Chemically orthogonal three-patch microparticles

Sahar Rahmani, Sampa Saha, Hakan Durmaz, Alessandro Donini, Asish C. Misra, Jaewon Yoon, Joerg Lahann*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)


Compared to two-dimensional substrates, only a few methodologies exist for the spatially controlled decoration of three-dimensional objects, such as microparticles. Combining electrohydrodynamic co-jetting with synthetic polymer chemistry, we were able to create two- and three-patch microparticles displaying chemically orthogonal anchor groups on three distinct surface patches of the same particle. This approach takes advantage of a combination of novel chemically orthogonal polylactide-based polymers and their processing by electrohydrodynamic co-jetting to yield unprecedented multifunctional microparticles. Several micropatterned particles were fabricated displaying orthogonal click functionalities. Specifically, we demonstrate novel two- and three-patch particles. Multi-patch particles are highly sought after for their potential to present multiple distinct ligands in a directional manner. This work clearly establishes a viable route towards orthogonal reaction strategies on multivalent micropatterned particles. Patchwork family: Three-patch microparticles (see scheme) containing functionalized poly(lactide) derivatives in select compartments were fabricated through the electrohydrodynamic (EHD) co-jetting process. The microparticles were characterized by Raman confocal microspectroscopy and the bio-orthogonal surface modification of each patch was demonstrated.

Original languageEnglish
Pages (from-to)2332-2338
Number of pages7
JournalAngewandte Chemie - International Edition
Issue number9
Publication statusPublished - 24 Feb 2014
Externally publishedYes


FundersFunder number
U.S. Department of DefenseW81XWH-11-1-0111
National Institute of Dental and Craniofacial ResearchT32DE007057


    • click chemistry
    • electrohydrodynamic co-jetting
    • microparticles
    • orthogonal chemistry
    • surface chemistry


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