Milos Dubajic
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mdubajic.bsky.social
Milos Dubajic
@mdubajic.bsky.social
6 followers 19 following 2 posts
Postdoc at the University of Cambridge.

Crystallography, optical microscopy and ultrafast spectroscopy.
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mdubajic.bsky.social
How to check the epitaxial relationship of an orthorhombic film on a monoclinic substrate?

In our Science paper led by Yang Lu, I helped with SC-XRD to solve this complex puzzle! 🧩

See the atomistic model of PEA₂PbBr₄/CsPbBr₃ heterostructure we extracted in the animation below! 👇
November 18, 2025 at 11:56 PM
Reposted by Milos Dubajic
aronwalsh.github.io
Worth checking the post today! Proud of this paper and nice to see it in physical form www.nature.com/articles/s41... #ChemSky #Perovskite
Photograph of a journal cover of Nature Nanotechnology illustrating a tilted domain in a perovskite crystal
July 21, 2025 at 5:05 PM
Reposted by Milos Dubajic
natnano.nature.com
In our June 2025 issue, we cover

- Next-generation perovskite photovoltaics,
- DNA computing & data storage,
- Majorana stability,
- Superelasticity in GeSe ceramics,
- Li batteries,
- Pt nanocatalysts,
- mRNA vaccines against malaria, & much more.

www.nature.com/nnano/volume...
The cover image captures a snapshot of the cubic methylammonium lead tribromide perovskite lattice dynamics, revealing a picosecond-lived octahedral out-of-phase tilt nanodomain that has a significant influence on the material's macroscopic performance. Dubajic, M., et al. Nat. Nanotechnol. 20, 755–763 (2025). https://doi.org/10.1038/s41565-025-01917-0 Abstract Lead halide perovskites have emerged as promising materials for solar energy conversion and X-ray detection owing to their remarkable optoelectronic properties. However, the microscopic origins of their superior performance remain unclear. Here we show that low-symmetry dynamic nanodomains present in the high-symmetry average cubic phases, whose characteristics are dictated by the A-site cation, govern the macroscopic behaviour. We combine X-ray diffuse scattering, inelastic neutron spectroscopy, hyperspectral photoluminescence microscopy and machine-learning-assisted molecular dynamics simulations to directly correlate local nanoscale dynamics with macroscopic optoelectronic response. Our approach reveals that methylammonium-based perovskites form densely packed, anisotropic dynamic nanodomains with out-of-phase octahedral tilting, whereas formamidinium-based systems develop sparse, isotropic, spherical nanodomains with in-phase tilting, even when crystallography reveals cubic symmetry on average. We demonstrate that these sparsely distributed isotropic nanodomains present in formamidinium-based systems reduce electronic dynamic disorder, resulting in a beneficial optoelectronic response, thereby enhancing the performance of formamidinium-based lead halide perovskite devices. By elucidating the influence of the A-site cation on local dynamic nanodomains, and consequently, on the macroscopic properties, we propose leveraging this relationship to engineer the optoelectronic response of these materials, propelling further advancements in perovskite-based photovoltaics, optoelectronics, and X-ray imaging.
June 23, 2025 at 7:42 AM
Reposted by Milos Dubajic
lasermike.bsky.social
Finally published in @natnano.nature.com, this work shows how A-site cation in perovskites influences dynamic nanodomains, fleeting pockets of tilted octahedra, lurking in the lattice. Nanoscale crystallography driving macroscopic performance! www.nature.com/articles/s41...
Dynamic nanodomains dictate macroscopic properties in lead halide perovskites - Nature Nanotechnology
Dynamic nanodomains in lead halide perovskites, dictated by A-site cations, crucially affect the optoelectronic properties by modulating electronic disorder and consequently enabling better solar cell...
www.nature.com
June 2, 2025 at 11:48 PM