NOVELTY - A composition comprises powder having average particle sizes of nanometer - micron; coating imparted to the powder particles; and carrier medium selected from carrier fluids, monomers, interpolymers, polymers, and phase change materials.    USE - For enhancing the thermal conductivity, coefficient of thermal heat transfer, electrical conductivity in a carrier media e.g. circuit boards, conductive inks, electomagnetic and radio frequency protective coatings, fuel cells, battery systems and paints; and in heat transfer media e.g. engine cooling, heating, air conditioning, refrigeration, thermal storage, in heat pipes, fuel cells, battery systems, hot water, steam systems, and microprocessor cooling systems.    ADVANTAGE - The composition has enhanced thermal and electrical conductivity, and energy efficiency of host carrier. The coating provides stabilization, corrosion resistance and dispersant. Resources are reduced by utilizing standard plastic and sintering production processes. Coated compound is readily dispersed in the carrier medium. Stabilization and passivation of the coated compound enables direct immersion into corrosive environments. The coated compound maintains a mobile colloidal dispersion within the phase change material, enabling the coated compound to be utilized without the use of dispersion enhancement devices in a host carrier system.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) method (m1) transferring heat between a heat source and a heat sink involving interposing between the heat source and the heat sink a heat transfer composition comprising a surface-coated powder (P1), where the coating imparting improves thermal conductivity properties to (P1) relative to uncoated powder;    (2) method (m2) of transferring electrons between cathode, an electron source, anode and an electron sink involving interposing between the cathode and anode an electrically conductive composition comprising a surface-coated powder (P2), the coating imparting improves electrical conductivity properties to (P2) relative to uncoated powder;    (3) a powder having enhanced thermal and electrical conductivity comprising powder precursor having average particle sizes of nanometer - micron size produced by a process step selected from solubilized, dispersed, emulsified, grinded, spray atomized and vaporized; coating imparted to the powder precursor particles; and reaction medium selected from solvents, fluids, monomers, interpolymers, polymers, and phase change materials;    (4) in situ complexing of coating compound on powder precursor particles is prepared by one of: microemulsions and chemical reduction of pre-complexed metal salts; microemulsions and reduction of pre-complexed metal salts using sonochemistry; sonochemistry using high or ultrahigh frequency acoustic wave generation of cavitation in reaction vessel for reduction of pre-complexed metal salts; sonochemistry using high or ultrahigh frequency acoustic wave generation of cavitation onto plating surface through plating by electroless deposition of pre-complexed metal salts; sonochemistry using high or ultrahigh frequency acoustic wave generation of cavitation onto plating surface through plating deposition by electrolysis of pre-complexed metal salts; sonochemistry using high or ultrahigh frequency acoustic wave generation of cavitation onto plating surface through plating deposition by electrolysis of pre-complexed metal salts using high frequency electrical power source; submicron atomization of pre-complexed metal salts in liquid carrier with in situ chemical reduction; submicron atomization of pre-complexed metal salts in liquid carrier with in situ electrochemical reduction; submicron atomization of pre-complexed metal salts in liquid carrier within vessel with voltage potential between atomizer and cathode; plasma processing of powder precursor with quenching in liquid carrier having pre-solubilized complexing coating compound; combustion synthesis processing of powder precursor with quenching in liquid carrier having pre-solubilized complexing coating compound; pre-complexed powder precursor dissolved in supercritical fluid with in situ chemical reduction; pre-complexed powder precursor dissolved in supercritical fluid with in situ electrochemical reduction; electrolysis of pre-complexed metal salts using high frequency electrical power source on anode and cathode; electrolysis of pre-complexed metal salts using electrically conductive material selected from group of electrolyte or conductive polymer; high pressure hydrogen chemical reduction reaction of powder precursor in liquid carrier having pre-solubilized complexing coating compound; high pressure hydrogen chemical reduction reaction of powder precursor in liquid carrier having pre-solubilized complexing coating compound in combination with high or ultrahigh frequency acoustic wave generation of cavitation in reaction vessel; high pressure hydrogen chemical reduction reaction of powder precursor in liquid carrier having pre-solubilized complexing coating compound in combination with high or ultrahigh frequency electromagnetic force generation in reaction vessel; cryogenic embrittlement in combination with processes selected from high pressure hydrogen embrittlement, or high/ultrahigh frequency acoustic wave generation of cavitation in reaction vessel; or electrodialysis of pre-complexed metal salts in combination with processes selected from the group of high pressure hydrogen embrittlement, or high/ultrahigh frequency acoustic wave generation of cavitation on cathode.