Among all known materials, we found that a forest of vertically aligned single-walled carbon nanotubes behaves most similarly to black body, theoretical material absorbs incident light. A requirement for an object behave as body is perfectly absorb light wavelengths. This important feature has not been observed real materials because intrinsically have specific absorption bands their structure and composition. We can almost across very wide spectral range (0.2-200 mum). attribute this...

We propose a statistical and macroscopic analysis to estimate the catalyst activity of water-assisted growth (super-growth) single-walled nanotubes (SWNT) characterize SWNT forests. The was estimated be 84% (+/-6%), highest ever reported. forest found very sparse material where SWNTs represent only 3.6% total volume. This structural sparseness is believed play critical role in achieving highly efficient growth.

Self-assembly of proteins on surfaces is utilized in many fields to integrate intricate biological structures and diverse functions with engineered materials. Controlling at bio-solid interfaces relies establishing key correlations between their primary sequences resulting spatial organizations substrates. Protein self-assembly, however, remains an engineering challenge. As a novel approach, we demonstrate here that short dodecapeptides selected by phage display are capable self-assembly...

Direct molecular detection of biomarkers is a promising approach for diagnosis and monitoring numerous diseases, as well cornerstone modern medicine drug discovery. Currently, clinical applications are limited by the sensitivity, complexity low selectivity available indirect methods. Electronic 1D 2D nano‐materials such carbon nanotubes graphene, respectively, offer unique advantages sensing substrates simple, fast ultrasensitive biomolecular binding. Versatile methods, however, have yet to...

Self-assembly of biological molecules on solid materials is central to the "bottom-up" approach directly integrate biology with electronics. Inspired by biology, exquisite biomolecular nanoarchitectures have been formed surfaces. We demonstrate that a combinatorially-selected dodecapeptide and its variants self-assemble into peptide nanowires two-dimensional nanosheets, single-layer graphene MoS2. The abrupt boundaries create electronic junctions via spatial doping manifest themselves as...

The dispersion of small-diameter single-walled carbon nanotubes (SWNTs) produced by the CoMoCAT method in tetrahydrofuran (THF) with use amine was studied. absorption, photoluminescence, and Raman spectroscopies showed that centrifugation process leads to an effective separation metallic SWNTs from semiconducting SWNTs. Since this is simple convenient, it highly applicable industrial utilization for widespread applications

Abstract Cell-penetrating peptides (CPPs) including arginine-rich are attracting a lot of attention due to their potential as novel intracellular drug delivery tool without substantial toxicity. On the other hand, disease-associated CPPs, such poly-PR and poly-GR translated from C9orf72 gene, also efficiently enter neuronal cells then kill them. Although both non-harmful CPPs harmful poly-PR/GR penetrate plasma membrane using same arginine residues, little is known about factors which...

Replicating the sense of smell presents an ongoing challenge in development biomimetic devices. Olfactory receptors exhibit remarkable discriminatory abilities, including enantioselective detection individual odorant molecules. Graphene has emerged as a promising material for electronic devices due to its unique electrical properties and exceptional sensitivity. However, efficient nonpolar odor molecules using transistor-based graphene sensors gas phase environmental conditions remains...

Self-assembled peptides have revealed uniform ordering on two-dimensional (2D) materials such as mica, graphene, and MoS2 so far. These are expected to be utilized a molecular scaffold for biosensing based 2D materials. However, the stability of peptide structures under liquid has not been evaluated, some previously reported may instability water. In this work, by mimicking an amino-acid sequence silk protein, we successfully developed sequences that can maintain ordered nanostructures even...

Arg (R)-rich dipeptide repeat proteins (DPRs; poly(PR): Pro-Arg and poly(GR): Gly-Arg), encoded by a hexanucleotide expansion in the C9ORF72 gene, induce neurodegeneration amyotrophic lateral sclerosis (ALS). Although R-rich DPRs undergo liquid–liquid phase separation (LLPS), which affects multiple biological processes, mechanisms underlying LLPS of remain elusive. Here, using silico, vitro, cellulo methods, we determined that distribution charged residues regulates complex coacervation with...

Gas sensing based on graphene field-effect transistors (GFETs) has gained broad interest due to their high sensitivity. Further progress in gas with GFETs requires detection of various odor molecules for applications the environmental monitoring, healthcare, food, and cosmetic industries. To develop ubiquitous odor-sensing system, establishing an artificial sense smell electronic devices by mimicking olfactory receptors will be key. Although application is straightforward sensing, synthetic...

