Article
Chemistry, Multidisciplinary
Amin Reihani, Yuxuan Luan, Shen Yan, Ju Won Lim, Edgar Meyhofer, Pramod Reddy
Summary: The quantitative mapping of temperature fields with nanometric resolution is crucial in various scientific research areas and emerging technologies. Recent advances in scanning thermal microscopy (SThM) have enabled simultaneous quantification of tip-sample thermal resistance and topography, allowing for quantitative thermometry even in situations where the temperature field is modulated. The introduction of a modulated heat input to the scanning thermal probe (STP) allows for the mapping of unmodulated temperature fields with high spatial and temperature resolution, facilitating temperature mapping of microdevices under practical operating conditions.
Article
Chemistry, Analytical
Adam Laszcz, Andrzej Czerwinski, Emilia Pruszynska-Karbownik, Marek Wzorek, Dariusz Szmigiel
Summary: The FIB technique was used to fabricate a nanothermocouple based on a metal-semiconductor structure, which showed higher sensitivity and linear response compared to traditional metal-metal nanothermocouples. It is suitable for characterizing laser beams with nanometer spatial resolution.
Article
Physics, Applied
Jiahua Cai, Mingcong Dai, Sai Chen, Peng Chen, Jiaqi Wang, Hongting Xiong, Zejun Ren, Shaojie Liu, Zhongkai Liu, Caihua Wan, Ming Bai, Xiaojun Wu
Summary: In this study, efficient injection and accurate detection of femtosecond THz spin currents with nanoscale lateral spatial resolution were achieved using spintronic THz emission nanoscopy (STEN). The integration of nanophotonics, nanospintronics, and THz-nanotechnology into a unified platform enables the characterization of spin states at micro-to-nanoscale densities and accelerates the development of high-frequency spintronic optoelectronic nanodevices, as well as catalyzing other revolutionary technical applications.
APPLIED PHYSICS REVIEWS
(2023)
Article
Nanoscience & Nanotechnology
Kenan Elibol, Clive Downing, Richard G. Hobbs
Summary: In this work, the fabrication and spectroscopic characterization of subwavelength aluminum nanocavities on suspended SiN x membranes are reported. The volume plasmon (VP) and localized surface plasmon resonance (LSPR) modes of these cavities are revealed and studied using electron energy-loss spectroscopy (EELS) and electromagnetic simulations. Dipolar LSPR modes resonant in the UV and blue regions as well as higher-energy optically dark quadrupolar and hexapolar LSPR modes are observed. The asymmetries in the fabricated nanocavities result in a mode mixing and a shift in dipolar dark LSPR modes.
Article
Nanoscience & Nanotechnology
Shuo Zhang, Vivek Garg, Gediminas Gervinskas, Ross K. W. Marceau, Emily Chen, Rakesh G. Mote, Jing Fu
Summary: The proposed method allows lifting nano- or microscale specimens to a desired height in situ by controlling FIB irradiation parameters, and detailed investigations have been conducted on the IIB mechanisms. Results suggest IIB as a universal phenomenon applicable to various materials for sample preparation, and have been successfully demonstrated for site-specific TEM imaging of gold nanoparticles.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Ovidiu Cretu, Dai-Ming Tang, Da-Bao Lu, Bo Da, Yoshihiro Nemoto, Naoyuki Kawamoto, Masanori Mitome, Zejun Ding, Koji Kimoto
Summary: We have mapped the temperature distribution of suspended carbon nanotubes at the 5-nm level inside a transmission electron microscope using electron energy-loss plasmon spectroscopy. The results show that these nanotubes can withstand extremely high current densities and temperatures, confirming them as ideal candidates for interconnects.
Article
Chemistry, Multidisciplinary
Benedikt Haas, Tara M. Boland, Christian Elsaesser, Arunima K. Singh, Katia March, Juri Barthel, Christoph T. Koch, Peter Rez
Summary: Phonon scattering at grain boundaries plays a crucial role in controlling the thermal conductivity of nanoscale devices. This study uses monochromated electron energy loss spectroscopy (EELS) in the scanning transmission electron microscope (STEM) to measure the 60 meV optic mode at grain boundaries in silicon at atomic resolution. The results show the existence of localized phonon modes and support the idea that grain boundaries can act as waveguides.
Article
Chemistry, Analytical
Kiyohisa Nii, Wataru Inami, Yoshimasa Kawata
Summary: Researchers developed a high spatially-resolved ion-imaging system using focused electron beam excitation. By applying a photoresist to the sensing surface of the ion-sensor substrate, they evaluated the spatial resolution of the imaging system and achieved a resolution of 216 nm, which is higher than that reported in previous systems.
