Joniska och opto-elektroniska sensorer (engelska)

We work across the boundaries in electronics, optics and fluidics to develop sensors for healthcare applications as well as for investigating fundamental biological questions.

We believe in technologies that enable predictive diagnosis and pre-emptive therapies, ultimately allowing for prevention of diseases. This mission necessitates sophistication in future healthcare devices in terms of throughput, sensitivity and portability. Using micro- and nanoscale technologies on silicon platform, we strive to bring this mission into a reality.

Electronics and fluidics

We develop electronics and fluidics-based sensor technologies for bio-detection and molecular analysis by exploiting hydrodynamic and electrostatic signature of molecules at the solid-liquid interface. The sensor chips containing micro-and nanoscale electronic and fluidics components are fabricated on silicon wafer in the cleanroom facilities available at the Ångstöm Lab.

Optics and optoelectronics

Our optical platform offers high-resolution optical analysis of biomolecules at single particle level. The technology is used for multiparametric analysis of biological vesicles for diagnostics as well as for investigations of fundamental biological questions. The group also has strong interest in optical characterization of nanoscale materials and devices.

Nanofabrication and characterization

A wide variety of nano- and microscale material fabrication and characterization facilities are available.

Theory and simulations

Theoretical modelling are performed to understand the electrostatic and hydrodynamic interaction of biological particles at the solid-liquid interface, allowing us to design better sensor.

Microchip technology for rapid diagnosis and treatment monitoring of lung cancer and malignant melanoma patients using exosome based liquid biopsy

Despite significant advancements in targeted or immune therapies, the survival rate of lung cancer continues to be low (5-yearsurvival less than 10 %). This is largely a consequence of intrinsic or acquired resistance to a given treatment calling for different treatment approaches. Thus, monitoring treatment responses by non-invasive methods can significantly improve the outcome by providing the necessary feedback to the clinical decision point. During the past decade, tumour-derived extracellular vesicles (EVs) have emerged as a potent source of such biomarkers since EV-cargo of RNA and proteins reflects their tumour cell of origin. Within this project, a novel microchip-based technology will be vaidated for liquid biopsy-based treatment monitoring of non-small-cell lung cancer (NSCLC) upon treatment with EGFR-TKI or ICI pembroluzimab.

Project period: 2022-2023

Functional microfluidics and electrokinetic modulation in microchip sensors for single molecule analysis

Addressing highly sensitive biomolecule detection, the aim of the proposal is to perform theoretical and experimental investigations on the electrokinetic response of biomolecular interaction events and exploit it for detection and analysis with a microchip based sensor.

Funding: Vetenskapsrådet (Starting grant)

Project period: 2017-2020

Detection and analysis of tumor and blood-borne markers using new nanotechnology for early diagnosis and monitoring of cancer

Despite major progress in tumor detection and in targeted therapy approaches, cancer continues to be a major cause of death. This is largely due to the metastatic spread, often occurring already at the time of the initial diagnosis, resulting in a poor prognosis for the patient as illustrated in lung- and pancreatic cancer. Also for other cancer forms, early detection and understanding of oncogenic drivers of the tumor are both keys for improvement of the therapeutic outcome of the disease. Reliable and sensitive methods to analyse cancer markers in an easily accessible patient sample, e.g. a blood sample, are highly needed.

The project aim is to develop a micro-chip based technique for multiple sensing of a palette of biomarkers to enable analyses of minute tumor biopsies and material isolated from blood e.g. tumor associated extracellular vesicles (exosomes). The technique will enable a direct, sensitive, cheap and fast analysis providing diagnosis and monitoring treatment responses in different tumors.

Funding: Erling Perssons Family Foundation

Project period: 2017-2021

Collaborators: KTH, Karolinska Institutet, SciLifeLab, RISE.

Simultaneous detection of protein, RNA and DNA in single immune cells

The human immune system is a complex system made up of many specialized cell populations that compete for growth factors, stimulate each other to respond, but also suppress each other to prevent immune pathology. The immune system is a decentralized system and all system-level responses are determined by the combined actions of these different cell populations and can only be understood from analyses involving all these different cell populations simultaneously.

This project aims to develop high throughput technologies to analyze all the constituents of the central dogma of molecular biology in single immune cells.

Funding: Vetenskapsrådet

Project period: 2019-2023

Collaborators: KTH, Karolinska Institutet, SciLifeLab.


Forskningsledare: Apurba Dev
Gruppmedlemmar: Siddharth Sourabh Sahu, Yupeng Yang, Moein Talebian Gevari