In Fall 2013, the Materials Science faculty separated from the MEMS Department and formed the new department of Materials Science and NanoEngineering.

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  • Titanium oxide improves boron nitride photocatalytic degradation of perfluorooctanoic acid 

    Duan, Lijie; Wang, Bo; Heck, Kimberly N.; Clark, Chelsea A.; Wei, Jinshan; (2022)
    Boron nitride (BN) has the newly-found property of degrading recalcitrant polyfluoroalkyl substances (PFAS) under ultraviolet C (UV-C, 254 nm) irradiation. It is ineffective at longer wavelengths, though. In this study, we report the simple calcination of BN and UV-A active titanium oxide (TiO2) creates a BN/TiO2 composite that is more photocatalytically ...
  • Automatic parameter selection for electron ptychography via Bayesian optimization 

    Cao, Michael C.; Chen, Zhen; Jiang, Yi; Han, Yimo (2022)
    Electron ptychography provides new opportunities to resolve atomic structures with deep sub-angstrom spatial resolution and to study electron-beam sensitive materials with high dose efficiency. In practice, obtaining accurate ptychography images requires simultaneously optimizing multiple parameters that are often selected based on trial-and-error, ...
  • Next-generation 2D optical strain mapping with strain-sensing smart skin compared to digital image correlation 

    Meng, Wei; Pal, Ashish; Bachilo, Sergei M.; Weisman, R. Bruce; Nagarajaiah, Satish (2022)
    This study reports next generation optical strain measurement with “strain-sensing smart skin” (S4) and a comparison of its performance against the established digital image correlation (DIC) method. S4 measures strain-induced shifts in the emission wavelengths of single-wall carbon nanotubes embedded in a thin film on the specimen. The new S4 film ...
  • K-point longitudinal acoustic phonons are responsible for ultrafast intervalley scattering in monolayer MoSe2 

    Bae, Soungmin; Matsumoto, Kana; Raebiger, Hannes; Shudo, Ken-ichi; Kim, Yong-Hoon; (2022)
    In transition metal dichalcogenides, valley depolarization through intervalley carrier scattering by zone-edge phonons is often unavoidable. Although valley depolarization processes related to various acoustic phonons have been suggested, their optical verification is still vague due to nearly degenerate phonon frequencies on acoustic phonon branches ...
  • Assembly of planar chiral superlattices from achiral building blocks 

    Cheng, Zhihua; Jones, Matthew R. (2022)
    The spontaneous assembly of chiral structures from building blocks that lack chirality is fundamentally important for colloidal chemistry and has implications for the formation of advanced optical materials. Here, we find that purified achiral gold tetrahedron-shaped nanoparticles assemble into two-dimensional superlattices that exhibit planar chirality ...
  • CO2/carbonate-mediated electrochemical water oxidation to hydrogen peroxide 

    Fan, Lei; Bai, Xiaowan; Xia, Chuan; Zhang, Xiao; Zhao, Xunhua; (2022)
    Electrochemical water oxidation reaction (WOR) to hydrogen peroxide (H2O2) via a 2e− pathway provides a sustainable H2O2 synthetic route, but is challenged by the traditional 4e− counterpart of oxygen evolution. Here we report a CO2/carbonate mediation approach to steering the WOR pathway from 4e− to 2e−. Using fluorine-doped tin oxide electrode in ...
  • Inverted Conformation Stability of a Motor Molecule on a Metal Surface 

    Schied, Monika; Prezzi, Deborah; Liu, Dongdong; Jacobson, Peter; Corni, Stefano; (2022)
    Molecular motors have been intensely studied in solution, but less commonly on solid surfaces that offer fixed points of reference for their motion and allow high-resolution single-molecule imaging by scanning probe microscopy. Surface adsorption of molecules can also alter the potential energy surface and consequently preferred intramolecular ...
  • Exploring the Photophysical Properties of UiO-67 MOF Doped with Rhenium Carbonyl Complexes 

    Ling, Kexin; Ogle, Meredith M.; Flores, Erick; Godoy, Fernando; Martí, Angel A. (2022)
    Directly coordinating transition metal catalysts to the linkers of stable metal organic frameworks (MOFs) is a sleek solution to increasing the longevity of the catalyst. Photoluminescence metal complexes incorporated in MOFs have risen in interest lately. Particularly, Re(bpydc)(CO)3Cl (bpydc = 2,2’-bipyridine-5,5’-dicarboxylic acid) doped zirconium-based ...
  • Understanding the effect of liquid crystal content on the phase behavior and mechanical properties of liquid crystal elastomers 

    Barnes, Morgan; Cetinkaya, Sueda; Ajnsztajn, Alec; Verduzco, Rafael (2022)
    Liquid crystal elastomers are stimuli-responsive, shape-shifting materials. They typically require high temperatures for actuation which prohibits their use in many applications, such as biomedical devices. In this work, we demonstrate a simple and general approach to tune the order-to-disorder transition temperature (TODT) or nematic-to-isotropic ...
  • Light-activated molecular machines are fast-acting broad-spectrum antibacterials that target the membrane 

    Santos, Ana L.; Liu, Dongdong; Reed, Anna K.; Wyderka, Aaron M.; van Venrooy, Alexis; (2022)
    The increasing occurrence of antibiotic-resistant bacteria and the dwindling antibiotic research and development pipeline have created a pressing global health crisis. Here, we report the discovery of a distinctive antibacterial therapy that uses visible (405 nanometers) light-activated synthetic molecular machines (MMs) to kill Gram-negative and ...
  • Investigation into the Re-Arrangement of Copper Foams Pre- and Post-CO2 Electrocatalysis 

