Dynamics of ultrafine silver implanted DNA nanowire formation
Source abstract
Abstract
Recent research on silver nanowires prepared on DNA templates has focused on two fundamental applications: nano-scale circuits and sensors. Despite their broad potential, the formation kinetics of silver implanted DNA nanowires remains unclear. Here, we present an experimental demonstration of the formation of silver nanowires with a diameter of 2.2 ± 0.4 nm at the single-molecule level through chemical reduction. We conducted equilibrium and perturbation kinetic experiments to measure force during the formation of Ag+-DNA complexes and Ag-DNA complexes, using optical tweezers combined with microfluidics. The addition of AgNO3 resulted in an increase in force of 5.5-7.5 pN within 2 minutes, indicating that Ag+ compacts the DNA structure. In contrast, the addition of hydroquinone caused the force to decrease by 4-5 pN. Morphological characterization confirmed the presence of a dense structure formed by silver atoms bridging the DNA strands and revealed conformational differences before and after metallization. We compare our experimental data with Brownian dynamics simulations using a coarse-grained double-stranded DNA (dsDNA) model that provides insights into the dependency of the force on the persistence length.
Source: europepmc · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced biosensing and bioanalysis techniques · Gold and Silver Nanoparticles Synthesis and Applications · Nanocluster Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China
Department of Industrial Engineering, University of Rome Tor Vergata, Italy
Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
Key Laboratory of Quantum Precision Measurement, College of Physics, Zhejiang University of Technology, Hangzhou, China
Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
CNR-Istituto Officina dei Materiali (CNR-IOM), SS 14 km 163.5, Area Science Park Basovizza, 34149, Trieste, Italy
Department of Physics, University of Fribourg, Fribourg, CH 1700, Switzerland
Dipartimento di Scienze e metodi dell'ingegneria, Università degli Studi di Modena e Reggio Emilia, 42122 Reggio Emilia, Italy
Funding
HORIZON EUROPE European Innovation Council · National Key Laboratory Foundation of China · National Natural Science Foundation of China
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