Our project
The project intends to develop a novel, innovative biosensing platform whose advantages and benefits are in terms of sensitivity, versatility and being ultrafast by an optical approach. Our platform will be based on the assembly and integration of sensing elements (transducer and bioreceptor) by DNA origami. The DNA origami will serve as a ânano-breadboardâ in order to precisely control the position of these elements and thus the sensor architecture at the nanometer scale.
About the project
Months duration
international partners
countries involved
Mio. ⎠overall budget
Our Objectives
The research concept results in the following, overarching objectives of the project:
Project Summary
The project âDeDNAedâ intends to develop a novel, innovative biosensing platform whose advantages and benefits are in terms of sensitivity, versatility and being ultrafast by an optical approach. Our platform will be based on the assembly and integration of sensing elements (transducer and bioreceptor) by DNA origami. The DNA origami will serve as a ânano-breadboardâ in order to precisely control the position of these elements and thus the sensor architecture at the nanometer scale.
Figure 1: Schematic formation of fluorescent DNA-hosted Au-nanoclusters and the hairpin DNAs,
single-stranded DNAs and fully matched DNAs.
Metallic atomic clusters (ACs) are integrated into a biological marker molecule (DNA or antibody) and thus represent the biological sensor element (Fig. 1). This is specifically integrated into a nanoarray, made of additional metallic nanoparticles, precisely controlled by a DNA origami template and will lead to a significant increase in signal. The DNA origami serves as an individually, inter- and intramolecularly programmable ânano-breadboardâ. A DNA origami consists of a single strand of DNA, folded by a thermal treatment and certain staple strands into any shapes (2D as well as 3D, dimensions of approx. 100 nanometers). So-called âsticky endsâ on the surface of the DNA origami offer the possibility of an individual implementation of the sensing elements and nanoparticles, by means of correspondingly complementary oligonucleotides with a resolution of approx. 2 nm. When the analyte is connected to the sensor element, a change in the Raman signal can thus be detected without major delay using surface-enhanced Raman spectroscopy (SERS), as depicted in Fig.2.
Figure 2: Schematic sketch of the change in the SERS signal upon binding of the analyte to the biological marker molecule (e.g. DNA aptamer).
This sensor method is not bound to a specific biomarker molecule for the sensor element, but can be transferred to different marker molecules. This results in a high degree of flexibility in the area of application, from medical technology to food monitoring. In addition, a transfer of the DNA origami-based sensor platform to flexible, textile substrates is carried out using lipid bi-layers and the Langmuir-Blodgett method for later use as a wipe test or medical wearable (Fig. 3).
Figure 3: Schematic sketch of the large scale arrangement of DNA origami based sensor array on supporting lipid-bilayers (SLB) anchored by cholesterol units and the transfer mechanism to flexible substrate by LB.
The center of microtechnologies (ZfM) is a research center at the Technische UniversitÃĪt Chemnitz, active in the fields of advanced technologies for microelectronics, microsystems and silicon micromachining as well as nanotechnologies. We have more than 30 years of experience in the field of wafer processing for system integration using top-down technologies in combination with around 1000 mÂē of clean room environment.
In addition to the honorable task of project coordination of DeDNAed, the ZfM will be responsible for the integration of the DNA origami hybrids on different surfaces to enable characterization and application of the biosensor platform. We are developing a suitable thin-film system on silicon wafers with optimized surface properties using CVD, electron beam lithography and plasma etching in order to create binding points that are adapted to the small sizes of DNA origami in the range of 100 nm and less. The process of self-organized selective surface immobilization of the DNA origami hybrid structures is also implemented by the ZfM, based on the knowledge that has been gained in the field of the bottom-up technologies and especially their surface integration in recent years through various projects and collaborations (cfaed, MERGE, Bio4Comp, âĶ) for CNTs, QDs and DNA origami. This includes, next to silicon-based substrates, also flexible ones such as polymers or paper on which DNA origami hybrid structures will be deposited using the Langmuir-Blodgett process.
The Center for Cooperative Research in Biomaterials- CIC biomaGUNE, is a non-profit research organization created to promote scientific research and technological innovation in the Basque Country (Spain). CIC biomaGUNE develops high-level research at the interface between chemistry, physics, and biology, with particular emphasis on the properties and applications of nanostructures at the biomolecular level.
In particular, the Biomolecular Nanotechnology group led by Prof. Aitziber L. Cortajarena, focuses on the engineering of biomolecules towards the generation of functional nanostructures and bioinspired materials for applications in nanobiotechnology and nanomedicine. Within the group principal investigator Dr. Valery Pavlov leads the Biosensing research line involved in DeDANed. He has extensive experience in selection and synthesis of DNA aptamers for several target proteins and its application for development of highly sensitive and specific analytical assays.
Our contribution to the DeDNAed project will be the design, synthesis, and characterization of different sensing biorecognition elements (antibodies and DNA aptamers) in pure state and modified with metallic and semiconductor atomic clusters. We will also design, synthesize, and provide metallic nanoparticles of different size and shape as amplifiers of optical read out signals.
