Han Li PhD candidate in Applied Physics, Vlassak’s Group
School of Engineering and Applied Sciences (SEAS), Harvard University Office: ESL 112, 40 Oxford St., Cambridge, MA 02138 Phone: (617) 496-8145 E-mail: hanli@fas.harvard.edu
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	S.M. (Applied Physics), Harvard University, USA (2006)
	M.Phil (Materials science), University of Hong Kong, Hong Kong, China (2005)
	B.Eng with honor (Mechanical Engineering), Tsinghua University, China (2002)

Research

· Next generation nanoporous low-k dielectric materials, funded by semiconductor research corporation (SRC)

- Microstructure and porosity characterization

- Mechanical properties, fracture behaviors

- Reliability, moisture-induced subcritical fracture, environment effects

- Molecular level design towards lower dielectric constant and higher elastic stiffness

· Mechanical properties of thin film materials, nanomechanics, funded by NSF

- Characterization and modeling of nanoindentation performed on ultra-thin films, substrate effect

- Creep and size effect of solids in confined volume

· Novel fracture mechanics-based techniques for quantitative adhesion measurement in small specimens, with application in thermoelectric metallization, funded by NASA.

Peer-reviewed Publications

Journal paper (to download, go to Vlassak’s Group )

1 Han Li, Nicholas X. Randall and Joost Vlassak, "New methods of analyzing indentation experiments on very thin films ", submitted.

2 Christos F. Karanikas, Han Li, Joost J. Vlassak, James J. Watkins,"Quantitative Interfacial Energy Measurements of Adhesion-Promoted Thin Copper Films by Supercritical Fluid Deposition on Barrier Layers", Journal of Engineering Materials and Technology, accepted..

3 Han Li, Ting Y.Tsui and Joost Vlassak, "Water diffusion and fracture behavior in nano-porous low-k dielectric film stacks", J. Appl. Phys,106, 2009.

4 Han Li and Joost J. Vlassak, "Determining the elastic modulus and hardness of an ultra-thin film on a substrate using nanoindentation", J. Mater. Res., 24(3), 2009.

5 Han Li, Youbo Lin, Ting Y.Tsui and Joost Vlassak, "The effect of porosity on the stiffness and fracture energy of brittle organosilicates", J. Mater. Res., 24(1), 2009.

6 Han Li, A.H.W. Ngan and M.G. Wang, “Continuous strain bursts in crystalline and amorphous metals during plastic deformation by nanoindentation”. J. Mater. Res., 20(11), 2005

7 Han Li and A. H. W. Ngan, “Size effects of nanoindentation creep”. J. Mater. Res., 19(2), 2004.

8 Han Li and A. H. W. Ngan. “Indentation size effects on the strain rate sensitivity of nanocrystalline Ni-25at%Al thin films”. Scripta Materialia, 52(9), 2005.

Conference proceeding

1 A. H. W. Ngan, G. Feng, B. Tang, Han Li and P.C. Wo, “Time-Dependent Plasticity in the Submicron Regime”. IUTAM Symposium on Size Effects on Material and Structural Behavior at Micron- and Nano-Scales, p115-125, 2006.

2 A.H.W. Ngan, P.C. Wo, L. Zuo, Han Li and N. Afrin, "The Strength of Submicron-sized Materials", International Journal of Modern Physics(B), 20(25-27), 2006.

3 Han Li and A. H. W. Ngan. “Initial contact behavior of nanograined Ni-25at.%Al film during nanoindentation”, Materials Research Society 2004 Fall Meeting, Symposium R: Fundamentals of Nanoindentation and Nanotribology III, Boston, p387, 2005.

4 Z. You, G. F. Zhang, Han Li, and Z. Y. Wang, “Design, Fabrication and Test of MEMS Propulsion with Solid Propellant”, 4th Round Table on Micro/Nano Technologies for Space, 2003

Conference Presentations & Posters

1 Poster, entitled “Generalized Oliver-Pharr method for indentation of thin films on substrate”, Materials Research Society fall meeting, Boston, 2008

2 Presentation, entitled “A General Analysis Method for Determining the Elastic Modulus and Hardness of Very Thin Films on a Substrate Using Nanoindentation”, IMECE2008-68436, IMECE, Boston , 2008

3 Presentation, entitled “The Effects of Porosity on the Stiffness and Fracture Toughness of Brittle Organosilicates.”, Materials Research Society spring meeting, San Francisco, 2008

4 Poster, entitled “Generalized Oliver-Pharr method for indentation of thin films on substrate”, Gordon Research Conference on Thin Film & Small Scale Mechanical Behavior, Waterville ME, 2008

5 Presentation, entitled “Initial contact behavior of nanograined Ni-25at.%Al film during nanoindentation”, Materials Research Society fall meeting, Boston, 2004

Patent

1 Han Li and Joost J. Vlassak, “Method to measure the elastic modulus and hardness of thin film on substrate by nanoindentation”, US patent Series No. 12/506,648, pending, filed on July 21, 2009.

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