Article
Materials Science, Multidisciplinary
Enrico Di Russo, Lorenzo Rigutti
Summary: The combination of atom probe tomography (APT) and optical spectroscopy has yielded original results in the field of semiconductor nanoscale heterostructures, providing a deeper understanding of carrier localization and recombination mechanisms in quantum-well systems through statistical correlation. Photoluminescence spectroscopy (PL) can be performed on APT samples, allowing for sequential correlations on a single nanoscale object with higher precision and accuracy.
Review
Chemistry, Physical
Sapna Sinha, Jamie H. Warner
Summary: Transmission electron microscopy (TEM) is a vital tool for studying nanomaterials at the atomic level, with graphene playing a key role in facilitating the characterization of other materials and understanding their properties and interactions. The review highlights the use of TEM with graphene as a substrate for studying a wide range of nanomaterials, discussing the challenges and potential engineering applications in the future.
Article
Chemistry, Physical
M. A. Mazo, A. C. Caballero, J. Rubio
Summary: In this study, cheap, abundant, and easily-obtained carbon fillers such as graphite and carbon black were successfully incorporated into a silicon oxycarbide matrix to obtain dense crack-free bulk composites with enhanced electrical and thermal conductivities. Raman parameters were crucial for understanding the electronic and/or phonon transport in the composites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Damjan Vengust, Bostjan Jancar, Tilen Sever, Andreja Sestan, Vid Bobnar, Zdravko Kutnjak, Nina Daneu, Danilo Suvorov, Matjaz Spreitzer
Summary: A novel approach to synthesizing complex composite materials based on intergrowths of sodium and calcium cobaltates was presented in this work, resulting in samples with excellent thermoelectric performance and improved stability. The mixed Ca-Na composition developed textured microstructures composed of intergrowths of both end-members, with the composition x = 0.8 (Ca:Na = 2.75) showing long-term stability after exposure to high humidity.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Joachim Dahl Thomsen, Kate Reidy, Thang Pham, Julian Klein, Anna Osherov, Rami Dana, Frances M. Ross
Summary: This study investigates nucleation control for metals deposited on two-dimensional materials in the absence of substrate effects and minimized heterogeneous nucleation sites. The results show that ultralow nucleation densities can be achieved on suspended graphene, with nucleation density on the adjacent supported substrate being 2-3 orders of magnitude higher.
Article
Chemistry, Physical
David Cooper, Christophe Licitra, Younes Boussadi, Badhise Ben-Bakir, Bruno Masenelli
Summary: The optoelectronic properties of a red emitting AlGaInP micro-diode device were measured using standard methods. The changes in electrostatic potential as a function of applied forward bias voltage were analyzed using off-axis electron holography. It was demonstrated that both the quantum wells and the band structure of the diode align at the same energy level at the threshold voltage for light emission. The research showed that off-axis electron holography is a valuable tool for measuring potential distribution in optoelectronic devices.
Article
Chemistry, Physical
Jin-Hu Dou, Maxx Q. Arguilla, Yi Luo, Jian Li, Weizhe Zhang, Lei Sun, Jenna L. Mancuso, Luming Yang, Tianyang Chen, Lucas R. Parent, Grigorii Skorupskii, Nicole J. Libretto, Chenyue Sun, Min Chieh Yang, Phat Vinh Dip, Edward J. Brignole, Jeffrey T. Miller, Jing Kong, Christopher H. Hendon, Junliang Sun, Mircea Dinca
Summary: Researchers have successfully grown single crystals of 2D metal-organic frameworks up to 200 µm in size by balancing in-plane and out-of-plane interactions, revealing anisotropic transport and a clear correlation between conductivity and the nature of the metal cation in the sheets.
Article
Chemistry, Physical
Zonglin Li, Mingxin Xie, Guozheng Nie, Junhui Wang, Lujun Huang
Summary: In this study, we developed an optical biosensor based on an all-dielectric metasurface with broken symmetry. The biosensor exhibited excellent performance, thanks to the high-Q quasi-bound states in the continuum (qBICs) and the efficient field confinement. It has potential applications in extreme biochemical sensing, such as COVID-19 detection at ultralow concentrations.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Ruben Bueno Villoro, Raana Hatami Naderloo, Dominique Alexander Mattlat, Chanwon Jung, Kornelius Nielsch, Christina Scheu, Ran He, Siyuan Zhang
Summary: Complex microstructures are crucial for thermoelectric materials to optimize power conversion efficiency. Grain boundaries (GBs) can reduce thermal conductivity but often decrease electrical conductivity. Recent research has shown that elemental segregation at GBs can make them electrically conductive and improve thermoelectric properties. In this study, InSb was added to Nb0.95Ti0.05FeSb to selectively modify the GBs' chemistry without increasing the carrier concentration of the matrix. The addition of InSb successfully increased power factor and zT of fine-grained Nb0.95Ti0.05FeSb, overcoming the negative impact of GBs on power factor.
MATERIALS TODAY PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Juan Alcaniz-Monge, Gema Gil-Munoz, Guido Trautwein, Santiago Reinoso
Summary: Carbon-ceramic composites (C/Cer) were prepared by chemical vapor deposition of coal tar pitch onto clay substrates and characterized using various techniques. The study showed that the C/Cer composites are n-type semiconductors and their electrical conduction mechanism follows the expected pathways for amorphous solids. The transport properties of C/Cer composites are strongly dependent on the clay components as observed in microscopy experiments.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Nanoscience & Nanotechnology
Dayne F. Swearer, Stefan Fischer, Daniel K. Angell, Chris Siefe, A. Paul Alivisatos, Steven Chu, Jennifer A. Dionne
Summary: Our study involved the development of a library of 11 unique lanthanide-doped nanophosphors for high-resolution, multicolor electron microscopy. Transmission electron microscopy revealed that these nanophosphors exhibit strong cathodoluminescence spectra under electron beam, with high spatial localization characteristics.
Article
Materials Science, Multidisciplinary
Manisekaran Hemagirri, Sreenivasan Sasidharan
Summary: This study evaluated the antiaging activity of Polyalthia longifolia leaf methanolic extract (PLME) using three microscopic approaches. The results showed that PLME treatment accelerated yeast cell lifespan, delayed the formation of apoptotic-like vacuoles, and improved cellular morphology.
MICROSCOPY AND MICROANALYSIS
(2022)
Review
Chemistry, Multidisciplinary
Zu-Wei Yin, Wenguang Zhao, Jianyuan Li, Xin-Xing Peng, Cong Lin, Mingjian Zhang, Zhiyuan Zeng, Hong-Gang Liao, Haibiao Chen, Hai Lin, Feng Pan
Summary: This article introduces the importance of EELS as a powerful tool for chemical compositional analyses in battery studies, as well as its role in revealing abundant information in materials. It also looks ahead at the future development of EELS techniques and their potential applications in battery research.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Munmun Basak, Md Lutfor Rahman, Md Farid Ahmed, Bristy Biswas, Nahid Sharmin
Summary: Cobalt ferrite nanoparticles were synthesized using co-precipitation technique with different precipitating agents, affecting the structure and size distribution. Various analysis methods showed highly correlated results, with SSP method being the most compatible.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Martin Ek, C. Leon M. Petersson, Jesper Wallentin, David Wahlqvist, Aylin Ahadi, Magnus Borgstrom, Reine Wallenberg
Summary: Nanowire growth enables creation of embedded heterostructures, but poses challenges for compositional characterization through transmission electron microscopy. Residual strain in certain regions can cause the two characterization techniques to diverge from the true value.