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Composition engineered GNS/CNT Hybrid nanocomposites with enhanced thermal stability and tunable optical properties via one-step methane CVD
Abstract Graphene nanosheet/carbon nanotube (GNS/CNT) hybrid nanocomposites were produced using a one-step methane CVD method, employing a Mo–Mg–Fe catalytic system. This facilitated the concurrent growth and integration of graphitic elements. The impact of the Mo/Mg ratio on structural development, oxide chemistry, defect density, and thermal stability was examined in detail. SAED, TEM, and SEM revealed the coexistence of wrinkled graphene sheets linked with CNTs, while EDS and STEM showed even C, O, Mg, Mo, and Fe distribution. Raman indicated low defects (I D /I G ≈ 0.14), I 2D /I G = 0.33, and A 2D /A G ≈ 0.43, which reveals that samples have common characteristics of few to multilayer graphene structures. FTIR reflected Mo/Mg-dependent oxide and surface chemistry, and UV–Vis revealed broad, enhanced optical absorption. TGA conducted in an inert atmosphere demonstrated remarkable enhanced thermal stability, characterized by negligible mass loss (2–6%) up to 1000 °C; this stability is ascribed to the formation of Mo-assisted carbides and the mitigation of Mg volatilization. The CVD method creates hybrids that are structurally low in defects. These hybrids show improved thermal stability and allow for the adjustment of their physical and chemical properties. As a result, these findings confirm that changing the catalyst’s composition is a useful way to design carbon nanohybrids with multiple functions.
Holographic leaky-wave antennas with independently controlled multiple counter-rotating vortex beams
Nonlinear and lagged climatic drivers of malaria incidence in sub-Saharan Africa using multi-country panel analysis 2015–2024
Multidimensional tolerance towards Asian elephants varies with demographic and spatial correlates among rural communities in Sri Lanka
Experimental investigation on the remediation of Cd-contaminated paddy soil by electrogeochemical survey technology in Guilin city, Guangxi
Evolution of soil quality and microbial communities in arid pear orchards reveals pathways to sustainable management
ALTCCO: an enhanced cuckoo catfish optimizer with LightTrack strategy for engineering design and UAV trajectory optimization
Sustainable hydrogen production and potential anticancer applications of biofuel-derived silver decorated BiFeO3 nanostructures
Spatiotemporal analysis within spatial autocorrelation of COVID-19 in Saudi Arabia’s provinces
DiffDA-Net: diffusion-augmented domain adaptive network for analog circuit fault diagnosis under imbalanced and variable operating conditions
Thoracic ratio and diaphragmatic excursion predict lung function impairment in COPD patients
Smallholder dairy farmers’ milk marketing participation decision in North Mecha District, Ethiopia: a Heckman two-stage analysis
Sound is essential for observers to accurately assess unsuccessful conversations
Abstract Perceiving success in group conversations is central to social life, yet little is known about the extent to which the conversation success perceived by conversational partners aligns with that perceived by third-party observers. This study explores how third-party observers perceive conversation success across three sensory conditions (auditory-visual (AV), visual-only (V), and auditory-only (A)) to identify cues of which sensory domain signal perception of success. In two online experiments, older adults (57.1 years (SD = 6.1), N = 160 per experiment) watched and/or heard audio of 2-minute excerpts of previously recorded four-person conversations. Just as the original interlocutors had done themselves, observers provided continuous judgements of conversation success using a slider and an overall success rating after the conversation. Observers judged conversations in AV and V conditions (Experiment 1) and AV and A conditions (Experiment 2). Across both experiments, observers’ overall ratings generally aligned with interlocutors’ overall success ratings, showing that success can be assessed without active participation. However, for less successful conversations, observers overestimated success when deprived of auditory information (V condition) but not when deprived of visual information (A condition). These findings suggest that auditory cues provide the most critical information for assessing conversation failure, while visual cues alone may mislead observers.