A5006444074- Molecular Junctions and Nanostructures
- Gold and Silver Nanoparticles Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Nanocluster Synthesis and Applications
- Advanced biosensing and bioanalysis techniques
- Orbital Angular Momentum in Optics
- nanoparticles nucleation surface interactions
- Radical Photochemical Reactions
- Nanowire Synthesis and Applications
- Photochromic and Fluorescence Chemistry
- Quantum-Dot Cellular Automata
- Molecular Sensors and Ion Detection
- Force Microscopy Techniques and Applications
- Copper-based nanomaterials and applications
- Advanced Biosensing Techniques and Applications
- Micro and Nano Robotics
- Analytical Chemistry and Sensors
- Advanced Nanomaterials in Catalysis
- Click Chemistry and Applications
- Microfluidic and Bio-sensing Technologies
- Material Properties and Applications
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Ferrocene Chemistry and Applications
- Digital Holography and Microscopy
- Plasmonic and Surface Plasmon Research
Chalmers University of Technology
2013-2020
Göteborgs Stads
2015-2020
University of California, Berkeley
2010
Controlling the position and movement of small objects with light is an appealing way to manipulate delicate samples, such as living cells or nanoparticles. It well-known that optical gradient radiation pressure forces caused by a focused laser beam enables trapping manipulation strength dependent on particle's properties. Furthermore, utilizing transfer photon spin angular momentum, it also possible set into rotational motion simply targeting them circularly polarized light. Here we show...
Lanthanide-based luminescent probes TPR1 and TPR2 were developed for the detection of hydrogen peroxide (H(2)O(2)) in living systems. The chemoselective reaction these boronate-protected with H(2)O(2) resulted an enhanced lanthanide sensitization a 6-fold increase intensity. was utilized to measure endogenous production RAW 264.7 macrophages using time-gated spectroscopy.
The self-assembly of individual nanoparticles into dimers-so-called heterodimers-is relevant for a broad range applications, in particular the vibrant field nanoplasmonics and nanooptics. In this paper we report synthesis characterization material- shape-selected nanoparticle heterodimers assembled from particles via electrostatic interaction. versatility synthetic strategy is shown by assembling combinations metal different shapes, sizes, compositions like gold sphere (90 nm) with either...
Interactions between surface plasmons in metal nanoparticles and electronic excitations organic chromophores have resulted many notable findings, including single-molecule Raman scattering, nanoscale lasing, enhanced fluorescence. Recently, plasmon–exciton interactions been shown to reach the strong coupling limit, a nonperturbative regime which coupled system should be treated as unified hybrid. Strong effects could open up exciting possibilities for manipulating nanoparticle via molecular...
Recent years have seen progress in several areas regarding single molecule electronic devices. A number of interesting structure–property relationships been observed, including vibronic effects, spin transitions, and molecular interference known as quantum interference. Together, these observations highlight what the rich opportunities design might bring terms advanced device properties. Pertinent challenges are related to development high yield preparative procedures for fabrication devices...
We present recent developments on the use of self-assembly methods to bridge gap between sub-nanometer and micrometer length scales.
The self-assembly of nanoparticles on substrates is relevant for a variety applications such as plasmonics, sensing devices and nanometer-sized electronics.
This paper describes a strategy for controlled nanoparticle dimerization by using solid support approach. Two types of nanoparticles have been linked 5-([2,2′:6′,2″-terpyridine]-4′-yloxy)pentan-1-amine (terpy-amine) iron complex. The includes two major steps: first, the monofunctionalization individual with terpy-amine ligand molecules on support, followed release monofunctionalized particles and subsequent dimerization. versatility approach was demonstrated dimerizing different...
This article highlights recent advances in the controlled self-assembly of nanoparticles to produce dimeric nanoparticle structures. The relevance this emergent field is discussed terms applications plasmonics and chemical catalysis. concept bond-valence applied will be discussed, emphasizing some general approaches that have been successfully used build these Further, asymmetric functionalization surfaces as a path drive selective aggregation, use biomolecules self-assemble into dimers...
Scheme 1. Final step in the synthesis of o-nitrobenzyl NB compounds.o-Nitrobenzyl alcohol reacts with different tertiary propargylic alcohols presence catalytic amounts CuBr 2 .These products can be photo-cleaved under alkaline conditions to give terminal alkynes.
Copper and copper-cobalt subnanoparticles have been synthesized using 4-carbomethoxypyrrolidone terminated PAMAM-dendrimers as templates. The metal particles were applied in catalytic reduction reactions. While Cu only capable of reducing conjugated double bonds, enhancing the with Co led to a surprising increase activity, also isolated carbon triple bonds.
Single molecule electronics might be a way to add additional function nanoscale devices and continue miniaturization beyond current state of the art. Here, combined top-down bottom-up strategy is employed assemble single molecules onto prefabricated electrodes. Protodevices, which are self-assembled nanogaps composed by two gold nanoparticles linked or few molecules, guided nanosized nickel electrodes with sandwiched palladium layers. It shown that an optimized geometry multilayered metallic...
We present a method for efficient coupling of amine nucleophilic molecules choice to nanostructured gold surface via photoinduced chemistry. The is based on photoactive self-assembled monolayers and can be used functionalize localized plasmon resonance (LSPR) biosensors with biorecognition motifs while reducing nonspecific binding introduction hydrophilic units. linker molecule, 5-bromo-7-nitroindoline, couples such as biotin ethylenediamine when exposed UV-light. specific, noncovalent...
Nanoparticle dimers composed of different metals or metal oxides, as well shapes and sizes, are wide interest for applications ranging from nanoplasmonic sensing to nanooptics biomedical engineering.
Guided deposition of nanoparticles onto different substrates is great importance for a variety applications such as biosensing, targeted cancer therapy, anti-bacterial coatings and single molecular electronics. It therefore important to gain an understanding what parameters are involved in the nanoparticles. In this work we have deposited 60 nm, negatively charged, citrate stabilized gold microstructures consisting six materials, (vanadium (V), silicon dioxide (SiO2), (Au), aluminum (Al),...
In article number 1803471, Johnas Eklöf-Österberg, Kasper Moth-Poulsen, and co-workers make isolation, positioning, electronic measurements on single molecules possible using a combined top-down bottom-up strategy. Proto-devices, which are self-assembled nanogaps composed of two gold nanoparticles linked by or few molecules, guided onto prefabricated nanosized electrodes surface charge interactions. The assembly process enables electrical through particle–molecule–particle devices.
Abstract A series of base stable tertiary propargylic ether o‐nitrobenzyl photo‐cages (III) is synthesized.