    Rudd, Jennifer A.; Hernandez-Aldave, Sandra; Kazimierska, Ewa; Hamdy, Louise B.; Bain, Odin J. E.; (2021)
    The utilization of carbon dioxide is a major incentive for the growing field of carbon capture. Carbon dioxide could be an abundant building block to generate higher-value chemical products. Herein, we fabricated a porous copper electrode capable of catalyzing the reduction of carbon dioxide into higher-value products, such as ethylene, ethanol and ...
  • Solution-Deposited and Patternable Conductive Polymer Thin-Film Electrodes for Microbial Bioelectronics 

    Tseng, Chia-Ping; Liu, Fangxin; Zhang, Xu; Huang, Po-Chun; Campbell, Ian; (2022)
    Microbial bioelectronic devices integrate naturally occurring or synthetically engineered electroactive microbes with microelectronics. These devices have a broad range of potential applications, but engineering the biotic–abiotic interface for biocompatibility, adhesion, electron transfer, and maximum surface area remains a challenge. Prior approaches ...
  • Thermal annealing effects on palladium-decorated gold nanoparticle catalysts 

    Fang, Yu-Lun; Zhao, Zhun; Heck, Kimberly N.; Pretzer, Lori A.; Guo, Neng; (2022)
    Palladium metal supported on gold in the form of surface ensembles have enhanced catalytic properties compared to monometallic Pd, as exemplified by Pd-decorated Au nanoparticles (Pd-on-Au NPs) for various room-temperature reactions. Whereas the catalytic properties and nanostructure of Pd-on-Au NPs are not known at higher temperatures, this work ...
  • 3D Covalent Organic Frameworks with Interpenetrated pcb Topology Based on 8-Connected Cubic Nodes 

    Shan, Zhen; Wu, Miaomiao; Zhu, Dongyang; Wu, Xiaowei; Zhang, Kan; (2022)
    The connectivity of building units for 3D covalent organic frameworks (COFs) has long been primarily 4 and 6, which have severely curtailed the structural diversity of 3D COFs. Here we demonstrate the successful design and synthesis of a porphyrin based, 8-connected building block with cubic configuration, which could be further reticulated into an ...
  • Versatile acid solvents for pristine carbon nanotube assembly 

    Headrick, Robert J.; Williams, Steven M.; Owens, Crystal E.; Taylor, Lauren W.; Dewey, Oliver S.; (2022)
    Chlorosulfonic acid and oleum are ideal solvents for enabling the transformation of disordered carbon nanotubes (CNTs) into precise and highly functional morphologies. Currently, processing these solvents using extrusion techniques presents complications due to chemical compatibility, which constrain equipment and substrate material options. Here, ...
  • Ultrahigh strength, modulus, and conductivity of graphitic fibers by macromolecular coalescence 

    Lee, Dongju; Kim, Seo Gyun; Hong, Seungki; Madrona, Cristina; Oh, Yuna; (2022)
    Theoretical considerations suggest that the strength of carbon nanotube (CNT) fibers be exceptional; however, their mechanical performance values are much lower than the theoretical values. To achieve macroscopic fibers with ultrahigh performance, we developed a method to form multidimensional nanostructures by coalescence of individual nanotubes. ...
  • Overcoming mass transfer limitations in cross-linked polyethyleneimine-based adsorbents to enable selective CO2 capture at ambient temperature 

    Hamdy, Louise B.; Gougsa, Abel; Chow, Wing Ying; Russell, James E.; García-Díez, Enrique; (2022)
    New self-supported polyamine CO2 adsorbents are prepared by cross-linking branched polyethyleneimine (PEI) with 2,4,6-tris-(4-bromomethyl-3-fluoro-phenyl)-1,3,5-triazine (4BMFPT). Controlling the degree of cross-linking to ensure abundant free amine functionalities while maintaining a structure conducive to efficient mass transfer is key to accessing ...
  • Interaction of Surface-Modified Alumina Nanoparticles and Surfactants at an Oil/Water Interface: A Neutron Reflectometry, Scattering, and Enhanced Oil Recovery Study 

    Al-Shatty, Wafaa; Campana, Mario; Alexander, Shirin; Barron, Andrew R. (2022)
    The evaluation of the mechanism of nanoparticle (NP)/surfactant complex adsorption at the critical oil/water interface was studied. A sophisticated technique (neutron reflectometry) was used to give a unique insight on NP/oil interactions in oil recovery systems. Herein, the adsorption of two modified alumina NPs with different degrees of hydrophobicity ...
  • Characterization of polymeric surfaces and interfaces using time-of-flight secondary ion mass spectrometry 

    Mei, Hao; Laws, Travis S.; Terlier, Tanguy; Verduzco, Rafael; Stein, Gila E.; (2022)
    Time-of-flight secondary ion mass spectrometry (ToF-SIMS) is used for chemical analysis of surfaces. ToF-SIMS is a powerful tool for polymer science because it detects a broad mass range with good mass resolution, thereby distinguishing between polymers that have similar elemental compositions and/or the same types of functional groups. Chemical ...
  • Oxygen Reduction Reaction with Manganese Oxide Nanospheres in Microbial Fuel Cells 

    Vemuri, Bhuvan; Chilkoor, Govinda; Dhungana, Pramod; Islam, Jamil; Baride, Aravind; (2022)
    Operating microbial fuel cells (MFCs) under extreme pH conditions offers a substantial benefit. Acidic conditions suppress the growth of undesirable methanogens and increase redox potential for oxygen reduction reactions (ORRs), and alkaline conditions increase the electrocatalytic activity. However, operating any fuel cells, including MFCs, is ...

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