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Seeing the right face: Mono- and bifunctionalized Janus particles with controllable chemical patchiness are prepared by a general masking/unmasking technique and subsequent chemical functionalization (see picture). Supramolecular “host”- and “guest”-functionalized Janus particles were prepared, and specific noncovalent host–guest interactions were used to controllably assemble heterogeneous particles.
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Ling et al. (2009) studied this question.
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