Silver sols

Inorganic particles such as the dispersion of carbon black, chromatographic silica, glass beads, silica beads, silica sol, silver sol, titania, and polydispersed zirconia colloidal suspensions have been... 

Use of a protective colloid in solution prevents the formation of the ordinary and expected precipitate in many eases, and causes the formation of the expected substance -as colloidal sol. Silver nitrate (0.6 gram per liter and potassium dichromate (0.5 gram per liter) to one of which is added 0.1 volume of Itol gelatin solution (2 grains per 100 milliliters of water) are mixed with stirring silver dichromate sol is formed. 

Gold sol, selenium sol, silver sol Bacteriophage, erythrocyte, latex bead, liposome, quantum dot Up-converting lanthanide- .. 

Silver Oxide. Argentous oxide. Ag20 mol wt 231.76. Ag 93.10%, O 6 90%, May be prCpd by making sol silver salt solns alkaline Madsen, Z. Anorg. Allgem, Chem. , 197 (1913). 

On a basis of the -analysis results, an average size of the silver crystallites was calculated it consists of 9.3 nm respectively the diameter of the spherical particle for monodisperse system isD = 4/3 and = 12.4 nm. Calculated accordingly to the location of the surface Plasmon resonance adsorption maximum of the sol silver nanoparticles (Fig. 4, b) value of average diameter of silver nanoparticles obtained under such conditions consists of 12 nm. 

Somewhat more complicated were the experiments by Kruyt and Kunst on various hydrophobic sols (silver halides, arsenic sulphide). They found an increase of the D.C of the order expected from eq (40) with k a 0.5 or 1.0. The dispersion frequency was also in accord with eq. (41). So in these experiments the double layer probably played the most important role. Nevertheless the influence of added electrolytes was not clear in all respects. More experiments and a more refined theory are desired here. 

While much early work with dispersed electrochemical systems focused on silver halide sols [16], more recent studies by Rusling and co-workers and others exploited... 

Among the many applications of LB films, the creation or arrangement of colloidal particles in these films is a unique one. On one hand, colloidal particles such as 10-nm silver sols stabilized by oleic acid can be spread at the air-water interface and LB deposited to create unique optical and electrooptical properties for devices [185]. 

Al-Obaidi A H R, Rigby S J, Hegarty J N M, Bell S E J and McGarvey J J 1996 Direct formation of silver and gold metal liquid-like films (MELLFS) from thiols and sols without organic solvents SERS and AFM studies ICORS 96 XVth Int. Conf on Raman Spectroscopy ed S A Asher and P B Stein (New York Wiley) pp 590-1... 

Tarazona A, Kreisig S, Koglin E and Schwuger M J 1997 Adsorption properties of two cationic surfactant classes on silver surfaces studied by means of SERS spectroscopy and ab initio calculations Prog. Colloid Polym. Sol. 103 181-92... 

Reerink H and Overbeek J Th G 1954 The rate of coagulation as a measure of the stability of silver iodide sols Discuss. Faraday Soc. 18 74-84... 

Silver permanganate [7783-98-4] M 226.8, d 4.49. Violet crystals which can be crystallised from hot H2O (sol is 9g/L at 20°). Store in the dark. Oxidising agent, decomposed by light. 

T. Doppler and W Pfeiler, Resistometric investigation of short-range order kinetics in gold-silver alloys, phys. slot. sol. (a) 131 131 (1992). 

The dispersion (or sols) are only slightly viscous. Examples sols of metals, silver halides, metallic sulphides, etc. 

Silver Pentaglyceryl Trinitramine). CH3.C(CH2NAgN02)3l mw 572.81, N 14.68%. OB to C02 -23.74%, sol in aq ammonia. Prepn from pentaglyceryl trinitrourethane in ammoni-acal soln upon addition of Ag nitrate in acetic acid. The Ag salt detonates when heated Refs 1) Beil — not found 2) Blomquist, OSRD 4134(1944)... 

