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Fabrication of Multicolor‐Encoded Microspheres by Tagging Semiconductor Nanocrystals to Hydrogel Spheres

2005; Volume: 17; Issue: 3 Linguagem: Inglês

10.1002/adma.200400818

1521-4095

Meng Kuang, Dayang Wang, Han Bao, Mingyuan Gao, Helmuth Möhwald, Ming Jiang,

Supramolecular Self-Assembly in Materials

Single- or multicolor-encoded microspheres are created by confining water-soluble CdTe nanocrystals with different sizes within hydrogel microspheres of N-isopropylacrylamide and 4-vinylpyridine copolymer based on the pH-responsive swelling behavior of the gel (see Figure). The emission intensity level and color of the resulting fluorescent spheres can be manipulated simply by changing the concentrations of the different-sized NCs and their molar ratios.