Aggregate aims to publish on a wide variety of topics that focus on the processes of aggregation of atoms, ions, molecules, oligomers, polymers, clusters, particles, gels, hybrids, composites, cells, pathogens, etc. in a broad range of areas such as chemistry, physics, materials, engineering, biology and life science. Aggregates often behave differently from, and exhibit advanced functionalities inaccessible by, single molecular species, which offers exciting possibilities to new sciences and innovations in multiple dimensions at high structural hierarchies across disciplinary boundaries. The scope of Aggregate is broad, including but not limited to synthesis, characterization, morphology, nanoparticles, hybrids, composites, metal-organic frameworks, chirality, helicity, supramolecular self-assembly, stimuli-responsive systems, clean energy, luminescence processes, photophysical mechanisms, optoelectronic devices, photovoltaic cells, aggregation-induced emission, polarized luminescence, room-temperature phosphorescence, fluorescent probes, chemical sensing, biomedical imaging, theranostics, drug delivery, photodynamic and photothermal therapies, etc. The journal recognizes system complexity and particularly welcomes innovative multidisciplinary research with high impact.