A5038895577- Gold and Silver Nanoparticles Synthesis and Applications
- Plasmonic and Surface Plasmon Research
- Nanowire Synthesis and Applications
- Advanced Fluorescence Microscopy Techniques
- Anodic Oxide Films and Nanostructures
- Silicon Nanostructures and Photoluminescence
- Nanofabrication and Lithography Techniques
- Copper-based nanomaterials and applications
- Orbital Angular Momentum in Optics
- Sensor Technology and Measurement Systems
- Electrochemical Analysis and Applications
- Optical Wireless Communication Technologies
- Photonic and Optical Devices
- Nonlinear Optical Materials Studies
- Nanoporous metals and alloys
- Spaceflight effects on biology
- Semiconductor materials and devices
- Metamaterials and Metasurfaces Applications
- Microfluidic and Bio-sensing Technologies
- Conducting polymers and applications
- Advanced biosensing and bioanalysis techniques
- Near-Field Optical Microscopy
- Magnetic and Electromagnetic Effects
- Spectroscopy Techniques in Biomedical and Chemical Research
- Photoacoustic and Ultrasonic Imaging
University of Twente
2020-2025
Chan Heart Rhythm Institute
2023
The electrochemical synthesis of
Surface-enhanced Raman spectroscopy (SERS) substrates are of utmost interest in the analyte detection biological and chemical diagnostics. This is primarily due to ability SERS sensitively measure analytes present localized hot spots nanostructures. In this work, we formation 67 ± 6 nm diameter gold nanoparticles supported by vertically aligned shell-insulated silicon nanocones for ultralow variance SERS. The obtained through discrete rotation glancing angle deposition an e-beam evaporating...
Abstract Locally controlling the position of electrodes in 3D can open new avenues to collect electrochemical signals complex sensing environments. Implementing such via an electrical network requires advanced fabrication approaches. This work uses corner lithography and Pt ALD produce electrodes. The approach allows (sub)micrometer size octahedra spatially supported over fractal‐like structures. As a proof concept, ferrocyanide biofouling environments, e.g., bovine serum albumin (BSA)...
Access to a wafer-scale nanofabrication strategy for crafting three-dimensional plasmonic structures.
Chemically synthesized metal nanoparticles (MNPs) have been widely used as surface-enhanced Raman spectroscopy (SERS) substrates for monitoring catalytic reactions. In some applications, however, the SERS MNPs, besides being plasmonically active, can also be catalytically active and result in signals from undesired side products. The MNPs are typically insulated with a thin (∼3 nm), principle pin-hole-free shell to prevent this. This approach, which is known shell-isolated...
Abstract Convex cylindrical silicon nanostructures, also referred to as nanocones, find their value in many applications ranging from photovoltaics nanofluidics, nanophotonics, and nanoelectronic applications. To fabricate both bottom-up top-down methods can be used. The method presented this work relies on pre-shaping of nanowires by ion beam etching followed self-limited thermal oxidation. combination oxidation obtains high-density, high aspect ratio, periodic, vertically aligned sharp...
We report on the fabrication and modification of a top-down nanofabrication platform for enormous parallel silicon nanowire-based devices. explain nanowire formation in detail, using an additive hybrid lithography step, optimising reactive ion etching recipe obtaining smooth vertical nanowires under mask, embedding dielectric membrane. The are used as sacrificial template, removal forms arrays well-defined nano-pores with high surface density. This is expected to find applications many...
Electrochemical Sensing In article number 2300878, Dirk Jonker, Niels Tas, Arturo Susarrey-Arce, and co-workers demonstrate spatially patterned Pt octahedra functionality during electrochemical sensing under biofouling conditions. the near future, this fabrication approach can facilitate independent using each octahedron as an electrode in more complex cellular environments.
We proposed to explore room-temperature quantum devices operating at the single-photon level, with functionalities that can be tailored changing different parameters of a plasmonic metamaterial composed hollow truncated nanocones greatly enhance photonic density states. study numerically and experimentally properties this material supporting very high field enhancement dipolar quadrupolar modes as functions angle polarization illumination. measure dependence their resonance wavelengths on...
The pressure stability of microfluidic glass chips was tested experimentally, with a special focus on the inserts for glued capillary connections.Destructive high-pressure experiments demineralized water conducted at room temperature showed difference in mean fracture between two types BF33 and D263T, values 192 ± 25 159 bar, respectively.For BF33, hydrofluoric acid (HF) etching powder blasted (abrasive jet machined) chip insert increased 43 9 whilst D263T decrease -22 8 bar...
A novel fabrication technique is developed to deliver self-aligned gate structures on vertically aligned periodic silicon nanocones with aperture radii of 65±3 nm and a surface density 1.6 billion cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-2</sup> across the 100 mm diameter substrate scale. The were obtained by combination ion beam etching thermal oxidation whereas planarization selective wet chemical etching.
Gold nanoparticles (AuNPs) were the basis for earliest research in field of surface enhanced Raman scattering (SERS). Coupling their plasmon resonances creates hot-spots high electromagnetic intensities found to be very useful sensing applications. However, chemically synthesized AuNPs suspension are usually polydisperse and when arranged on a SERS substrate, lack periodic spatial organization. This leads large variations enhancement factor (EF) which is detrimental capabilities substrate....
We use single-molecule fluorescence lifetime imaging microscopy (smFLIM) to map at the nanometer scale resolution decay rate enhancement of single emitters coupled new nanomaterial platforms that significantly modified electromagnetic environment and single-photon emission rate.
Combined hybrid lithography and sputter redeposition enable reproducible wafer-scale fabrication of gold hollow nanopillars with relatively large field enhancement verified both numerically experimentally. The application such structures is demonstrated surface-enhanced Raman scattering (SERS).
We study the modification of fluorescence emission and decay rate single fluorescent molecules in near field a periodic plasmonic nanostructure formed by square lattice Au hollow conical pillars with periodicity 250 nm. perform nanometer-resolved imaging LDOS simultaneously mapping position photoactivatable single-molecules novel super-resolved microscopy approach which enables multiplexed lifetime at single-molecule level (smFLIM) view ~10 µm2. observe such optically rich material different...
The direct measurement of a single emitter decay rate and the simultaneous knowledge their position is powerful tool for study light-matter interaction at nanometer scale. In particular, directly related to local density states (LDOS) which measures number modes electromagnetic environment available an emitter.