Multi‐Ion Doping in Low‐Phonon‐Energy Nd3+ Based Double Perovskite Unlocks Multimodal Anti‐Counterfeiting and High‐Performance Optical Thermometry - Xin - Advanced Functional Materials - Wiley Online Library advanced.onlinelibrary.wiley.com/doi/10.1002/...

Multi‐Ion Doping in Low‐Phonon‐Energy Nd3+ Based Double Perovskite Unlocks Multimodal Anti‐Counterfeiting and High‐Performance Optical Thermometry

Multi-ion engineering in low-phonon Nd-based double perovskites enables excitation-programmable multicolor UC/DS emission and record-sensitivity multi-channel optical thermometry for advanced anti-co...

advanced.onlinelibrary.wiley.com

Honored to have our work on #photonAvalanchingNanoparticles with @askripka.bsky.social be selected as one of @berkeleylab.lbl.gov's top stories of 2025. Read the original article here: doi.org/10.1038/s415...

Intrinsic optical bistability of photon avalanching nanocrystals - Nature Photonics

Intrinsic optical bistability in Nd3+-doped KPb2Cl5 avalanching nanoparticles enables high-contrast switching between luminescent and non-luminescent states and transistor-like optical responses. A no...

doi.org

Berkeley Lab@berkeleylab.lbl.gov · 8mo ago

2025 was filled with remarkable breakthroughs at our Lab, from developing new materials and exploring the universe to making strides in #AI, #microelectronics, and #quantum science. Plus, we celebrated our 17th Nobel Prize! 🏅 Explore our top stories ➡️ newscenter.lbl.gov/2025/12/17/b...

Out in @natcomputsci.nature.com: A roadmap for inverse design of #nanomaterials heterostructures via HT data gen -> representation dev -> heteroGNN training -> gradient-based global opt! w/ @emorychannano.bsky.social @ewcspottesmith.bsky.social www.nature.com/articles/s43... Free link rdcu.be/eTH72

Gradient-based optimization of complex nanoparticle heterostructures enabled by deep learning on heterogeneous graphs - Nature Computational Science

Graph neural networks built on physically motivated representations enable gradient-based optimization of complex upconverting nanoparticle heterostructures, revealing photophysical design rules and a...

nature.com

For a more digestible summary of our recent @natcomputsci.nature.com article, here's the research brief that @samblau.bsky.social and I wrote... complete with a #BehindThePaper tidbit that thankfully has less drama than a VH1 Behind the Music episode (free link: rdcu.be/eUVIw)

Nature Computational Science@natcomputsci.nature.com · 8mo ago

An accompanying Research Briefing is now available for this paper! www.nature.com/articles/s43... 🔓 rdcu.be/eUVIw

We're still looking for motivated postdoc candidates for this exciting opportunity. See below and please repost!

Emory Chan@emorychannano.bsky.social · 11mo ago

Love building microscopes? Looking for a #postdoc? Come work w/ me, Ed Barnard, Jim Schuck, Bruce Cohen & others @berkeleylab.lbl.gov developing a #photonAvalanching microscope for bio & environmental sensing! Description below: #jobs #nonlinear #optics #photonics drive.google.com/file/d/1Qcof...

Our manuscript on deep learning of upconverting nanoparticle heterostructures w/ @samblau.bsky.social is finally out in @natcomputsci.nature.com! See 🧵for links to free access via Readcube and chemrxiv. @berkeleylab.lbl.gov @molecularfoundry.lbl.gov @mitcheme.bsky.social

Nature Computational Science@natcomputsci.nature.com · 8mo ago

📢 @emorychannano.bsky.social, @samblau.bsky.social and colleagues develop a DL approach for optimizing the nonlinear optical properties of core-shell upconverting nanoparticles, uncovering photophysical design rules and a roadmap for DL in nanoscience. www.nature.com/articles/s43... 🔓 rdcu.be/eTH72

Congrats to @molecularfoundry.lbl.gov users Yunxiang Zhang and Qian Liu for their latest work in @natcomms.nature.com: "Sub-10 nm upconversion nanocrystals for long-term single-particle tracking." doi.org/10.1038/s414.... w/ Chan group postdoc Xiaojing Xia on on the kinetic Monte Carlo #KMC #UCNPs

Sub-10 nm upconversion nanocrystals for long-term single-particle tracking - Nature Communications

This study presents ultrasmall, bright lanthanide-doped upconversion nanoparticles that overcome surface quenching, enabling high spatiotemporal resolution tracking of membrane proteins with exception...

doi.org

Love building microscopes? Looking for a #postdoc? Come work w/ me, Ed Barnard, Jim Schuck, Bruce Cohen & others @berkeleylab.lbl.gov developing a #photonAvalanching microscope for bio & environmental sensing! Description below: #jobs #nonlinear #optics #photonics drive.google.com/file/d/1Qcof...

