Thomas M Truskett
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tmtruskett.bsky.social
Thomas M Truskett
@tmtruskett.bsky.social
1.2K followers 4.3K following 18 posts
soft matter; higher education; technology impacts; Texas trails; views expressed are mine and not those of any group, org, or institution
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tmtruskett.bsky.social
Brian Rosenberg provides context on institutional neutrality www.chronicle.com/article/univ...
Highlighted text: “It is one thing to stay away from debates about the wisdom of tariffs or of annexing Canada; it is quite another to remain silent on the question of whether evidence and expertise matter, whether teaching and research should be free from governmental censorship, and whether students from historically underrepresented groups should have appropriate support on campus.”
March 7, 2025 at 1:49 PM
tmtruskett.bsky.social
Final note from Bob Brown's "Will the American research university make it to its 100th birthday?" www.elsevier.com/connect/will...
Text that reads "When this essay was drafted, I never conceived of the precipitous damage that was possible by thoughtless policy changes — like last week’s retraction of federal support by mandating a cap on NIH’s reimbursement of facilities and administrative costs. This move would ravage research universities in a single stoke and would essentially throw in the towel on US leadership in science and technology. It may not be a question of research universities surviving another 25 years; all that we have been building could be undone in less than 25 days."
February 20, 2025 at 1:33 PM
tmtruskett.bsky.social
Colloidal hard spheres: Triumphs, challenges, and mysteries. Great review article by Royall, Charbonneau, Dijkstra, Russo, Smallenburg, Speck, & Valeriani journals.aps.org/rmp/abstract...
Optical observation of colloidal hard-sphere phases (fluid, crystal, & glass) From https://doi.org/10.1103/RevModPhys.96.045003
November 13, 2024 at 4:05 PM
tmtruskett.bsky.social
Intense near-field hot spots for all polarization angles could be harnessed for enhanced molecular detection, non-linear optics, or light harvesting, with the potential for integration with photonic devices. 5/5
Left: Map of dipoles at resonance for in-plane excitation of a mixed NC assembly showing relatively even intensity of hot spots between NCs, also shown in cross section where hot spots are seen at the mid-point in the monolayer. Right: Map of dipoles at resonance for out-of-plane excitation of a mixed NC assembly showing strong polarization only for highly doped NCs and hot spots concentrated between NC with high doping, also shown in cross-section where hot spots are seen at the mid-point in the monolayer. Credit: Nano Letters paper at the top of the thread.
August 10, 2023 at 8:22 PM
tmtruskett.bsky.social
Mixing off-resonant NCs allows tuning the resonant frequencies and bandwidths for reflection, absorption, and where the dielectric function is near zero (ENZ), rationalized by large-scale optical simulations. See https://pubs.acs.org/doi/10.1021/acs.nanolett.3c00429 4/5
Left: Map of Re(eps) vs frequency (y-axis) and portion of 1% ITO NCs in mixture (x-axis) showing how resonance features and ENZ region change with mixing. Right: Dipole map of a mixed assembly showing opposing dipoles in two colors of balls representing ITO with different % Sn and resulting in hot spots between the nanocrystals. Credit: Nano Letters paper at top of the thread.
August 10, 2023 at 8:20 PM
tmtruskett.bsky.social
The doping-tunable interaction of ITO NCs with light via plasmon resonance is amplified when NCs are coupled together in assemblies, creating strong in- and out-of-plane collective resonance. 3/5
Left: Extinction vs frequency with three lines, one each for 1%, 3%, and 6% Sn in ITO NCs, each having a peak at a different frequency. Right: Dipole vs frequency. Top right: Low frequency peak changes in intensity with angle, zero degree is most intense polarization in-plane and 90 degree shows no in-plane dipole. Bottom right: High frequency peak changes in intensity with angle, 90 degree is most intense polarization out-of-plane and 90 degree shows no dipole. Credit: Nano Letters paper at top of the thread
August 10, 2023 at 8:17 PM
tmtruskett.bsky.social
Mixing tin-doped indium oxide (ITO) nanocrystals (NCs) with different %Sn in metasurface assemblies gives widely tunable collective infrared optical properties. 2/5
A close-packed single layer of 30 nm ITO shown in SEM in the background of two schematic dielectric functions. Left one is for single-component assembly with all nanocrystals having the same dipole oriented parallel, with a Lorentz oscillator line shape to the real part of the dielectric function and a narrow ENZ region where Re(eps) is between -1 and 1. The right one is for a mixed assembly with two colors of balls representing two doping levels of % Sn in ITO nanocrystals having opposite dipole moments. The Re(eps) function is more wiggly and stays near zero for a wider region. Credit: Nano Letters paper at top of the thread
August 10, 2023 at 8:15 PM
tmtruskett.bsky.social
The doping-tunable interaction of ITO NCs with light via plasmon resonance is amplified when NCs are coupled together in assemblies, creating strong in- and out-of-plane collective resonance. 3/3
Left: Extinction vs frequency with three lines, one each for 1%, 3%, and 6% Sn in ITO NCs, each having a peak at a different frequency. Right: Dipole vs frequency. Top right: Low frequency peak changes in intensity with angle, zero degree is most intense polarization in-plane and 90 degree shows no in-plane dipole. Bottom right: High frequency peak changes in intensity with angle, 90 degree is most intense polarization out-of-plane and 90 degree shows no dipole. Credit: Nano Letters paper shared in this thread
August 10, 2023 at 7:57 PM
tmtruskett.bsky.social
Making plans for #ACSFall2023? Check out the Colloidal Networks symposium from Tues-Thurs, featuring 40 speakers from 7 countries covering theory & experiment; nanocrystals, polymers, & more.🧪#chemsky
Promotional banner for the Colloidal Networks symposium and the Fall ACS Meeting in San Francisco. A micrograph and a computer-simulated configuration of colloidal gel strands are pictured. There is a list of invited speakers and sponsor logos. Invited Speakers: Surita Bhatia, Stonybrook Nadja Bigall, U. Hannover Stephanie Brock, Wayne State Ramon Castaneda-Priego, Guanajuato Yamil Colón, Notre Dame Jacinta Conrad, U. Houston Jairo Diaz Amaya, RIT Lorna Dougan, Leeds Glen Hocky, NYU Lilian Hsiao, NC State Euan Kay, St. Andrews Fardin Khabaz, U. Akron Eugenia Kumacheva, Toronto Delia Milliron, UT Austin Ryan Poling-Skutvik, Rhode Island Simon Rogers, UIUC Adrianne Rosales, UT Austin Takamasa Sakai, U. Tokyo Omar Saleh, UCSB Florian Schulz, U. Hamburg Thomas Truskett, UT Austin Sponsors: Journal of Chemical Physics Dow RSC Applied Polymers Soft Matter RSC Applied Interfaces Polymer Chemistry image credits: micrograph (Jiho Kang), simulated configuration (Zachary Sherma
August 7, 2023 at 6:29 PM