Article
Physics, Multidisciplinary
Marc R. Bourgeois, Elliot K. Beutler, Siamak Khorasani, Nicole Panek, David J. Masiello
Summary: Exciton polaritons are important light-matter excitations with potential applications. By using lattice electron energy gain spectroscopy, the characteristics of EPs in nanoscale structured cavities can be measured.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Applied
Victor Boureau, Michal Stano, Jean-Luc Rouviere, Jean-Christophe Toussaint, Olivier Fruchart, David Cooper
Summary: This study compares two TEM techniques for highly spatially resolved quantitative measurements of magnetic induction fields, showing that the pixelated STEM approach provides better sensitivity at the expense of spatial resolution. The results indicate that off-axis electron holography and pixelated differential phase contrast are effective methods for measuring magnetic induction in nanowires.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Biology
Massimiliano Berardi, Kevin Bielawski, Niek Rijnveld, Grzegorz Gruca, Hilde Aardema, Leni van Tol, Gijs Wuite, B. Imran Akca
Summary: Micropipette aspiration (MPA) is a valuable tool in mechanobiology, with the development of a highly sensitive system for studying the nanoscale behavior of soft biomaterials. Real-time measurements have resulted in consistent and reproducible values for characterizing the rheological behavior of cells and soft materials at very small deformations.
COMMUNICATIONS BIOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Frances Allen, Thomas C. Pekin, Arun Persaud, Steven J. Rozeveld, Gregory F. Meyers, Jim Ciston, Colin Ophus, Andrew M. Minor
Summary: High-throughput grain mapping with sub-nanometer spatial resolution is demonstrated using scanning nanobeam electron diffraction combined with high-speed direct-electron detection. The study compares two unsupervised feature learning techniques, principal component analysis and non-negative matrix factorization, and discusses the potential of the 4D-STEM approach for statistical analysis of grain orientations at high spatial resolution.
MICROSCOPY AND MICROANALYSIS
(2021)
Article
Nanoscience & Nanotechnology
Pei Zeng, Zhiwen Shu, Shi Zhang, Huikang Liang, Yuting Zhou, Dedong Ba, Zhanzu Feng, Mengjie Zheng, Jianhui Wu, Yiqin Chen, Huigao Duan
Summary: This study successfully demonstrates an effective approach for forming ultrasmall metallic nanogaps based on the spontaneous nanoscale dewetting effect during metal deposition. By adjusting the initial opening size of the exposed resist template, tiny metallic nanogaps can be obtained. The method is effective for fabricating sub-10 nm silver nanostructure gaps and even sub-5 nm metallic gaps.
Article
Optics
Chene Tradonsky, Simon Mahler, Gaodi Cai, Vishwa Pal, Ronen Chriki, Asher A. Friesem, Nir Davidson
Summary: The method involves a digital degenerate cavity laser, phase-only spatial light modulator, and spatial filters to control the intensity, phase, and coherence distributions of laser beams. It can generate high-resolution arbitrary shaped laser beams with minimal change in output power by reshaping the beams efficiently through free space propagation.
Article
Nanoscience & Nanotechnology
Rajgowrav Cheenikundil, Julien Bauer, Mehrdad Goharyan, Massimiliano d'Aquino, Riccardo Hertel
Summary: Artificially fabricated three-dimensional magnetic nanostructures, particularly the interconnected nanowire arrays forming artificial spin-ices, exhibit unique physical properties and potential applications in reprogrammable magnonic devices.
Article
Chemistry, Physical
Chi Xu, Dhruve Ringwala, Duo Wang, Lei Liu, Christian D. Poweleit, Shery L. Y. Chang, Houlong L. Zhuang, Jose Menendez, John Kouvetakis
CHEMISTRY OF MATERIALS
(2019)
Article
Engineering, Chemical
Albert M. Hung, Farideh Pahlavan, Sheyda Shakiba, Shery L. Y. Chang, Stacey M. Louie, Elham H. Fini
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2019)
Article
Chemistry, Physical
Yongfeng Zhao, Arun Sundar S. Singaravelu, Xia Ma, Qingdong Zhang, Shery L. Y. Chang, Xiangfa Liu, Nikhilesh Chawla
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Chemistry, Physical
Fionan Davitt, Killian Stokes, Timothy W. Collins, Manuel Roldan-Gutierrez, Fred Robinson, Hugh Geaney, Subhajit Biswas, Shery L. Y. Chang, Kevin M. Ryan, Gillian Reid, Justin D. Holmes
ACS APPLIED ENERGY MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Ethan L. Lawrence, Barnaby D. A. Levin, Tara Boland, Shery L. Y. Chang, Peter A. Crozier
Summary: The study characterized the variation of oxygen vacancy creation and annihilation rates on oxide nanoparticle surfaces using in situ transmission electron microscopy, revealing that low coordination number sites and locally strained sites exhibit enhanced surface oxygen vacancy activity.
