Methods for the production of silver nanowires
AssigneeBASF SE
InventorsYuliang Wang, Janet Cravens Dickerson
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Abstract
Embodiments of the present invention are directed to novel methods for the solution-based production of silver nanowires by adaptation of the polyol process. Some embodiments of the present invention can be practiced at lower temperature and/or at higher concentration than previously described methods. In some embodiments reactants are added in solid form rather than in solution. In some embodiments, an acid compound is added to the reaction.
Claims20
A method for the production of silver nanowires comprising reacting:
- i) at least one polyol;
- ii) at least one silver solution comprising at least one silver compound capable of producing silver metal when reduced;
- and
- iii) at least one organic protective agent (OPA);
- as reactants in a reaction at a reaction temperature and under conditions that produce silver nanowires wherein the molar concentration of the silver compound in the silver solution is in the range of about 0.3 molar to about 3.0 molar, wherein the nanowires have an aspect ratio (length/diameter) of at least 150.
A method for the production of silver nanowires, said method comprising:
- reacting:
- i) at least one polyol;
- ii) at least one silver solution comprising at least one silver compound capable of producing silver metal when reduced;
- and
- iii) at least one organic protective agent (OPA);
- as reactants in a reaction at a reaction temperature and under conditions that produce silver nanowires wherein the molar concentration of the silver compound in the silver solution is in the range of about 0.3 molar to about 3.0 molar, wherein the reaction produces bulk silver nanowire product having an aspect ratio weighted average that is at least 125.
A method for the production of silver nanowires comprising:
- i) mixing as reactants for a reaction:
- a) at least one silver solution comprising at least one silver compound capable of producing silver metal when reduced;
- b) at least one polyol;
- and c) at least one organic protective agent to produce a mixture;
- and
- ii) reacting said mixture at a reaction temperature and under conditions that produce a product solution comprising silver nanowires;
- wherein the molar concentration of the silver compound in the silver solution is in the range of about 0.3 molar to about 3.0 molar, wherein the nanowires have an aspect ratio (length/diameter) of at least 150.
A method for the production of silver nanowires, said method comprising:
- i) mixing as reactants for a reaction:
- a) at least one silver solution comprising at least one silver compound capable of producing silver metal when reduced;
- b) at least one polyol;
- and c) at least one organic protective agent to produce a mixture;
- and
- ii) reacting said mixture at a reaction temperature and under conditions that produce a product solution comprising silver nanowires;
- wherein the molar concentration of the silver compound in the silver solution is in the range of about 0.3 molar to about 3.0 molar, wherein the reaction produces bulk silver nanowire product having an aspect ratio weighted average that is at least 125.
Dependencies are inferred from the claim text.