Chiral Recognition of Amino Acids Based on Cyclodextrin‐Capped Quantum Dots

Water-soluble and stable semiconductor CdSe/ZnS quantum dots (QDs) are prepared by using β- and α-cyclodextrin (CD) as surface-coating agents by using a simple sonochemical method, which allows highly enantioselective fluorescent recognition of amino acids (see image). When CD-QDs are treated with L-amino acids (see image), a much greater fluorescence enhancement is observed than that with D-amino acids.