机构:New York University Abu Dhabi,Radcliffe Institute for Advanced Study
Ejaz Ahmed
Durga Prasad Karothu
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机构:New York University Abu Dhabi,Radcliffe Institute for Advanced Study
Durga Prasad Karothu
Mark Warren
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机构:New York University Abu Dhabi,Radcliffe Institute for Advanced Study
Mark Warren
Panče Naumov
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机构:New York University Abu Dhabi,Radcliffe Institute for Advanced Study
Panče Naumov
机构:
[1] New York University Abu Dhabi,Radcliffe Institute for Advanced Study
[2] Diamond Light Source,undefined
[3] Harvard University,undefined
来源:
Nature Communications
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10卷
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摘要:
Molecular crystals can be bent elastically by expansion or plastically by delamination into slabs that glide along slip planes. Here we report that upon bending, terephthalic acid crystals can undergo a mechanically induced phase transition without delamination and their overall crystal integrity is retained. Such plastically bent crystals act as bimorphs and their phase uniformity can be recovered thermally by taking the crystal over the phase transition temperature. This recovers the original straight shape and the crystal can be bent by a reverse thermal treatment, resulting in shape memory effects akin of those observed with some metal alloys and polymers. We anticipate that similar memory and restorative effects are common for other molecular crystals having metastable polymorphs. The results demonstrate the advantage of using intermolecular interactions to accomplish mechanically adaptive properties with organic solids that bridge the gap between mesophasic and inorganic materials in the materials property space.
机构:
Dept Mat Sci & Engn, Dept Biomed Engn, Pittsburgh, PA 15213 USADept Mat Sci & Engn, Dept Biomed Engn, Pittsburgh, PA 15213 USA
Balasubramanian, Aditya
Morhard, Robert
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Dept Mat Sci & Engn, Dept Biomed Engn, Pittsburgh, PA 15213 USADept Mat Sci & Engn, Dept Biomed Engn, Pittsburgh, PA 15213 USA
Morhard, Robert
Bettinger, Christopher J.
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Dept Mat Sci & Engn, Dept Biomed Engn, Pittsburgh, PA 15213 USA
McGowan Inst Regenerat Med, Pittsburgh, PA 15219 USADept Mat Sci & Engn, Dept Biomed Engn, Pittsburgh, PA 15213 USA