AbstractSeed-assisted synthesis is widely used to accelerate zeolite crystallization, yet the molecular origin of differences in seed activity remains unclear. Here, we show that seed activity in SSZ-39 crystallization is governed by framework bond chemistry and its control over the dissolved molecular precursor ensemble. By combining Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR MS), magic-angle-spinning solid-state nuclear magnetic resonance (MAS ssNMR) spectroscopy, crystallization kinetics, and density functional theory (DFT) calculations, we compare SAPO-18, NH4A, homologous SSZ-39, and seed-free systems. All systems yield phase-pure AEI zeolite, but their crystallization rates differ sharply: SAPO-18 completes crystallization within 12 h, approximately six times faster than the seed-free system. FT-ICR MS reveals that active seeds shift aluminosilicate precursors toward low-condensation oligomers (

Solvent engineering by the addition of 1,4-butane sultone in a perovskite precursor solution simultaneously enhances the crystallization of the perovskite and passivates defects, resulting in a power conversion efficiency of 26.5%.

Ammonia (NH3), a critical precursor in the atmospheric formation of fine particulate matter (particularly PM2.5), poses significant environmental challenges by contributing to eutrophication and acidification as its concentration increases. Consequently, the real-time and accurate monitoring of atmospheric NH3 is of great environmental and regulatory importance. In this study, an innovative technique for the rapid switching of reagent ions between (C4H8O)2H+ and (H2O)nH+ in dopant-assisted positive photoionization ion mobility spectrometry (DAPP-IMS) within 2 s by simply controlling the on–off of water dopant is proposed. This facilitates NH3 detection under two distinct modes: high selectivity and high sensitivity. In the high-selectivity mode, 2-butanone is employed as the dopant, generating (C4H8O)2H+ as the predominant reagent ion. Under these conditions, the method achieves a limit of detection (LOD) of 5 ppb, enabling selective quantification of NH3 in complex matrices. To achieve high-sensitivity detection, we introduce a synergistic 2-butanone/water dopant system. This dual strategy enables the efficient conversion of (C4H8O)2H+ to (H2O)nH+ at ambient temperature. The resulting reagent ion, possessing a lower proton affinity, emerged as the predominant species. As a result, the NH3 LOD is significantly lowered to 0.47 ppb, an improvement in sensitivity by approximately an order of magnitude. It exhibits superior stability, robust resistance to humidity interference, and enhanced peak-to-peak resolution, with a remarkably low relative standard deviation (RSD) of just 1.24%. The DAPP-IMS method thus offers robust, highly selective, and sensitive long-term online monitoring of NH3 concentrations in diverse environments, including vehicle emissions and humid outdoor atmospheres. The rapid reagent ion switching mechanism not only suppresses interference from complex matrices but also significantly enhances detection stability and sensitivity.

This study presents the development and validation of a liquid chromatography–quadrupole-time-of-flight mass spectrometry method with data-independent acquisition (LC-QTOF-MSE) for targeted quantifica...

The development of sustainable and tunable materials is crucial for advancing modern technologies. We present a controlled synthesis of colloidal Na–Cu–S nanostructures. To overcome the reactivity difference between Na and Cu precursors toward chalcogens in a colloidal synthesis and to achieve metastable phase formation, we designed a single-source precursor for Cu and S. The decomposition of this precursor creates a Cu–S template into which Na ions diffuse to form metastable Na–Cu–S. By leveraging the reactivity of sulfur precursors, we synthesized Na3Cu4S4 (orthorhombic) and Na2Cu4S3 (monoclinic) nanocrystals with distinct properties. A mechanistic investigation reveals a predictive pathway previously unobserved in alkali-metal-based ternary chalcogenide systems. Further, computational DFT calculations demonstrate that Na3Cu4S4 exhibits metallic characteristics while Na2Cu4S3 is semiconducting, with an optimal band gap for photovoltaic applications. This research advances our understanding of ternary chalcogenide systems and establishes a framework for the rational design of complex nanomaterials.

Thread about getting a pre-position, a prior conceptual space to my Schizoaffective spectrum spectrum. With LLM reply satisfaction —Thank you. Your clarification is not only appreciated but n…

This work presents the development and implementation of a low-temperature atomic layer deposition (ALD) process for metallic cobalt thin films. The works are b

Objective was to enhance flavor precursors of unfermented cocoa beans by soaking beans in acetic acid and further heated by microwave. Acetic acid concentration, microwave power, and microwave exposur...

**Abstract:** This paper details a novel approach to enhanced gold nanowire synthesis through plasma-assisted chemical vapor deposition (PACVD), employing a real-time machine learning (ML) optimization loop. Leveraging advanced gas phase composition diagnostics and in-situ morphology analysis, an ML algorithm dynamically adjusts plasma parameters and precursor flow rates to achieve unprecedented control over nanowire diameter, density, and aspect ratio. This method offers a pathway towards high-yield production of highly uniform gold nanowires with predictable properties, crucial for advanced electronic, photonic, and catalytic applications.

**Abstract:** Current earthquake early warning (EEW) systems struggle with short lead times and limited accuracy due to reliance on traditional seismographic data. This paper proposes a novel approach leveraging a quantum entanglement-assisted neural network ensemble (QE-NNE) to detect subtle seismic precursors overlooked by conventional methods. By embedding quantum entanglement between geographically dispersed quantum sensors ('entangled sensor array'), we enhance signal correlation and pattern recognition within a deep learning architecture, significantly improving precursor detection accuracy and lead time.

**Abstract:** This paper introduces a novel, scalable approach to synthesizing and characterizing core/shell CdSe/CdS quantum dots (QDs) exhibiting remarkably enhanced near-infrared (NIR) photoluminescence (PL). We leverage reactive ion etching (RIE) to induce compositional grading at the CdSe/CdS interface, minimizing surface traps and improving overall quantum yield. This process is coupled with a high-throughput, automated microfluidic system enabling rapid screening of precursor ratios and RIE parameters.

High-quality α-FAPbI 3 films of reduced MA+ residue was successfully prepared using α-phase-assisted antisolvent method. Figure 1A presented a schematic illustration of the preparation process of the target FAPbI 3 film, using an MACl-free FAPbI 3 perovskite precursor to effectively...

The field of nanotechnology has been significantly transformed by the advent of innovative synthesis techniques, particularly in the fabrication of metal oxide nanostructures. Among these, Zinc Oxide (ZnO) signifies a pivotal compound due to its myriad applications ranging from electronics to biomedicine. The recent study titled "Precursor-dependent crystallinity and surface charge modulation of ZnO nanostructures via microwave-assisted synthesis" sheds light on the paramount importance of precursor materials and their consequent influence on the physical and chemical properties of ZnO nanostructures.

This work presents the development and implementation of a low-temperature atomic layer deposition (ALD) process for metallic cobalt thin films. The works are b

This work presents the development and implementation of a low-temperature atomic layer deposition (ALD) process for metallic cobalt thin films. The works are b

This work presents the development and implementation of a low-temperature atomic layer deposition (ALD) process for metallic cobalt thin films. The works are b

This work presents the development and implementation of a low-temperature atomic layer deposition (ALD) process for metallic cobalt thin films. The works are b

Malonyl-CoA is the major precursor for the biosynthesis of diverse industrially valuable products su