/4292.

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Quantum confinement in small metal clusters leads to a bunching of states into electronic shells reminiscent of shells in atoms. The addition of ligands can tune the valence electron count and electron distribution in metal clusters. A combined experimental and theoretical study of the reactivity of methanol with AlnIm− clusters reveals that ligands can enhance the stability of clusters. In some cases the electronegative ligand may perturb the charge density of the metallic core generating active sites that can lead to the etching of the cluster. Also, an investigation is conducted to understand how the bonding scheme of a magnetic dopant evolves as the electronic structure of the host material is varied. By considering VCun+, VAgn+, and VAun+ clusters, we find that the electronic and atomic structure of the cluster plays a major role in determining how an impurity will couple to its surroundings.

Capitoli di libri sul tema "Silver copper iodide":

1

Root, Douglas D., e Kuan Wang. "Copper Iodide Staining of Proteins and Its Silver Enhancement". In Springer Protocols Handbooks, 723–28. Totowa, NJ: Humana Press, 2009. http://dx.doi.org/10.1007/978-1-59745-198-7_72.

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2

"Silver Iodate". In Copper and Silver Halates, 164–235. Elsevier, 1990. http://dx.doi.org/10.1016/b978-0-08-029208-3.50011-0.

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3

"Copper (II) Iodate". In Copper and Silver Halates, 4–60. Elsevier, 1990. http://dx.doi.org/10.1016/b978-0-08-029208-3.50008-0.

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4

AWANO, TERUYOSHI, e TOSHIHARU TAKAHASHI. "MILLIMETER WAVE ABSORPTION BANDS OF SILVER/COPPER IODIDES-PHOSPHATE GLASSES". In Solid State Ionics, 569–76. WORLD SCIENTIFIC, 2012. http://dx.doi.org/10.1142/9789814415040_0068.

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5

Lambert, Tristan H. "Functional Group Interconversion". In Organic Synthesis. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780190200794.003.0004.

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Chaozhong Li of the Shanghai Institute of Organic Chemistry reported (J. Am. Chem. Soc. 2012, 134, 10401) the silver nitrate catalyzed decarboxylative fluorination of carboxylic acids, which shows interesting chemoselectivity in substrates such as 1. A related decarboxylative chlorination was also reported by Li (J. Am. Chem. Soc. 2012, 134, 4258). Masahito Ochiai at the University of Tokushima has developed (Chem. Commun. 2012, 48, 982) an iodobenzene-catalyzed Hofmann rearrangement (e.g., 3 to 4) that proceeds via hypervalent iodine intermediates. The dehydrating agent T3P (propylphosphonic anhydride), an increasingly popular reagent for acylation chemistry, has been used (Tetrahedron Lett. 2012, 53, 1406) by Vommina Sureshbabu at Bangalore University to convert amino or peptide acids such as 5 to the corresponding thioacids with sodium sulfide. Jianqing Li and co-workers at Bristol-Myers Squibb have shown (Org. Lett. 2012, 14, 214) that trimethylaluminum, which has long been known to effect the direct amidation of esters, can also achieve the direct coupling of acids and amines, such as in the preparation of amide 8. The propensity of severely hindered 2,2,6,6-tetramethylpiperidine (TMP) amides such as 9 to undergo solvolysis at room temperature has been shown (Angew. Chem. Int. Ed. 2012, 51, 548) by Guy Lloyd-Jones and Kevin Booker-Milburn at the University of Bristol. The reaction proceeds by way of the ketene and is enabled by sterically induced destabilization of the usual conformation that allows conjugation of the nitrogen lone pair with the carbonyl. Matthias Beller at Universität Rostock has found (Angew. Chem. Int. Ed. 2012, 51, 3905) that primary amides may be transamidated via copper(II) catalysis. The conditions are mild enough that an epimerization-prone amide such as 11 undergoes no observable racemization during conversion to amide 13. A photochemical transamidation has been achieved (Chem. Sci. 2012, 3, 405) by Christian Bochet at the University of Fribourg that utilizes 385-nm light to activate a dinitroindoline amide in the presence of amines such as 15, which produces the amide 16. Notably, photochemical cleavage of the Ddz protecting group occurs at a shorter wavelength of 300 nm.

Atti di convegni sul tema "Silver copper iodide":

1

Lefevre, Matthew, Emmanuel Noraz e Damien Veychard. "Repeatable Method for Automated Decapsulation of Silver Alloy Wire Packages". In ISTFA 2015. ASM International, 2015. http://dx.doi.org/10.31399/asm.cp.istfa2015p0491.

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Abstract Over the past several years there has been a large industry wide effort to change over from gold bonding wires to copper in order to minimize production costs. In certain cases this is not possible due to the relatively high hardness values of Cu [1], which leads to reliability issues in the manufacturing process. Silver (Ag) wire has been proposed and successfully implemented in many instances where Cu wire was not practicable. Unfortunately, currently integrated decapsulation methods severely damaged or destroyed the silver wires and bonds, making it impossible to perform production controls and failure analysis. In this article we present a reliable and repeatable automated method to expose these die and wire bonds. By adding a dilute iodine solution to the nitric acid in an acid decapsulator, these packages can be fully opened without degrading the silver wires, allowing both mechanical and electrical testing on these devices.

2

KWAK, A. "Application of Zinc-Silver Impregnated Activated Carbons in Removal of Lead(II) and Mercury(II) Compounds from Groundwater". In Quality Production Improvement and System Safety. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902691-9.

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Abstract. Nowadays activated carbon is a material generating great interest, as it is characterized by a vast surface area due to a high number of pores in its structure. Therefore, the main purpose behind its use is the filtration of impurities from air and water that can be adsorbed with high efficiency. Activated carbon can be easily modified as well. The paper describes activated carbon modification with copper-, manganese-, silver- and zinc salts. The effects of the selected impregnates and their concentrations were examined. The products included 5 adsorbent samples: four universal adsorbents, impregnated with all the above-mentioned salts, and one specific adsorbent sample, designed to adsorb lead(II) and mercury(II) ions and impregnated with zinc- and silver salts only. The premise was to obtain pure drinking water. Properties, such as bulk density, methylene blue number or iodine number were determined for the modified activated carbons. To test the efficiency of an improved adsorbent, an experiment with water highly contaminated with Pb(II) and Hg(II) was carried out, and its results revealed that absorption efficiency for these heavy metals exceeded 99.9%. The adsorber samples were also observed under a digital microscope to compare their appearance.