Silver photoluminescence

Eichelbaum M, Rademann K, Hoell A, Tatchev DM, Weigel W, Stosser R, Pacchioni G (2008) Photoluminescence of atomic gold and silver particles in soda-lime silicate glasses. Nanotechnology 19 135701... 

After growth to a larger size they cause fog." Experiments by Roth and Simpson (137) and by Corbin and associates (138) likewise support a stepwise formation of the sensitivity centers. Mumaw (139) observed photoluminescence peaks which he attributed to silver sulfide islands on the grain surface. 

The mechanistic route followed for the reduction process was different in the case of Ag/mycelium and Ag/media. In media, glucose was found mainly responsible for the reduction whereas in the case of mycelium, it was mainly the S-H group responsible for the same. The photoluminescence spectrum of these protein-stabilized silver nanoparticles also showed much enhanced fluorescence emission intensity. 

Gontijo I, Boroditsky M, Yablonovitch E, Keller S, Mishra U.K., DenBaars S.P. (1999) Coupling of InGaN quantum-well photoluminescence to silver surface plasmons Phy. Rev. B 60 11564-11567. 

Figure 19.5 Schematic diagram showing decomposition of total phosphorescence enhancement of PtOEP on silver films into absorption enhancement E X. ) and emissive rate enhancement E (%.2) based on the photophysical model described in the text and data from steady state and transient spectroscopy of PtOEP films with various thicknesses and excitation wavelengths as labeled. The lines represent the possible combinations that could explain the experimentally observed changes in photoluminescence where each position on the line represents a different choice of fQ, the fraction of the excited states that are quenched nonradiatively by interactions between the molecule and the metallic surface. The blue shaded region on the vertical axis is the range of possibilities allowed by constraints from extinction and excitation spectra as explained in the text. The dotted oval is what we believe to be the most likely decomposition for the 6 nm films characterized in Figure 19.4 as discussed in the text. Reprinted from reference 45 with permission of the American Chemical Society.

Figure 19.7 Fluorescence enhancement and spectral changes for conjugated polyelectrolyte emitters in structures like those depicted in Figure 19.6. (A) Enhancement of photoluminescence on top of nanotextured silver films and PAH/PSS polyelectrolyte bilayer spacers (structure I). (B) Normalized spectra of the silver extinction (solid squares) and emission spectra with no silver (solid circles) and with silver (open circles) using structure I and 13 bilayers. (C) Enhancement of photoluminescence for emitters in structure II. Reprinted from reference 48 with permission of the SPIE.

Figure 19.8 Photoluminescence enhancement of rhodamine monolayers covalently attached to glass with various amounts of nanotextured silver on top. (A) Extinction spectra of substrates with no silver (a) and increasing amounts of silver from (b) to (e). (B) Resulting photoluminescence from these subtrates for excitation at 450 nm. Reprinted from reference 49 with permission of the American Chemical Society.

Properties Light-pink, rose-red, brownish-red, or brown mineral white streak vitreous to pearly luster photoluminescent. Found in veins with ores of silver, lead, copper manganese. D 3.3-3.6, Mohs hardness 3-4. 

S.M. Kanan, C.P. Tripp, R.N. Austin and H.H. Patterson, Photoluminescence and raman spectroscopy as probes to investigate silver and gold dicyanide clusters doped in A-type zeolite and their photoassisted degradation of Carbary 1, J. Phys. Chem. B, 105, p.9441 (2001). 

These biopolymers can be used for the immobilization of metal ions not only with the final objective of metal recovery (and subsequent valorization by desorption or chemical/thermal destmction of the polymer matrix) but also for elaborating new materials or designing new applications. Depending on the metal immobilized on the biopolymer, it is possible to design new sorbents (immobilization of iron on alginate [119], of molybdate on chitosan [59], for As(V) removal, of silver on chitosan for pesticide removal [120]), supports for affinity chromatography [121], antimicrobial material [122], drug release material [123], neutron capture therapy [124], and photoluminescent materials [125]. These are only a few... 

We find that the ZnS and ZnSe host structures are excellent semiconductors and exhibit very high efficiencies of photoluminescence and cathodolumlnescence, especially when activated by copper, silver and gold. There is a large body of prior literature wherein the valence state of these activators is considered to be Qi+, Ag - and Au+. These are known stable states of these elements. The electron configuration of the elemental state is diOsi. Note that the d o electron configuration would... 

Liu JC, Cao J, Deng WT, Chen BH. Synthesis, crystal structure, photoluminescent, and electrochemical properties of a novel 2-D silver(I) coordination polymer with lH-l,2,4-triazole-1 -methylene-1 H-benzimidazole-1 -acetic acid. J Chem Crystallogr 2011 41(6) 806-10. 

Chan S, Kwon S, Koo TW, Lee LP, Berlin AA (2003) Surface-enhanced Raman scattering of small molecules from silver-coated silicon nanopores. Adv Mater 15 1595 Chen LL, Tang ZK, Shi MJ (2013) Microstructures and photoluminescence of electrochemically-deposited ZnO films on porous silicon and silicon. Key Eng Mater 538 30 Chiboub N, Boukherroub R, Gabouze N, Moulay S, Naar N, Lamouri S, Sam S (2010a) Covalent grafting of polyaniline onto aniline-terminated porous silicon. Opt Mater 32 748... 

Kim H, Lee C (2008) Enhancement in the photoluminescence of porous silicon deposited by sputtering an ultrathin silver film. J Korean Phys Soc 53 2562 Kim H, Han B, Choo J, Cho J (2008) Three-dimensional porous silicon particles for use in high-performance lithium secondary batteries. Angew Chem-Int Ed 47 10151 Kim H, Hong C, Lee C (2009) Enhanced photoluminescence from porous silicon passivated with an ultrathin aluminum film. Mater Lett 63 434... 

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