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We report the synthesis of functionalized nanodots as potential powerful blockers of solute transport through a chitoporin. Ultrasmall silica nanocapsules with a diameter of ∼ 6 nm were coated with chitooligosaccharides to be used as a "lid" binding to the opening of the chitoporin VhChiP of Vibrio campbellii. Efficient blocking is attributed to the adequate size of the nanodots and their functionalization with oligochitosan, which has strong affinity towards the Vibrio chitoporin. This strategy paves the way towards the development of nanomaterials for blocking other porins., Competing Interests: Declaration of Competing Interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Daniel Crespy, Wipa Suginta reports financial support was provided by Vidyasirimedhi Institute of Science and Technology. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)