Article 13 November 2024 | Open Access Exactly defined molecular weight poly(ethylene glycol) allows for facile identification of PEGylation sites on proteins PEGylation, the covalent attachment of one or more poly(ethylene glycol) (PEG) units to a therapeutic, is commonly used in the pharmaceutical industry, but the dispersity of PEGylation agents results in batch-to-batch variations and analytical limitations. Here, the authors present an approach to overcome these limitations by manufacturing a defined molecular weight, dispersity-free, 5 kDa methoxy PEG-succinimidyl propionate (mPEG-SP5135) using Nanostar Sieving. Maria J. Burggraef, Adam Oxley & Andrew G. Livingston Article 13 November 2024 | Open Access Orbital-selective effect of spin reorientation on the Dirac fermions in a non-charge-ordered kagome ferromagnet Fe3Ge Kagome lattices exhibit notable rich physics, however, there has been only limited study of the influence of magnetic ordering on the electronic structure. Here, by combining angle-resolved photoemission spectroscopy and first principles calculations, Lou et al. find that the spin reorientation transition has an orbital-selective effect on the Dirac fermions of the kagome material, Fe3Ge. Rui Lou, Liqin Zhou & Shancai Wang Article 13 November 2024 | Open Access Phase-transformable metal-organic polyhedra for membrane processing and switchable gas separation The capability of materials to interconvert between phases enables greater control over properties without additional chemical modification but can result in a sacrifice of porosity. Here, the authors synthesize metal-organic polyhedra that interconvert between the liquid-glass-crystal phases and develop a membrane with enhanced porosity and CO2 selectivity. Po-Chun Han, Chia-Hui Chuang & Shuhei Furukawa Article 13 November 2024 | Open Access Ultra-inert lanthanide chelates as mass tags for multiplexed bioanalysis Lanthanide coordination compounds are indispensable in biomedical applications yet there has been limited progress on improving their thermodynamic stability and kinetic inertness. Here, the authors report the coordination-templated formation of a 1,5-triazole bridge that improves kinetic inertness up to a million-fold relative to DOTA. Tomáš David, Miroslava Šedinová & Miloslav Polasek Article 13 November 2024 | Open Access Light patterning semiconductor nanoparticles by modulating surface charges The integration of colloidal nanoparticles into microdevices is essential for several advanced technologies. Here, the authors have developed a scalable method of UV-triggered surface charge modulation for the rapid surface patterning with semiconductor nanoparticles. Xiaoli He, Hongri Gu & Chengzhi Hu Article 13 November 2024 | Open Access Hierarchically conductive electrodes unlock stable and scalable CO2 electrolysis Conventional electrochemical CO2 conversion electrodes are bound by a tradeoff which prevents electrodes from being both stable and scalable. Here the authors develop a composite electrode which achieves both, enabling scaling to a 50 cm2 electrode with low ohmic losses. Simon Rufer, Michael P. Nitzsche & Kripa K. Varanasi Article 13 November 2024 | Open Access Transport chirality generated by a tunable tilt of Weyl nodes in a van der Waals topological magnet The possibility of tuning the shape of the Weyl nodes in topological magnets could open an avenue towards engineering their electrical behaviour. Here, the authors report the tuning of Weyl nodes and associated magnetotransport in MnSb2Te4 by diffusion-controlled ionic hydrogen insertion. Afrin N. Tamanna, Ayesha Lakra & Lia Krusin-Elbaum Article 13 November 2024 | Open Access Proton-exchange induced reactivity in layered oxides for lithium-ion batteries The sensitivity of Li-ion battery materials to moisture complicates their synthesis, storage, processing and recycling. Here, authors show that protonation causes structural instability in LiNixCoyMn1-x-yO2 (0