We present scanning focused laser beam as a multipurpose tool to engineer the physical and chemical properties of WS microflakes. For monolayers, the laser modification integrates oxygen into the WS microflake, resulting in ∼9 times enhancement in the intensity of the fluorescence emission. This modification does not cause any morphology change, allowing "micro-encryption" of information that is only observable as fluorescence under excitation. The same focused laser also facilitates on demand thinning down of WS multilayers into monolayers, turning them into fluorescence active components. With a scanning focused laser beam, micropatterns are readily created on WS multilayers through selective thinning of specific regions on the flake.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acsnano.6b07118 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Isoelectric Focusing Fractionation Method for Signal Enhancement in Detection of Inactivated Biological Agents Using Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry.
Electrophoresis
January 2025
National Institute for Nuclear, Chemical and Biological Protection, Kamenna, Czech Republic.
Timely identification of highly pathogenic bacteria is crucial for efficient mitigation of the connected harmful health effects. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) of intact cells enables fast identification of the microorganisms based on their mass spectrometry protein fingerprint profiles. However, the MALDI-TOF MS examination must be preceded by a time-demanding cultivation of the native bacteria to isolate representative cell samples to obtain indicative fingerprints.
View Article and Find Full Text PDFFocusing Effects on Laser-Induced Plasma Parameters: Applications to a Graphite Target Under Martian Atmospheric Conditions.
Appl Spectrosc
January 2025
Department of Physics & Applied Physics, Kennedy College of Sciences, University of Massachusetts Lowell, Lowell, Massachusetts, USA.
Under various atmospheric conditions, laser-induced breakdown spectroscopy (LIBS) is a powerful technique for elemental analysis, including in Earth- and Mars-like environments. However, understanding the plasma behavior and its dependence on ambient pressure and laser parameters remains a challenge. In this study, a numerical model based on a three-temperature Eulerian radiation framework under non-local thermodynamic equilibrium conditions is employed to investigate the interaction of a nanosecond laser pulse with a graphite target under helium (He) and carbon dioxide (CO atmospheres.
View Article and Find Full Text PDFLayer dependent thermal transport properties of one- to three-layer magnetic Fe:MoS.
Sci Rep
January 2025
Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ, 07030, USA.
Two-Dimensional transition metal dichalcogenides have been the subject of extensive attention thanks to their unique properties and atomically thin structure. Because of its unprecedented room-temperature magnetic properties, iron-doped MoS (Fe:MoS) is considered the next-generation quantum and magnetic material. It is essential to understand Fe:MoS's thermal behavior since temperature and thermal load/activation are crucial for their magnetic properties and the current nano and quantum devices have been severely limited by thermal management.
View Article and Find Full Text PDFHalf-wave nanolasers and intracellular plasmonic lasing particles.
Nat Nanotechnol
January 2025
Wellman Center for Photomedicine, Massachusetts General Hospital, Cambridge, MA, USA.
The ultimate limit for laser miniaturization would be achieving lasing action in the lowest-order cavity mode within a device volume of ≤(λ/2n), where λ is the free-space wavelength and n is the refractive index. Here we highlight the equivalence of localized surface plasmons and surface plasmon polaritons within resonant systems, introducing nanolasers that oscillate in the lowest-order localized surface plasmon or, equivalently, half-cycle surface plasmon polariton. These diffraction-limited single-mode emitters, ranging in size from 170 to 280 nm, harness strong coupling between gold and InGaAsP in the near-infrared (λ = 1,000-1,460 nm), away from the surface plasmon frequency.
View Article and Find Full Text PDFAn Imaged Capillary Isoelectric Focusing Separation of the Linear and Cyclic Variants of a Mimotope of the Cancer-Related CD20 Antigen-Validation and Statistical Evaluation.
J Sep Sci
January 2025
Department of Biosciences and Medical Biology, University of Salzburg, Salzburg, Austria.
Imaged capillary isoelectric focusing was successfully applied for separating an in-house synthesized closely related peptide pair, that is, a linear 12-mer (Rp5-L) and its cyclic 15-mer variant (Rp5-C). Rp5-L represents a mimotope, that is, an epitope mimicking peptide, of the CD20 antigen, which is over-expressed in B-cell-related tumors. Peptide identity-including the successful disulfide bond formation in Rp5-C-was confirmed with matrix-assisted laser desorption ionization-time of flight mass spectrometry.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!