Invited paper. The poor prospects for one-dimensional devices

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Abstract
Semiconductor heterojunctions heralded the intense and interesting physics study of quasi-two-dimensional electronic and optical phenomena. A subset of this physics has been exploited in practical devices. While the physics of corresponding quasi-one-dimensional phenomena is proving of arguably even greater interest, the prospects to date for practical devices emerging appear all but negligible. Instead we see a potentially promising future in the exploitation of materials, fully engineered in all three dimensions with nanometre-scale precision, as improved host materials for otherwise conventional devices.