Article
Chemistry, Physical
Ahmed Yousaf, Matthew S. Gilliam, Shery L. Y. Chang, Mathias Augustin, Yuqi Guo, Fraaz Tahir, Meng Wang, Alexandra Schwindt, Ximo S. Chu, Duo O. Li, Suneet Kale, Abhishek Debnath, Yongming Liu, Matthew D. Green, Elton J. G. Santos, Alexander A. Green, Qing Hua Wang
Summary: Metal diborides are ceramic materials with unique crystal structures, and ultrasonication-assisted exfoliation can produce stable dispersions of quasi-2D nanosheets. These nanosheets can be directly incorporated into polymer composites, enhancing their mechanical properties and expanding their potential applications.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Tobias Foller, Rahman Daiyan, Xiaoheng Jin, Joshua Leverett, Hangyel Kim, Richard Webster, Jeaniffer E. Yap, Xinyue Wen, Aditya Rawal, K. Kanishka H. De Silva, Masamichi Yoshimura, Heriberto Bustamante, Shery L. Y. Chang, Priyank Kumar, Yi You, Gwan-Hyoung Lee, Rose Amal, Rakesh Joshi
Summary: Studies have shown that the properties of graphene oxide (GO) can be improved by increasing its graphitic domain size through thermal diffusion and clustering of functional groups. The integrity of the functional groups during this process has been confirmed through comprehensive chemical analysis. Additionally, the sheet resistance of GO can be reduced by several orders of magnitude during mild thermal annealing.
Article
Chemistry, Multidisciplinary
Taro Yoshikawa, Ming Liu, Shery L. Y. Chang, Inga C. Kuschnerus, Yuto Makino, Akihiko Tsurui, Tomoaki Mahiko, Masahiro Nishikawa
Summary: Detonation nanodiamonds have promising applications in various fields. This study characterized the dispersion of non-functionalized and polyglycerol-functionalized DNPs in aqueous suspensions at different ionic strengths. The results showed that functionalized DNPs and increased ionic strength can lead to monodisperse and non-aggregated DNP colloids.
Article
Nanoscience & Nanotechnology
Fionan Davitt, Kamil Rahme, Sreyan Raha, Shane Garvey, Manuel Roldan-Gutierrez, Achintya Singha, Shery L. Y. Chang, Subhajit Biswas, Justin D. Holmes
Summary: In this study, highly crystalline layered SnSe nanoribbons were grown using a simple solution-phase approach. The use of PVP as a templating agent allowed for selective passivation of certain facets, resulting in unique growth of nanoribbons along their b-axis with a defined zigzag edge state. The SnSe nanoribbons exhibited few layers, wide widths, and achievable lengths, with the ability to produce them in high quantities in a single batch experiment. The use of non-toxic PVP as a replacement for toxic amines in other forms of SnSe is an important advantage for sustainable and environmentally friendly applications. The heat transport properties of the SnSe nanoribbons, determined through power-dependent Raman spectroscopy, demonstrate their potential as thermoelectric materials.
Article
Chemistry, Multidisciplinary
Haotian Wen, Jose Maria Luna-Romera, Jose C. Riquelme, Christian Dwyer, Shery L. Y. Chang
Summary: The morphology of nanoparticles plays a crucial role in determining their properties for various applications. Transmission electron microscopy (TEM) is an effective technique for characterizing nanoparticle morphology at atomic resolution. Developing efficient and automated methods for statistically significant particle metrology is essential for advancing precise particle synthesis and property control.
Article
Chemistry, Multidisciplinary
Haotian Wen, Xiaoxue Xu, Soshan Cheong, Shen-Chuan Lo, Jung-Hsuan Chen, Shery L. Y. Chang, Christian Dwyer
Summary: Researchers have developed an unsupervised, soft classification machine learning method to measure the shapes of nanoparticles, which offers greater flexibility compared to existing methods. Their method demonstrates robustness across various nanoparticle systems, from laboratory-scale to mass-produced synthesis.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Multidisciplinary
Samir A. El-Demrdash, Reece Nixon-Luke, Lars Thomsen, Anton Tadich, Desmond W. M. Lau, Shery L. Y. Chang, Tamar L. Greaves, Gary Bryant, Philipp Reineck
Summary: Detonation nanodiamonds (DNDs) self-assemble into fractal-like aggregates in water, with two particle aggregate populations observed. The presence of salt does not significantly affect the size or shape of the aggregates. As DND concentration increases, the aggregates become denser and change shape from disk-like to rod-like. This study contributes to the understanding of DNDs' colloidal properties and potential future applications.
Article
Chemistry, Multidisciplinary
George Opletal, Shery L. Chang, Amanda S. Barnard
Article
Chemistry, Multidisciplinary
Shery L. Y. Chang, Philipp Reineck, Dewight Williams, Gary Bryant, George Opletal, Samir A. El-Demrdash, Po-Lin Chiu, Eiji Osawa, Amanda S. Barnard, Christian Dwyer
Article
Materials Science, Multidisciplinary
David Kordahl, Lance W. Q. Xu, Shery L. Y. Chang, Christian Dwyer