We have a postdoc opening w/ @samblau.bsky.social on the autonomous synthesis of colloidal upconverting nanoparticles. If you're looking for an exciting postdoc combining #robotics, #nanochemistry, #machinelearning, #UCNPs & simulations, see the link below! combinano.lbl.gov/openings

Chan Group @ Molecular Foundry - openings

The Chan group welcomes inquiries for motivated, creative, and independent researchers at all levels (postdoctoral fellow, graduate students, undergraduates, and visitors), even in the absence of post...

combinano.lbl.gov

⚡ Level up your research skills! Our 2.5-day Summer School will teach you closed-loop experiment design, data visualization, and robotic synthesis using cutting-edge platforms. Open to all students & postdocs! Register today: bit.ly/3Z5Uf8m #FutureOfScience #Automation

Congrats to @molecularfoundry.lbl.gov users Rui Chen and Jie Yao on their publication in @natcomms.nature.com! doi.org/10.1038/s414...

Room-temperature multiferroicity in sliding van der Waals semiconductors with sub-0.3 V switching - Nature Communications

The authors observe out-of-plane ferroelectric polarization induced by interlayer sliding in a multiferroic van der Waals semiconductor. The switching voltage scales down to 0.3 V at room temperature,...

doi.org

2 #S25MRS talks down, 1 proposal submitted (internally). Time to take an ebike ride around Seattle before my flight!It's so nice here... great choice, MRS.

Check out my 2 talks at #S25MRS this week in Seattle!

@mphendricks.bsky.social, Michael Campos & the rest of Jon Owen's lab were some of the greatest WANDA users of all time. They took LBNL by storm with boxes of distilled solvents and custom precursors. They showed that robots are pointless if the other parts of your workflow are not reproducible.

Mark Hendricks@mphendricks.bsky.social · last yr.

Working with WANDA (and Emory!) was one of the highlights of my PhD, and I’m looking forward to my group returning someday to take advantage of these amazing tools. Also excited for the Automating Chemical Laboratories Scialog conference this week to think about how the field moves into the future!

I can't believe it's been 15 years since this paper came out! We introduced a nanocrystal-synthesizing robot called WANDA to the world! Now robots & ML are all the rage, but WANDA was a pioneer & is still going strong. @deliamilliron.bsky.social @molecularfoundry.lbl.gov pubs.acs.org/doi/full/10....

Reproducible, High-Throughput Synthesis of Colloidal Nanocrystals for Optimization in Multidimensional Parameter Space

While colloidal nanocrystals hold tremendous potential for both enhancing fundamental understanding of materials scaling and enabling advanced technologies, progress in both realms can be inhibited by...

pubs.acs.org

New article online: Intrinsic optical bistability of photon avalanching nanocrystals. go.nature.com/3DSOmUC

pubs.aip.org/physicstoday...

Up-conversion nanoparticles measure medium-sized forces in hard-to-reach places

Squeezing the tiny crystals can dramatically change their photophysics.

pubs.aip.org

Thinking of submitting a user proposal to the @molecularfoundry.lbl.gov or any other scientific user facility? Here are my Top 10 tips for writing a Foundry proposal (due March 27th!). These #ProTips should be relevant for most user facilities! 🧵

Check out our perspective article in @materialshorizons.rsc.org where we bust common myths about Photon Avalanching Nanoparticles! doi.org/10.1039/D4MH... Learn why photon avalanches are not avalanches of photons and many other fun facts about ANPs. #chemsky 🧪 See 🧵 below for more myths and art.

Unraveling the myths and mysteries of photon avalanching nanoparticles

Photon avalanching (PA) nanomaterials exhibit some of the most nonlinear optical phenomena reported for any material, allowing them to push the frontiers of applications ranging from nanoscale imaging...

doi.org

📢 The Molecular Foundry's Spring 2025 Proposal Call is now open through March 27! 🎉 Get free access to world-class nanoscale science facilities and expert support to advance your research. Don’t miss this opportunity—get the details now! buff.ly/InlHUYU

Check out @berkeleylab.lbl.gov's highlight of our latest work in @naturephotonics.bsky.social! 🧪 #chemsky #physky

Berkeley Lab@berkeleylab.lbl.gov · last yr.

