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Highlights

Highlights

H. Yun, A. Prakash, T. Birol, B. Jalan and K.A. Mkhoyan, Nano Lett. 21, 4357-4364 (2021)
H. Yun, A. Prakash, T. Birol, B. Jalan and K.A. Mkhoyan, Nano Lett. 21, 4357-4364 (2021)
May 10, 2022
UMN Materials Research Science and Engineering Center

Dopant Segregation at Dislocations in an Emerging Oxide Semiconductor

Andre Mkhoyan, Bharat Jalan, Turan Birol, University of Minnesota
Emerging semiconductors such as tin-based oxides have enormous application potential in devices, as they are transparent, support highly mobile electrons, and have wide “energy gaps”. Unlike better developed semiconductors, however, these materials are prone to harboring defects, which can limit essential properties such as electron mobility.
Host matrix engineering for enhanced molecular qubit coherence
Host matrix engineering for enhanced molecular qubit coherence
May 9, 2022
Big Idea: Quantum Leap

Host matrix engineering for enhanced molecular qubit coherence

Samuel L. Bayless (University of Chicago), Pratiti Deb (University of Chicago), Daniel W. Laorenza (MIT), Mykyta Onizhuk (University of Chicago), Giulia Galli (University of Chicago, Argonne National Lab), Danna E. Freedman (MIT), David D. Awschalom (University of Chicago, Argonne National Lab)  
At the University of Chicago MRSEC, we demonstrate that controlling the molecular crystal hosting the active qubit is a powerful means for enhancing coherence.
Self-assembly of nanocrystals into strongly electronically coupled all-inorganic supercrystals
Self-assembly of nanocrystals into strongly electronically coupled all-inorganic supercrystals
May 9, 2022
Big Idea: Understanding the Rules of Life

Self-assembly of nanocrystals into strongly electronically coupled all-inorganic supercrystals

Igor Coropceanu (University of Chicago), Eric M. Janke (University of Chicago), Joshua Portner (University of Chicago), Danny Haubold (University of Chicago, TechnischeUniversität Dresden), Trung Dac Nguyen (Northwestern University), Avishek Das (University of California, Berkeley), Christian P. N. Tanner (University of California, Berkeley), James K. Utterback (University of California, Berkeley), Samuel W. Teitelbaum (Arizona State University) ̧ Margaret H. Hudson (University of Chicago), Nivedina A. Sarma (University of Chicago), AlexM.Hinkle (University of Chicago), Christopher J. Tassone (SLAC National Accelerator), Alexander Eychmüller (TechnischeUniversität Dresden), David T. Limmer ((University of California, Berkeley, Lawrence Berkeley National Lab), Monica Olvera de la Cruz (Northwestern University), Naomi S. Ginsberg ((University of California, Berkeley, Lawrence Berkeley National Lab), Dmitri V. Talapin (University of Chicago, Argonne National Lab)    
At the University of Chicago MRSEC, we have demonstrated the self-assembly of charged nanocrystals into strongly electronically coupled supercrystals, a feature previously not possible with traditional insulating organic surface ligands.
Trainable shear memory in dense suspensions
Trainable shear memory in dense suspensions
May 9, 2022
Big Idea: Understanding the Rules of Life

Trainable shear memory in dense suspensions

H. Kim, G. L. Grocke, H. Zhang, S. N. Patel, S. J. Rowan, H. M. Jaeger, manuscript in preparation.         *All at the University of Chicago
A collaboration between the University of Chicago MRSEC groups of Jaeger, Patel, and Rowan showed that the complex modulus of a dense suspension of microparticles can be increased exponentially over several orders of magnitude by applying interval training during oscillatory shear, leading to a structural memory.
IRG2: Equitable COVID-19 Vaccines Through Materials Science
IRG2: Equitable COVID-19 Vaccines Through Materials Science
May 9, 2022
University of California - San Diego

