TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The method further comprises: refluxing the solution; adjusting the pH to acidic conditions, where the pH is adjusted to 3-5 or 3-4; adding an inorganic salt to the dispersion of the unoxidized nanostructured material and the polyelectrolyte; and dispersing and heating the metal particle coated nanostructured material in a solution, adding a reducing agent and continuing heating, adding a solution comprising a second noble metal precursor or metal oxide to the heated dispersion, where the second noble metal precursor or metal oxide is added sequentially, and heating the dispersion for a time suitable to form a metal film at the surface of the metal particle loaded nanostructured material. The method comprises varying the thickness of the metal film by varying the total amount of noble metal precursor or metal oxide. The conditions for reducing and depositing include adjusting the pH to 8-12. The conditions for reducing and depositing further include subjecting the solution to electromagnetic waves with wavelengths of 1 mm to 1 m. The step of subjecting the solution to the electromagnetic waves is carried out for 1-3 minutes. The reducing agent is added together with a stabilizer. Preferred Components: The inorganic salt is comprised in the dispersion of the unoxidized nanostructured material and the polyelectrolyte in a concentration of less than 1 wt.%, based on the total amount of the dispersion. The noble metal is ruthenium, rhodium, gold (Au), platinum (Pt), palladium (Pd), osmium, iridium and alloys of the above noble metals. The alloy is an alloy of Au, Pt, Pd, copper (Cu), or indium (In), or indium-selenium, platinum-ruthenium, copper-selenium, and/or stannous sulfide or silver-nickel. The noble metal precursor is silver nitrate, diamminesilver(I) cation, chloroauric acid, chloroplatinate, palladium dichloride, potassium tetrachloropalladate, ruthenium(III)chloride and/or chloroplatinic acid hexahydrate. The metal oxide is silver manganese oxides, aluminum trioxide, molybdenum trioxide, manganese dioxide, vanadium pentaoxide, titanium dioxide, silicon dioxide, zinc dioxide, tin dioxide, iron trioxide, nickel oxide, cobalt(II, III)oxide, cobalt(II)oxide, niobium pentoxide and/or tungsten(III)oxide, where the metal oxide can be either stoichiometric or non stoichiometric (e.g. Men-xOm-y , where x, y are 0 less than 1, m is 1-5, and n is 1-3). The molar ratio of reducing agent to the second noble metal precursor or metal oxide is 1:1-10:1 (preferably 4:1 or 5:1). The second noble metal of the second noble metal precursor is the noble metal. The second noble metal precursor is the same as or different from the noble metal precursor. The dimension of the nanostructured material is less than 100 nm. The nanostructured material is made of carbon material, which is activated carbon, carbon blacks or graphite. The particles do not form particle aggregates.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The reducing agent is ascorbic acid, boranes, copper hydride, citric acid, diisobutylaluminum hydride, diethyl-1,4-dihydro-2,6-dimethyl-3,5-pyridinedicarboxylate, ethanol, ethyleneglycol, formaldehyde, formic acid, hydrazine, hydrogen, lithium aluminum hydride, 3-mercaptopropionic acid, methanol, nickel borohydride, silane, isopropanol (2-propanol), sodium bis(2-methoxyethoxy)aluminum hydride, sodium hydroxymethanesulfinate, sodium borohydride, sodium cyanoborohydride, sodium dithionite, sodium triacetoxyborohydride, tetramethyldisiloxane, tributyltin hydride (tributylstannane), triphenylphosphine or triphenylphosphite. The reduction potential of the reducing agent is 1-0 V.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The polyelectrolyte is a positively charged polyelectrolyte or negatively charged polyelectrolyte. The positively charged polyelectrolyte is naturally occurring polyelectrolytes, polyelectrolytes comprising a quaternary ammonium group and its copolymers, polyelectrolytes comprising a pyridinium group and its copolymers or protonated polyamines. The negatively charged polyelectrolyte is naturally occurring polyelectrolytes, polyelectrolytes comprising a sulfonate group and their salts, and copolymers of it, or polycarboxylates and sulfates. The polyelectrolyte is 1-aminopyrene, poly(diallyldimethylammonium chloride), poly(styrenesulfonic acid), poly(acrylic acid) or poly(allylaminehydrochloride). The layer is 4-20 nm thick. EXAMPLE - Multi-walled carbon nanotubes (MWCNTs) (100 mg) were first ultrasonically suspended in deionized water (400 ml) in the presence of poly(diallyldimethylammonium chloride) (PDDA) (5 wt.%) and sodium chloride (1 wt.%) to yield a stable nanotube suspension. The positively charged ammonium groups of PDDA served as primers for the homogeneous deposition of platinum (Pt). Addition of sodium chloride could affect the polymeric chain configuration in the polyelectrolyte solution. If no salt was added, similar charges within a PDDA chain could repel each other, resulting in a rod-like configuration of the chain. However, any configuration of the PDDA chain was suitable to be used in the method but the addition of salts prefer configuration which could yield a more homogeneous distribution of the polyelectrolyte and thus subsequently a higher metal particle loading. The suspension was filtrated, washed several times to remove excess PDDA and sodium chloride, then vacuum dried (70 degrees C/24 hour). For in situ deposition of platinum metal particles, the PDDA coated tubes (30 mg) were mixed ultrasonically with chloroplatinic acid (sufficient for a Pt loading of 50 wt.%) in ethylene glycol after which the pH was adjusted to 12.5 by adding sodium hydroxide (2.5 M) dropwise. Afterwards, reduction of platinum was driven by refluxing the solution at 130 degrees C for 3 hour. After the reduction, the pH was adjusted back to 3-4. In the case of deposition of Pt nanoparticles on acid oxidized MWCNTs (AOMWCNTs), the procedure was similar. After the deposition of nanoparticles, MWCNTs supported Pt catalysts were obtained by filtrating the resultant solution and washing for several times using nylon filter membrane followed by the drying in vacuum oven at 70 degrees C for 24 hours to afford metal loaded nanostructured material.