Journal Articles:

37. (Invited) Zhengping Zhou, Guoliang Liu,* “Hierarchical self-assembly of nanostructures in block copolymer nanofibers”, submitted.

36. (Invited) Assad U. Khan, Zhengping Zhou, Joseph Krause,‡ Guoliang Liu,* “Poly(vinylpyrrolidone)-free Multi-step Synthesis of Silver Nanoplates with Plasmon Resonance in the Near Infrared Range”, Small, just accepted. [DOI: 10.1002/smll.201701715] (undergraduate)

SynopsisPVP-free multi-step growth is used to synthesize high-aspect-ratio Ag nanoplates with plasmon resonance in the NIR region. Citrate-capped Ag spherical seeds, instead of the PVP-capped ones, are used to expedite the synthesis and avoid any polymer coating around the Ag nanoplates.

35.    Alexander P. Haring, Assad Khan, Guoliang Liu,* Blake N. Johnson,* "3D Printed Functionally Graded Plasmonic Constructs", Advanced Optical Materials, 2017, 1700367. [DOI: 10.1002/adom.201700367] (‡ equal contribution)

SynopsisPlasmonic Ag nanoplates are integrated with polymers and 3D-printed into plasmonically active functional structures. The inks of polymers and Ag nanoplates represent as a new class of materials for the next-generation plasmonic devices.

34.    Assad U. Khan, Clayton Scruggs, David Hicks,‡ Guoliang Liu,* “Two-dimensional plasmonic nanoparticles as sensors to probe polymer brush formation”, Analytical Chemistry, 201789 (14), 7541-7548. [DOI: 10.1021/acs.analchem.7b01361(undergraduate)

Synopsis: We for the first time introduce plasmonic nanoparticles as simple yet delicate nanoscale sensors to probe the polymer brush formation and unveil the underlying mechanism. The study has confirmed the three-regime kinetics and revealed the cause of “latent regime” and what happens in the “latent regime”.

33.   Ke Cao, Guoliang Liu,* Low-molecular-weight, high-mechanical-strength, and solution-processable telechelic polyetherimide end-capped with ureido-pyrimidinone", Macromolecules, 2017, 50 (5), 2016–2023. [DOI: 10.1021/acs.macromol.7b00156]

Synopsis: After attaching quadruple hydrogen-bonding UPy end groups, polyetherimides (PEI) with a Mw as low as 8 kDa exhibited outstanding mechanical strength (GPa level) comparable to high-molecular-weight state-of-the-art commercial PEIs. The UPy end group was thermally stable up to 240 °C.

32.   Zhengping Zhou, Guoliang Liu,* “Controlling the Pore Size of Mesoporous Carbon Thin Films through Thermal and Solvent Annealing”, Small, 2017, 1603107. [DOI: 10.1002/smll.201603107]

Synopsis: Surprisingly, we found that the pore size and center-to-center spacing of mesoporous carbon thin films from PAN-b-PMMA increased significantly with annealing temperature, which is different from most block copolymers. The work provides a simple strategy to control the pore size of mesoporous carbon thin films by tuning the processing conditions instead of synthesizing block copolymers of various molecular weights and compositions.

31.   Guoliang Liu,* Paul F. Nealey, Improved Block Copolymer Domain Dispersity on Chemical Patterns via Homopolymer-Blending and Molecular Transfer Printing, Polymer, 2017, 116, 99-104. [DOI: 10.1016/j.polymer.2017.03.049]

30.   Resham J. Banga, Sai Archana Krovi, Suguna P. Narayan, Anthony J. Sprangers, Guoliang Liu, Chad A. Mirkin, SonBinh T. Nguyen,* “Drug-loaded Polymeric Spherical Nucleic Acids: Enhancing Colloidal Stability and Cellular Uptake of Polymeric Nanoparticles through DNA Surface-functionalization”, Biomacromolecules2017, 18 (2), 483–489. [DOI: 10.1021/acs.biomac.6b01563].


29.   Assad Khan, Shuqi Zhao,‡ Guoliang Liu,* “Key Parameter Controlling the Sensitivity of Plasmonic Metal Nanoparticles: Aspect Ratio”, J. Phys. Chem. C, 2016120 (34), 19353–19364. [DOI: 10.1021/acs.jpcc.6b06519](undergraduate)

Synopsis: After measuring and analyzing the sensitivities of >74 types of nanoparticles, we found that the aspect ratio (R) is the key parameter that controls the nanoparticle sensitivity (S) following an empirical equation, = 46.87 + 109.37. Other parameters including shape, size, composition, and cross-sectional area have little effect on sensitivity.