TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The nano-molecular sieve particles have a particle size of 5-1000 nm; and are selected from Si-MFI, SAPO-34, Si-MTW, Si-BEA, Si-MEL, LTA, FAU, Si-DDR, AlPO-14, AlPO-34, AlPO-18, AlPO-25, AlPO-5, SSZ-62, SSZ-13, UZM-9, UZM-25, CDS-1, MCM-65 and/or Nu-6(2). The functionalized template-free nano-molecular sieve is selected from 4,5-dihydroimidazole, poly(ethylene glycol), SH, NH2, C?=N, O=C=N, OH, NH(CH2)2NH2, OCH2CH(OH)CH2N(CH2CH2OH)2, calix(n)arenes, an ionic group selected from N+CH3((CH2)9CH3)2Cl-, N+(CH2)17CH3(CH3)2Cl-, N+(CH3)3Cl-, N+(CH2CH3)3Cl-, N+(CH2CH2CH2CH3)3Cl- or other trialkyl ammonium groups functionalized Si-MFI, SAPO-34, Si-MTW, Si-BEA, Si-MEL, LTA, FAU, Si-DDR, AlPO-14, AlPO-34, AlPO-18, AlPO-25, AlPO-5, SSZ-62, SSZ-13, UZM-9, UZM-25, CDS-1, MCM-65 and/or Nu-6(2).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The functional organic linkage is an organosilane. The functional organosilane linkage is a compound of formulae R(CH2)n'Si(OR1)3, R(CH2)n'SiR'(OR1)2 or R(CH2)n'SiR'(R'')(OR1). The second organosilane comprises a compound of formulae R2(CH2)mSi(OR3)3, R(CH2)n'SiR'(OR1)2, or R(CH2)n'SiR'(R'')(OR1).R and R2=functional group selected from 4,5-dihydroimidazole, poly(ethylene glycol), SH, NH2, C?=N, O=C=N, OH, NH(CH2)2NH2, OCH2CH(OH)CH2N(CH2CH2OH)2, calix(n)arenes, an ionic group selected from N+CH3((CH2)9CH3)2Cl-, N+(CH2)17CH3(CH3)2Cl-, N+(CH3)3Cl-, N+(CH2CH3)3Cl-, N+(CH2CH2CH2CH3)3Cl- or other trialkyl ammonium groups;n=4, 6, or 8;n' and m=1-20;R1, R', R'' and R3=1-8C hydrocarbon group.    TECHNOLOGY FOCUS - POLYMERS - Preferred Method: The functionalizing template-free nano-molecular sieve particles involves grafting functional organic linkages on a surface of the nano-molecular sieve particles. The nano-molecular sieve initially contains a structure-directing template, where after the grafting of the functional group to the nano-molecular sieve, the structure-directing template is removed from the nano-molecular sieve by calcination. The method further involves a second grafting step, where following the calcination, a second organosilane compound is grafted to the calcinated nano-molecular sieve to form functionalized template-free molecular sieve nanoparticles. The functionalized template-free molecular sieve nanoparticles are dispersible in organic solvents. Preferred Components: The polymer comprises at least one polymer selected from optionally substituted polymers and are selected from polysulfones; poly(styrenes) including styrene-containing copolymers comprising acrylonitrilestyrene copolymers, styrene-butadiene copolymers and styrene-vinylbenzylhalide copolymers; polycarbonates; cellulosic polymers comprising cellulose acetate-butyrate, cellulose propionate, ethyl cellulose, methyl cellulose, and nitrocellulose; polyamides and polyimides including aryl polyamides and aryl polyimides; polyethers; polyetherimides; polyetherketones; poly(arylene oxides) comprising poly(phenylene oxide) and poly(xylene oxide); poly(esteramide-diisocyanate); polyurethanes; polyesters (including polyarylates) comprising poly(ethylene terephthalate), poly(alkyl methacrylates), poly(acrylates), and poly(phenylene terephthalate); polypyrrolones; polysulfides; polymers from monomers having alpha-olefinic unsaturation comprising poly (ethylene), poly(propylene), poly(butene-1), poly(4-methyl pentene-1), polyvinyls comprising poly(vinyl chloride), poly(vinyl fluoride), poly(vinylidene chloride), poly(vinylidene fluoride), poly(vinyl alcohol), poly(vinyl esters) comprising poly(vinyl acetate) and poly(vinyl propionate), poly(vinyl pyridines), poly(vinyl pyrrolidones), poly(vinyl ethers), poly(vinyl ketones), poly(vinyl aldehydes) comprising poly(vinyl formal) and poly(vinyl butyral), poly(vinyl amides), poly(vinyl amines), poly(vinyl urethanes), poly(vinyl ureas), poly(vinyl phosphates), and poly(vinyl sulfates); polyallyls; poly(benzobenzimidazole); polyhydrazides; polyoxadiazoles; polytriazoles; poly(benzimidazole); polycarbodiimides; polyphosphazines; and interpolymers including block interpolymers containing repeating units comprising terpolymers of acrylonitrile-vinyl bromide-sodium salt of para-sulfophenylmethallyl ethers; and their grafts and blends, where typical substituents providing substituted polymers include halogens comprising fluorine, chlorine and bromine; hydroxyl groups; lower alkyl groups; lower alkoxy groups; monocyclic aryl; and lower acid groups (preferably cellulose acetate, cellulose triacetate, polysulfone, polyethersulfone, polyimide, polyetherimide, polyamide, cellulose nitrate, polyurethane, polycarbonate, and polystyrene, especially polyetherimides and polyimides). EXAMPLE - A template-containing SAPO-34 nanoparticles was prepared using tetraethylammonium hydroxide solution (TEAOH)(167.62 g) and Ludox AS40 (RTM: colloidal silica)(16.95 g). A template-free nano-SAPO-34 was synthesized by dispersing a template-containing SAPO-34 nanoparticles in water at a concentration of 4 wt.%. The outside surface of the template-containing SAPO-34 nanoparticles was functionalized by reaction with an ethanol solution of aminopropyltriethoxysilane (APTS) in a 4-fold excess relative to the amount of APTS needed for full surface coverage on the particles. The APTS organic reagent:SAPO-34 particle ratio was fixed at 1 mmol/g. After the reaction, the excess of APTS reagent was eliminated by repeated centrifugation and re-dispersion in ethanol and then in water by ultrasonication. The recovered template-containing solid was dried at 80degrees C overnight and calcinated at 550degrees C for 6 hours under air to form template-free nano-SAPO-34. Mixed matrix dense films were prepared by solution casting a polymer solution containing dispersed template-free nano-molecular sieves or surface-functionalized template-free nano-molecular sieves. Cellulose acetate (CA) and cellulose triacetate (CTA) polymers with 1:1 weight ratio were dissolved in 1,4-dioxane solvent at room temperature for 12 hours to form a 2 wt.% CA solution. A measured amount of the dry template-free nano-molecular sieves was then added, and the resulting slurry was stirred and ultrasonicated for three times to ensure good dispersion of the template-free molecular sieves. The CA solutions with template-free nano-molecular sieves loadings of 0, 10, 20, 30, 40, and 50 wt.% (based on weight of CA+CTA) were poured into a glass ring on top of a clean glass plate, and dried at room temperature for 24 hours. The resulting dried mixed matrix dense films were detached from the glass plate and were further dried at room temperature for at least 48 hours and then at 110degrees C for at least 24 hours under vacuum. The dense films were around 2-3 mils thick. They were cut into small circles for gas separation measurements using a dense film test unit.