3D nanofabrication by volumetric deposition and controlled shrinkage of patterned scaffolds

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Science  14 Dec 2018:
Vol. 362, Issue 6420, pp. 1281-1285
DOI: 10.1126/science.aau5119

Shrinking problems in 3D printing

Although a range of materials can now be fabricated using additive manufacturing techniques, these usually involve assembly of a series of stacked layers, which restricts three-dimensional (3D) geometry. Oran et al. developed a method to print a range of materials, including metals and semiconductors, inside a gel scaffold (see the Perspective by Long and Williams). When the hydrogels were dehydrated, they shrunk 10-fold, which pushed the feature sizes down to the nanoscale.

Science, this issue p. 1281; see also p. 1244

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