ConspectusLuminescent solar concentrators (LSCs) are light harvesting devices that ideally suited to collection in the urban environment where direct sunlight is often not available. LSCs consist of highly luminescent compounds embedded or coated on a transparent substrate absorb diffuse radiation over large area. The resulting luminescence trapped waveguide by total internal reflection thin edges concentrated can be used improve performance photovoltaic devices. concept has been around for...

The photophysical properties of fluorescent dyes are key determinants in the performance luminescent solar concentrators (LSCs). First-generation – coumarin, perylenes and rhodamines - used LSCs suffer from both concentration quenching solid-state small Stokes shifts which limit current LSC efficiencies to below theoretical limits. Here we show that fluorophores exhibit aggregation-induced emission (AIE) promising materials for applications. Experiments Monte Carlo simulations optical...

Efficient light harvesting in a luminescent solar concentrator has been achieved by using excitation energy transfer from an aggregation-induced emitter to high fluorescence quantum yield fluorophore.

Maintaining high incident light absorption while minimizing luminescence reabsorption is a key challenge for organic luminescent solar concentrators (LSCs). Energy migration and trapping using light-harvesting donors low-energy highly emitting acceptor one strategy to reduce the issue. However, concentration quenching potential formation of aggregates limiting factor in realizing efficient devices. We describe synthesis novel molecularly insulated perylene diimide that can resist at...

Abstract Control over the copy number and nanoscale positioning of quantum dots (QDs) is critical to their application functional nanomaterials design. However, multiple non-specific binding sites intrinsic surface QDs have prevented fabrication into multi-QD assemblies with programmed spatial positions. To overcome this challenge, we developed a general synthetic framework selectively attach spatially addressable on 3D wireframe DNA origami scaffolds using interfacial control QD surface....

Achieving nanoscale spatial and electronic control over the formation of dye aggregates is a major synthetic challenge due to their typically inhomogeneous self-assembly, which limits higher-order organization. To address these challenges, DNA-templated pseudoisocyanine (PIC) J-aggregates were recently introduced. However, dependence photophysics superradiant exciton on underlying DNA template length impact static disorder energy transfer through PIC remain unknown. We examine delocalization...

Two dyes showing aggregation induced emission behaviour were examined for use as a light harvesting Förster resonance energy transfer pair in luminescent solar concentrators.

The rapid decline in DNA sequencing costs has fueled the demand for nucleic acid collection to unravel genomic information, develop treatments genetic diseases, and track emerging biological threats. Current approaches maintaining these collections hinge on continuous electricity low-temperature intricate cold-chain logistics. Inspired by millennia-long preservation of fossilized specimens calcified minerals or glassy amber, we present Thermoset-REinforced Xeropreservation (T-REX): a method...

A series of solution processable conjugated polymers containing the benzotriazole unit have been synthesized and studied. The can be considered a moderately electron deficient building block that readily incorporate convenient alkyl substituent for processability. By varying accepting strength co-monomer partners, with different photophysical properties were obtained. Some exhibit relatively high fluorescence quantum yields while others able to quench donor in blends consistent their ability...

DNA scaffolds enable the activation and suppression of photochemistry between strongly-coupled synthetic chromophores.

The synthesis of key 4-alkyl-substituted 5-(trimethylsilyl)thiophene-2-boronic acid pinacol esters 3 allowed a simplified alkylthiophene catenation process to access bis-, ter-, quater-, and quinquethiophene π-bridges for the acceptor–π-bridge-donor– π-bridge-acceptor (A–π-D–π-A) electron donor molecules. Based on known benzodithiophene-terthiophene-rhodanine ( BTR ) material, BXR series materials, BMR (X = M, monothiophene), BBR B, bithiophene), T, terthiophene), BQR Q, quaterthiophene),...

The luminescence properties of pyrene ethenes, both as monomer and aggregate species, are found to depend on the regioisomer structure. Systematic shifts in absorption, emission, excitation spectra gem ‐pyrene solution rigid polymer hosts, consistent with weakly interacting H‐aggregate formation. This aggregation leads excimer‐like emission Stokes greater than 1 eV. Planar concentrators fabricated from diphenylethenes show comparable performance previously reported inorganic phosphors. UV...

Photoexcited fluorescent markers are extensively used in spectroscopy, imaging, and analysis of biological systems. The performance depends on high levels emission, which limited by competing nonradiative decay pathways. Small-molecule dyes have been increasingly as due to their stable emission. Despite prevalence, the pathways these not determined. Here, we investigate for a widely indocarbocyanine dye, Cy3, using transient grating spectroscopy. We identify pathway via previously unknown...

Rapid advances in nucleic acid sequencing and synthesis technologies have spurred a major need to collect, store, sequence the DNA RNA from viral, bacterial, mammalian sources organisms. However, current approaches storing acids rely on low-temperature environment require robotics for access, posing challenges scalable low-cost storage. Here, we present an alternative method acids, termed Preservation Access of Nucleic aciDs using barcOded micRocApsules (PANDORA). spanning kilobases...

Aggregated cyanines form ordered supramolecular structures with the potential to transport energy efficiently over long distances, a hallmark of photosynthetic light-harvesting complexes. In concentrated aqueous solution, pseudoisocyanine (PIC) spontaneously forms fibers chiral J-band red-shifted 1600 cm-1 from monomeric 0-0 transition. A cryogenic transmission electron microscopy analysis these show an average fiber width 2.89 nm, although molecular-level structure aggregate is currently...

Abstract This account describes the work of our group in area organic photovoltaics past six years. The emphasis is on experiences development materials, their characterization, scale‐up and application devices. We share insight into relationship between synthetic methods, molecular properties, bulk material properties device performance. graphic

ABSTRACT DNA is an ultra-high-density storage medium that could meet exponentially growing worldwide demand for archival data if synthesis costs declined sufficiently and random access of files within exabyte-to-yottabyte-scale pools were feasible. To overcome the second barrier, here we encapsulate data-encoding file sequences impervious silica capsules are surface-labeled with single-stranded barcodes. Barcodes chosen to represent metadata, enabling efficient direct selection sets Boolean...

An electronic nose based on chemiresistors employing conducting polymers as the sensing material was developed for discrimination of medicinal plants. The were synthesized through potentiostatic electropolymerization and deposited between two gold wires set 200 μm apart a Teflon substrate. doped with several counter ions. resistance changed upon exposure to headspace finely-chopped leaves following plants: Vitex negundo (Lagundi), Mentha arvensis (Yerba Buena), piperita (Peppermint),...

Molecular pathology tests rely on the availability of formalin-fixed paraffin-embedded (FFPE) tissues as a source nucleic acids for diagnostic and research purposes. FFPE preservation is one most widely used methods to preserve tissues, but this method has several limitations. For example, it well established that formalin fixation generates cross-links fragmentation acids, introducing base modification artifacts interfere with analysis genomic data.

ABSTRACT The surge in nucleic acid analytics requires scalable storage and retrieval systems akin to electronic databases used organize digital data. Such a system could transform disease diagnosis, ecological preservation, molecular surveillance of biothreats. Current use individual containers for samples, requiring single-sample that falls short compared with allow complex combinatorial data on aggregated Here, we leverage protective microcapsules DNA labeling enables arbitrary pooled...