Technique - (7) Multi-trap optical tweezers with superresolution microscopy and microfluidics

Type: Experimental

Description: Combined 4-trap optical tweezers (LUMICKS C-Trap) with STED super-resolution microscopy and microfluidics for single-molecule biophysics — allows simultaneous force measurement and sub-diffraction imaging.

Department(s)/lab(s): BioNanoscience / Kavli Institute of Nanoscience | Marie-Eve Aubin-Tam Lab — Single-Molecule Cell Biophysics @ TU Delft
Summary:

Marie-Eve Aubin-Tam (Associate Professor, BioNanoscience) uses single-molecule tools to study membrane proteins and cell biophysics. Research: (1) optical tweezers protein unfolding — mechanical unfolding of membrane proteins to probe folding landscape; (2) single-molecule cell biophysics — force spectroscopy on live cells; (3) synthetic biology applications — integrating engineered proteins with biophysical tools.

Department(s)/lab(s): Physics / Niels Bohr Institute | BendixLab — Biophotonics & Mechanobiology @ UCPH
Summary:

Poul Martin Bendix (Associate Professor, BendixLab/NBI) investigates physical properties of living cells using advanced optical techniques. Research: (1) optical tweezers for mechanosensing — GPCR mechanosensing with picoNewton force resolution, membrane curvature sensing by proteins (annexins, BAR-domain proteins); (2) thermoplasmonics — gold nanoparticle laser heating for controlled membrane microsurgery, cell fusion, and plasma membrane repair; (3) single-molecule biophysics — DNA-protein interactions using 4-trap optical tweezers (LUMICKS C-Trap) with STED imaging; (4) filopodia dynamics — twist and rotation of actin filaments; (5) Brillouin microscopy for cell mechanics; (6) COBM center management. GPCRmec consortium (Novo Nordisk). 2026 BPS Annual Meeting featured.

Department(s)/lab(s): BioNanoscience / Kavli Institute of Nanoscience | Nynke Dekker Lab — Single-Molecule DNA Biophysics @ TU Delft
Summary:

Nynke Dekker (Full Professor, BioNanoscience) leads single-molecule biophysics of DNA replication and topology. Research: (1) single-molecule force-fluorescence microscopy — integrated optical tweezers and fluorescence for real-time imaging of replication machinery; (2) DNA topology — supercoiling, gyrase, topoisomerase dynamics with magnetic tweezers; (3) DNA/RNA-processing molecular motors. EMBO member; KNAW member. 2024 integrated force-fluorescence toolbox published.

Department(s)/lab(s): BioNanoscience / Kavli Institute of Nanoscience | Marileen Dogterom Lab — Cytoskeleton & Cell Biophysics @ TU Delft
Summary:

Marileen Dogterom (Full Professor, BioNanoscience) studies cytoskeleton dynamics and synthetic cell construction. Research: (1) microtubule dynamics — force generation, catastrophe control, and mitotic spindle assembly reconstituted in vitro; (2) cell division reconstitution — building minimal synthetic cells with controlled division; (3) optical tweezers and fluorescence microscopy for force measurement on single cytoskeletal elements. Co-founded BioNanoscience department.

Department(s)/lab(s): BioNanoscience / Kavli Institute of Nanoscience | Chirlmin Joo Lab — Single-Molecule RNA and CRISPR @ TU Delft
Summary:

Chirlmin Joo (Full Professor, BioNanoscience) uses single-molecule fluorescence to study RNA dynamics and CRISPR-Cas. Research: (1) single-molecule FRET and direct RNA imaging — visualizing RNA folding, ribozyme catalysis, and mRNA translation dynamics; (2) CRISPR-Cas mechanism — real-time observation of Cas9 and Cas13 target search and cleavage; (3) nanopore-based protein sensing integration with optical tools. ERC Grant.

Department(s)/lab(s): BioNanoscience / Kavli Institute of Nanoscience | Gijsje Koenderink Lab — Active Matter & Cell Biomechanics @ TU Delft
Summary:

Gijsje Koenderink (Full Professor, BioNanoscience) investigates active and passive mechanics of the cytoskeleton. Research: (1) active matter — motor-filament composite networks generating spontaneous mechanical activity; (2) cell mechanics — cytoskeletal contributions to cell shape, migration, and division; (3) biomaterials — designing synthetic cytoskeletal analogues; (4) optical tweezers and AFM rheology of reconstituted networks. Spinoza Prize 2021. ERC Advanced Grant.

Department(s)/lab(s): School of Physics | Reece Optical Trapping and Nanophotonics Laboratory @ UNSW
Summary:

Reece runs UNSW's optical trapping and nanophotonics laboratory. The group combines optical tweezers with spectroscopy and microfluidics to characterise individual nanoparticles and cells: trapping and spectroscopically interrogating plasmonic core-satellite assemblies (with Gooding and Tilley), measuring single-cell mechanics, and building porous-silicon and photonic-crystal resonant structures for label-free biosensing where the analyte shifts a cavity resonance. Positioned against the established body of NV-ensemble quantum sensing work — DEER, nanoscale NMR and T1 relaxometry protocols operating at pT/sqrt(Hz) field sensitivity — optical trapping is the standard way to hold a nanoscale sensor — including a nanodiamond hosting an NV ensemble at pT/sqrt(Hz) — at a controlled position inside a cell or fluid, and levitated-nanodiamond spin-mechanics is an active field that this group's capabilities map onto almost exactly. Strong practical fit for a bio-oriented quantum sensing candidate.