IRG2: Equitable COVID-19 Vaccines Through Materials Science

The COVID-19 pandemic highlights the need for platform technologies enabling rapid development of vaccines for emerging viral diseases. The current vaccines target the SARS-CoV-2 spike (S) protein and thus far have shown tremendous efficacy. However, the need for cold-chain distribution, a prime-boost administration schedule, and the emergence of variants of concern (VOCs) call for diligence in novel SARS-CoV-2 vaccine approaches.
EHRD: Research Immersion in Materials Science & Engineering (RIMSE) Summer Schools
EHRD: Research Immersion in Materials Science & Engineering (RIMSE) Summer Schools
May 9, 2022
University of California - San Diego

EHRD: Research Immersion in Materials Science & Engineering (RIMSE) Summer Schools

Michael Sailor, Tod Pascal, Andra Tao, Jonathan Pokorski, Stacey Brydges; University of California San Diego
The UCSD MRSEC RIMSE Summer Schools prepare trainees to engage in research, in MRSEC labs and within UCSD at large. The program streamlines high school students, undergraduate students (with a particular focus on transfer students), REU students, and incoming graduate students into research programs in the domains covered by the two IRGs.
Heteroanionic Fluoride Doping in Indium Oxide Semiconductors
Heteroanionic Fluoride Doping in Indium Oxide Semiconductors
Apr 25, 2022
Big Idea: Harnessing the Data Revolution

Heteroanionic Fluoride Doping in Indium Oxide Semiconductors

This work represents the first study to establish fluoride as a universal amorphizing agent in the  indium oxide system, and by inference, may play a similar role in related oxide semiconductor materials.
Tuning Optoelectronic Properties with Mixed-Dimensional Heterostructures
Tuning Optoelectronic Properties with Mixed-Dimensional Heterostructures
Apr 25, 2022
Big Idea: Quantum Leap

Tuning Optoelectronic Properties with Mixed-Dimensional Heterostructures

Lattice defects play an important role in determining the optical and electrical properties of monolayer semiconductors such as MoS2. Although the structures of various defects in monolayer MoS2 are well studied, little is known about the properties of the fluorescent defect species and their interaction with molecular adsorbates.
Leaders in Innovation: New Startups Addressing Societal Problems
Leaders in Innovation: New Startups Addressing Societal Problems
Apr 6, 2022
Big Idea: Future of Work at the Human-Technology Frontier

Leaders in Innovation: New Startups Addressing Societal Problems

The Harvard MRSEC provides a vibrant culture of entrepreneurship and several recent Ph.D. students supported by Center IRGs and seed projects have co-founded new companies. 
(A) Design principle to achieve diverse deformation trajectories: misalignment of molecular anisotropy (M), microstructure geometry (G), and light (L). (B) Formation of a transient propagating bimorph in a single material by directional light-activation with a stationary light source. (C) Upon irradiation from opposite sides, the same microstructure displays mirrored right- and left-handed curved stroke-like trajectories, which are captured by FE modeling. (D) Spontaneous self-organization of strings of microposts into an undulating line. Modeling results on the right. (E) Simulation and experimental results of X-shaped jointed compositionally uniform microactuators exhibit twisting/rotation of the stem and amplified sway motion of the horizontal arms.
(A) Design principle to achieve diverse deformation trajectories: misalignment of molecular anisotropy (M), microstructure geometry (G), and light (L). (B) Formation of a transient propagating bimorph in a single material by directional light-activation with a stationary light source. (C) Upon irradiation from opposite sides, the same microstructure displays mirrored right- and left-handed curved stroke-like trajectories, which are captured by FE modeling. (D) Spontaneous self-organization of strings of microposts into an undulating line. Modeling results on the right. (E) Simulation and experimental results of X-shaped jointed compositionally uniform microactuators exhibit twisting/rotation of the stem and amplified sway motion of the horizontal arms.
Apr 6, 2022
Big Idea: Future of Work at the Human-Technology Frontier

Self-Regulated Non-Reciprocal Motions in Liquid Crystal Elastomer Pillars

A team at the Harvard MRSEC led by Bertoldi and Aizenberg has developed an approach to achieve a diverse trajectories from a single-material system via self-regulation: when a photoresponsive liquid crystal elastomeric pillar with mesogen alignment is exposed to light, it ‘dances’ dynamically as light initiates a traveling order-to-disorder transition front that twists and bends via opto-chemo-mechanical feedback.

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