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Tyler Engstrom
menteeDr. Paul E. Lammert
Carbon nanotubes are actually a special case of a more general structure, the carbon nanocones. A nanotube can be though of as a cone with six pentagonal rings in the endcap; these six pentagons induce sufficient Gaussian curvature to give a vanishing opening angle. When the structure has fewer than six pentagonal rings in the apex, the resulting structure forms a cone. These cones can have quite fascinating electronic and structural properties. Cones with a single pentagon act as a Mobius strip in momentum space. Cones with one or two pentagons can be mechanically inverted, acting as a constant-force spring.
Abdolmadjid Nili
menteeOleg Shklyaev
menteeYoujian Tang
It is well know that most objects obey Hooke's law, F = kX. Our project is to design a material that gives F = CONST. In another word, the tension force is independent of the deformation of the object. The right side is an example of such an material. It is a polymer. we have only showed a couple of units of the polymer. There are two conformations for this polymer. A unit of the first conformation is shorter than a unit of the second one and it also has a lower energy than the second one. Whenever there is an appropriate drag force on it. The polymer will under go a transformation from the first conformation to the second conformation. The transformation is happened unit by unit as the length of the polymer increase gradually. As a result, the energy of the material increases linearly with the elongation of the material. For such an material, the tension force is constant
Yuanxi Wang
Amelia Winner
Enshi Xu
Noah Yoder
Alumni:
 Corina M. Barbu Young-Moo Byun Cheng Ing Chia
 Ken E. Elder Ilya Grigorenko Dr. Humberto R. Gutierrez
 Jong E. Han Qingzhen Hao Kito S. Holliday
 Zhaohui Huang Ivan Iordanov Stephen P. Jordan
 Aleksey Kolmogorov Kerri Lendo Michael Lulis
 Elena R. Margine Zuleika Medina Torres Cristiano Nisoli
 Amir Nourhani Abbey Rhode Dragan Stojkovic
 David Stucke Rosalba Vilchis Feng Zhang
 Peihong Zhang
V. H. Crespi : Research Group