RESEARCH NEWS: Our scientists have developed photon-avalanching nanoparticles that exhibit a phenomenon called “intrinsic optical bistability,” which could enable optical memory for #OpticalComputing. @molecularfoundry.lbl.gov 🧪 #TechInnovation

Breakfast under blue skies @molecularfoundry.lbl.gov

🚀Thrilled to share our light-twisting materials from semiconductor nanoclusters! Films of CdS magic-sized clusters helically assembled with record g-factors and large homochiral domains. Congrats to Tom, River, Reilly, Haoyang & Frank! www.science.org/doi/10.1126/science.ado7201 #Chiroptics

Transforming achiral semiconductors into chiral domains with exceptional circular dichroism

Highly concentrated solutions of asymmetric semiconductor magic-sized clusters (MSCs) of cadmium sulfide, cadmium selenide, and cadmium telluride were directed through a controlled drying meniscus fro...

science.org

Just a bump for this starter pack - as always happy to add more folks, just post below anywhere you see me post it and I will add you go.bsky.app/U5wGm7M

Congrats to Ahn Pan for his final paper from his postdoc @molecularfoundry.bsky.social in Nanoscale Horizons @nanoscale-journals.bsky.social Read how inorganic metal sulfide ligands w/ low phonon energies can enhance the PL of upconverting nanoparticles 🧵🧪#chemsky DOI doi.org/10.1039/D4NH...

Enhanced upconversion and photoconductive nanocomposites of lanthanide-doped nanoparticles functionalized with low-vibrational-energy inorganic ligands

Upconverting nanoparticles (UCNPs) convert near-infrared (IR) light into higher-energy visible light, allowing them to be used in applications such as biological imaging, nano-thermometry, and photode...

doi.org

#ActuallyProud to share our latest work in @naturephotonics.bsky.social demonstrating intrinsic optical stability in photon avalanching nanoparticles! doi.org/10.1038/s415... Read on to learn how these nanoparticles are like Gwyneth Paltrow 👱‍♀️, and how that’s useful for optical computing.

We started 2025 in full force w/ a new @nature.com pub on 1/1/25 using photon avalanching nanoparticles to sense pN-nN forces with infrared light! Work co-led w/ Bruce Cohen @molecularfoundry.bsky.social & Jim Schuck @columbiauniversity.bsky.social 🧵 www.nature.com/articles/s41...

Check out NPMC, a kinetic Monte Carlo package for predicting optical spectra of lanthanide-doped materials like the complex core/shell nanoparticles we synthesize. NPMC is part of RNMC, a kMC implementation for reaction networks reported in @joss-openjournals.bsky.social: doi.org/10.21105/jos... 🧪🧵

RNMC: kinetic Monte Carlo implementations for complex reaction networks

Zichi et al., (2024). RNMC: kinetic Monte Carlo implementations for complex reaction networks. Journal of Open Source Software, 9(104), 7244, https://doi.org/10.21105/joss.07244

doi.org

New to bluesky but have a lot of new papers to talk about! First up: a quantum dot (QD) solid state lighting pub co-led by Jonathan Owen's group at Columbia: 🧵https://pubs.acs.org/doi/abs/10.1021/acs.jpcc.4c07446

One Pot Synthesis of Cyan Emitting CdZnSSe Quantum Dots for Human Centric Lighting

A one pot synthesis of blue and green emissive CdZnSSe quantum dots (QDs) from thio- and selenoureas and Cd and Zn carboxylates is optimized using high throughput robotic optimization. A large set of ...

pubs.acs.org

Our work on the optical bistability of avalanching nanoparticles is now out! These tiny crystals are among the most nonlinear nanomaterials reported and exhibit luminescence hysteresis, which is valuable in advancing optical computing and memory. @molecularfoundry.bsky.social #MSCA rdcu.be/d5pT7

Intrinsic optical bistability of photon avalanching nanocrystals

Nature Photonics - Intrinsic optical bistability in Nd3+-doped KPb2Cl5 avalanching nanoparticles enables high-contrast switching between luminescent and non-luminescent states and transistor-like...

rdcu.be