Silver Nitride. (Fulminating Silver). Ag3N, mw 337.65, N4.15%, blk-grey powd, mp 25° (start of decompn), d 9.0 lg/cc at 19°. Sol in weak acids, si sol in aq ammonia sol in aq solns of Na chioride and K cyanide. Prepd by treating aq Ag oxide with aq ammonia soln, or by heating coned ammoniacal Ag chloride with solid KOH until evolution of ammonia ceases. The thoroug-ly washed product must be stored under w and, even so, is sensitive to touch (Refs 1—7)... 

Ethylnitrolic acid is an expl compd and forms numerous metallic salts, some of which are expls Potassium Salt. KC2H303N2, colorl amorph powder, si sol in methanol a weak expl Silver Salt. AgC2H303N2) white amorph powder, insol in w and dil ale. Sensitive to light,... 

Silver Oxalate. Ag2C204, mw 303.78, wh cryst powd mp, decomps violently between 130° 190° (see below) d 5.03g/cc. Sol in 24000p of w, moderately coned nitric acid, and ammonia. Can be prepd by mixing cold solns of oxalic acid and Ag nitrate (Refs 1, 2 6)... 

The Na salt may serve for the prepn of free iso-oxytetrazole, as well as its salts, such as Mercury salt. White solid, expl. Can be prepd by treating the Na compd with a sol Hg salt Silver salt. White solid, expl. Can be prepd by treating the Na compd with a Ag salt Refs 1) Beil 26, (109) 2) F.C. Palazzo, AitiR-... 

T. Klobb (Ref 1) obtained Silver Diamminopermanganate, AgMn04. 2NH3 violet rhombic plates sparingly sol in cold w, more sol in hot w. It expld on percussion decompd slowly on standing Refs 1) Mellor 12(1932), 332-3 2)Merck (1968). 949 3) CondChemDict (1971), 788... 

Silver salt. On treating a soln of picrylamino-tetrazole in acet acid with a small excess of aq Ag nitrate soln, a yel ppt is obtained which corresponds to the formula C7H30 N8Ag, N=27.89%. It is insol in nitric acid and difficultly sol in ammonia. It detonates violently on heating in a sealed tube or on impact... 

Nitro-m-phthalic Acid. Crysts, mp 255—60°. Diff sol in cold w, v sol in hot w, ale eth. Forms numerous salts of which the silver salt was reported to be expl Ref Beil 9,839, (373) [610]... 

Penta-1,3-diyne (Methyldiacetylene). CH3.CiC.CiCH mw 65.10 OB to C02 —294.93% liq mp —4.5 to -38.5° bp 76-77° (explds at atm press), 45° at 140mm d 0.7909 g/cc at 20/4° RI 1.4762 (Ref 3) and 1.4817 (Ref 1). Sol in ethanol and petr with a bp > 180°. Prepn is by reacting monosodium-acetylenide with dichloromethane in liq ammonia at 20 to 40°, followed by treatment with ammonium chloride. The product is stable in the dark at -35° but polymerizes readily at above —20° in the light. Penta-1,3-diyne forms two expl salts Copper penta-1,3-diyne, CuCsH3, dark yel ndls/by reaction with CuCl, explds on shock or by rubbing and Silver penta-1,3-diyne, yel-brn ndls, by reaction with aq silver nitrate in ammonium hydroxide, a v expl compd Refs 1) Beil 1, [247], 1057 <1117)... 

The Ag salt, Silver -0-Azjdo Propionic Acid, AgC3H402N3 white ndles si w sol, also explds on heating... 

Nao.206wt%Hg I NaBr,sol., NaBr,sat., AgBr, ethanol Ag (silver electro-lytically deposited)... 

For this micro reactor version, the catalyst was coated on the AlMg3 platelet as a thin silver layer by sputtering [43,44], A further set of platelets was covered with an a-alumina layer by sol-gel technique and impregnated by a three-step procedure with silver lactate. 

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