The Kurt-Schwabe-Institut fÞr Mess- und Sensortechnik Meinsberg e.V. (KSI Meinsberg) is responsible for the design, the synthesis and the structural characterization of DNA origami. Additionally, the synthesis of DNA origami hybrids, and thus, the arrangement of recognition elements and nanoparticles in envisioned position for SERS measurements, is a main task of KSI in the project. The structural characterization of the sensor assembly as a whole will be performed at KSI, too.
The Institute of Molecules and Materials of Le Mans (IMMM) will be in charge of the characterization of the optical and plasmonic properties of the nanostructures included in the bioanalytical platform. The Institute will also determine the SERS efficiency and the sensing performances of the platform. Finally, it will be involved in the validation of the sensor for food and biomedical applications.
The role of the group of Molecular Bioanalytics and Bioelectronics at the Institute of Biochemistry and Biology at University Potsdam is to benchmark the methodological progress of the project against established methods. Hence, sensor results will be validated in our labs by using standard methods. Here, we focus on microtiter plate-based analyses as well as kinetic measurements for system validation.
TECNALIA Research & Innovation is a private, independent, non-profit applied research centre of international excellence. TECNALIA is the leading private and independent research and technology organization in Spain and one of the largest in Europe, whose mission is to transform technology into GDP to improve peopleâs quality of life, by creating business opportunities for companies, being member of BRTA (Basque Research and Technology Alliance).
The main tasks of the Biomaterials Area of TECNALIA in the present project will be the incorporation of the ACs inside of antibodies, the screening of oriented immobilization of antibodies on surfaces, functionalization of flexible polymer for DNA origami immobilization and validation of the system for IL-6 detection. In parallel, Tecnalia will participate in the definition of the exploitation strategy of results.
BioNanoNet Forschungsgesellschaft mbH is a non-profit research organization, specialized in international R&D&I collaboration that supports and guides its members and customers towards a sustainable development of connected technologies. The core of BNN activities and expertise are based on: (a) Building alliances and initiatives, (b) Technical support based on Safe-by-Design and sustainability aspects, supporting the development of materials, processes and products (e.g. safety and sustainability aspects along the value chain, nano-related safety-assessment, Safety-by-Design and Sustainability-by-Design implementation), (c) Innovation support and management, and (d) Complementary business support (e.g. high-quality project management in multidisciplinary projects on international level, dissemination and communication support, proven experience in organizing workshops and scientific trainings).
Within DeDNAed, BNN will be engaged in Dissemination and Exploitation tasks, such as constructing and maintaining the projectâs website as well as preparing and implementing the dissemination strategy. Moreover, BNN will be involved in the Coordination and Management of the project, for instance with the development of the project quality plan. Finally, BNN will develop a Safe-by-Design concept, considering nano- and biosafety aspects.
Publications & Posters
Publications
- Study of the DNA structure and orientation using SERS: Influence of the hybridisation and mismatches (2025)
- Conventional Raman, SERS and TERS Studies of DNA Compounds (2023)
- Label-free SERS for rapid identification of interleukin 6 based on intrinsic SERS fingerprint of antibodyâgold nanoparticles conjugate (2023)
- Detection of Reverse Transcriptase LAMP-Amplified Nucleic Acid from Oropharyngeal Viral Swab Samples Using Biotinylated DNA Probes through a Lateral Flow Assay (2023)
- Recent Progresses in Optical Biosensors for Interleukin 6 Detection (2023)
- An Electroactive and Self-Assembling Bio-Ink, based on Protein-Stabilized Nanoclusters and Graphene, for the Manufacture of Fully Inkjet-Printed Paper-Based Analytical Devices (2023)
- Roadmap Safe and Sustainable Advanced and Innovative Materials 2024-2030 (2024)
Posters
- Cluster decorated recognition elements on DNA origami for enhanced raman spectroscopic detection methods (2022 â JanÃen)
- Cluster decorated recognition elements on DNA origami for surface enhanced Raman spectroscopic detection methods (2022)
- Functional ssDNA for the development of a DNA origami biosensor (2022)
- Sensing performances of commercial SERS substrates (2022)
- Cluster decorated functional DNA origami based biosensor: Towards Safe Nano-innovations (2022)
- Correlation between DNA bases and the intensity of the Raman bands with SERS (2023)
- Observation of DNA Strand Interaction with SERS (2023)
- Precise functionalization of NPs towards chiral NP dimers (2023)
- Locally Selective Immobilization of DNA origami for Raman Spectroscopy based biosensors (2023)
- Safe-by-Design of DNA origami-based biosensors: Moving towards safer nano-innovations (2024)
- Determination of Mg-Ion concentration in DNA Origami in buffer solutions (2024)
Conference proceedings
Public Deliverables
- Deliverable 1.1 Report on the Kick-off Meeting
- Deliverable 1.2 Project Quality Plan
- Deliverable 8.1 Public project website online
- Deliverable 8.2 Data Management Plan
- Deliverable 8.3 First version of the exploitation and dissemination plan of results
- Deliverable 8.4 Update of Data Management Plan
- Deliverable 8.5 Second version of the exploitation and dissemination plan of results
Get in Touch
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