Arginine-rich dipeptide repeat proteins (R-DPRs), poly(PR) and poly(GR), translated from the hexanucleotide expansion in amyotrophic lateral sclerosis (ALS)-causative C9ORF72 gene, contribute significantly to pathogenesis of ALS. Although both R-DPRs share many similarities, there are critical differences their subcellular localization, phase separation, toxicity mechanisms. We analyzed protein-protein interactions, separation R-DPR variants found that sufficient segregation arginine charges...

Making contact of transition metal dichalcogenides (TMDCs) with a surface is essential for fabricating and designing electronic devices catalytic systems. It also generates strain in the TMDCs that plays significant role both phonon structures. Therefore, detailed understanding mechanism generation important to fully comprehend modulation effect properties. Here, MoS 2 MoSe monolayers are grown on Au by chemical vapor deposition it demonstrated crystalline Au(111) gives rise only...

Biosensors with two-dimensional materials have gained wide interest due to their high sensitivity. Among them, single-layer MoS2 has become a new class of biosensing platform owing its semiconducting property. Immobilization bioprobes directly onto the surface chemical bonding or random physisorption been widely studied. However, these approaches potentially cause reduction conductivity and sensitivity biosensor. In this work, we designed peptides that spontaneously align into...

Liquid–Liquid Phase Separation (LLPS) plays a crucial role in cell biology and is closely associated with neurodegenerative diseases like Amyotrophic Lateral Sclerosis (ALS) Frontotemporal Dementia (FTD). Recent studies connect mutations the C9ORF72 gene to production of arginine-rich dipeptide repeat proteins (R-DPRs), such as poly(PR) poly(GR). These R-DPRs disrupt LLPS membrane-less organelles (MLOs) contribute disease pathology. While traditional analysis techniques nuclear magnetic...

The formation of molecular hybrid systems with cofactors and peptides on graphite electrodes has recently been demonstrated. design peptide sequences is crucial for forming robust catalytic electrodes. However, the relationship between sequences, structure, performance not fully explored. In this study, we employed simple dipeptide repeats, which effectively immobilize hemin, to construct a stable system investigated basis their self-assembly activity by varying sequence. Among containing...

A laser with an active volume consisting of only a single quantum wire in the 1-dimensional (1-D) ground state is demonstrated. The formed quantum-mechanically at T-intersection 14 nm Al_{0.07}Ga_{0.93}As well and 6 GaAs well, embedded 1-D single-mode optical waveguide. We observe lasing from by pumping. operates 5 to 60 K, has low threshold pumping power mW K.

Optical gain and the Mott transition in GaAs quantum wires were studied via simultaneous measurements of absorption photoluminescence (PL). We observed well-separated PL peaks assigned to excitons (X) biexcitons (XX) even at densities where optical existed. A sharp first appeared when XX peak overtook X peak, indicating origin biexciton-exciton population inversion. The eventually changed a broad plasma, due plasma was as completed.

We present a dual porosity CNT material with seamless connection between highly porous aligned nanotubes and lowly closely packed by using capillary action of liquids. Various approaches were developed to fabricate diverse structures toothpicks, liquid thin films, bubbles, vapors, superink jet printing. The showed low wear was useful as sliding electrical contact.

The systematic control over surface chemistry is a long-standing challenge in biomedical and nanotechnological applications for graphitic materials. As novel approach, we utilize graphite-binding dodecapeptides that self-assemble into dense domains to form monolayer-thick long-range-ordered films on graphite. Specifically, the peptides are rationally designed through their amino acid sequences predictably display hydrophilic hydrophobic characteristics while maintaining self-assembly...

We report spatially resolved vibrational analysis of mechanically exfoliated single-crystalline α-MoO3 nanolayers. Raman scattering from was enhanced predominantly at the outside edges The attributed primarily to resonant effect caused by a high density oxygen vacancies localized edges. vacancy sites corresponded non-stoichiometric phase MoO3, which would provide reactive with catalytic activity.

An olfactory receptor mimetic peptide-modified graphene field-effect transistor (gFET) is a promising solution to overcome the principal challenge of low specificity graphene-based sensors for volatile organic compound (VOC) sensing. Herein, peptides mimicking fruit fly receptor, OR19a, were designed by high-throughput analysis method that combines peptide array and gas chromatography sensitive selective gFET detection signature citrus VOC, limonene. The probe was bifunctionalized via...