Article
Optics
Yuchen Dai, Pengfei Qi, Guangyi Tao, Guangjie Yao, Beibei Shi, Zhixin Liu, Zhengchang Liu, Xiao He, Pu Peng, Zhibo Dang, Liheng Zheng, Tianhao Zhang, Yongji Gong, Yan Guan, Kaihui Liu, Zheyu Fang
Summary: This letter investigates phonon-assisted photon upconversion (UPC) in twisted 2D semiconductors, where an inverted contrast between UPC and conventional photoluminescence (PL) of WSe2 twisted bilayer emerges. A 4-fold UPC enhancement is achieved in the 5.5 degrees twisted bilayer while PL weakens by half. The rotation-angle-dependent UPC enhancement is attributed to reduced interlayer exciton conversion efficiency driven by lattice relaxation and enhanced pump efficiency resulting from spectral redshift. This counterintuitive phenomenon provides a novel insight into the effect of twisted angle on UPC and light-matter interactions in 2D semiconductors. Furthermore, the UPC enhancement platform with various superimposable means offers an effective method for lighting bilayers and expanding the application prospect of 2D stacked van der Waals devices.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Physics, Multidisciplinary
Davoud Adinehloo, Weilu Gao, Ali Mojibpour, Junichiro Kono, Vasili Perebeinos
Summary: The electrical conductivity of macroscopic assemblies of nanomaterials is determined by the interplay between electronic transport and phonons. Phonons can reduce conductivity through electron scattering, but also enhance it by aiding electron propagation. In this study, we found that phonon-assisted coherent electron transport is the dominant mechanism for high-temperature transport in carbon nanotubes. This discovery proves the potential of single-chirality carbon nanotube films as unique solid-state ensembles for the development of room-temperature coherent electronic devices.
PHYSICAL REVIEW LETTERS
(2023)
Article
Optics
A. Olivera, K. Sinha, P. Solano
Summary: The resonant dipole-dipole interaction between two atoms can be enhanced by an aplanatic lens, opening new avenues for studying macroscopic dipole-dipole interactions.
Article
Nanoscience & Nanotechnology
Daniel Lewis, Brendan Jordan, Michael Pedowitz, Daniel J. Pennachio, Jenifer R. Hajzus, Rachael Myers-Ward, Kevin M. Daniels
Summary: The study on quasi-freestanding bilayer epitaxial graphene devices reveals efficient electron emission assisted by phonons in low vacuum conditions, with device morphology affecting emission performance.
Article
Chemistry, Multidisciplinary
Levente Mathe, Zoltan Kovacs-Krausz, Ioan Botiz, Ioan Grosu, Khadija El Anouz, Abderrahim El Allati, Liviu P. P. Zarbo
Summary: We theoretically analyze the phonon-assisted tunneling transport in a quantum dot connected to a Majorana bound state in a topological superconducting nanowire. We investigate the behavior of the current through the dot under different experimentally relevant parameters and the influence of electron-phonon coupling. The presence of electron-phonon coupling affects the current behavior similarly to the renormalized gate voltage. At large bias voltages, the current presents a dip or a plateau, depending on the size of the dot-Majorana coupling. Our results reveal the complex physics of quantum dot devices used to study Majorana bound states.
Article
Physics, Multidisciplinary
Xian-Di Wang, Xiao-Qi Wang, Hong-Yu Sun, Xue-Feng Dai, Qi Wang, Wei-Jiang Gong
Summary: In this study, we investigate the Andreev reflection in a heterostructure formed by the indirect coupling between a metallic lead and Majorana zero mode via a quantum dot affected by the electron-phonon interaction. Our results show that the zero-bias conductance value governed by the Majorana zero mode is independent of the electron-phonon interaction at zero temperature, but the interaction exacerbates the suppression of the magnitude of zero-bias conductance at finite temperature. These findings can help in distinguishing the signature of the Majorana zero mode in the Andreev reflection process.
Article
Multidisciplinary Sciences
Mir Mohammad Sadeghi, Yajie Huang, Chao Lian, Feliciano Giustino, Emanuel Tutuc, Allan H. MacDonald, Takashi Taniguchi, Kenji Watanabe, Li Shi
Summary: The peculiar electron-phonon interaction in graphene heterostructures enables ultrahigh mobility, electron hydrodynamics, superconductivity, and superfluidity. A peak in the Lorenz ratio near 60 kelvin and its decrease with increased mobility are observed in degenerate graphene, indicating an unusual behavior. This experimental observation, combined with ab initio calculations and analytical models, suggests that broken reflection symmetry in graphene heterostructures can relax the selection rule for electron coupling with flexural phonons, contributing to the increase of the Lorenz ratio at intermediate temperatures.
Article
Chemistry, Multidisciplinary
Sung Tae Yoo, Kyu Chang Park
Summary: In this article, a novel method of EUV generation by irradiating Sn with electrons emitted from a carbon nanotube-based cold cathode electron beam was demonstrated. The intensity of EUV can be controlled by the number of emitted electrons. This method has significant implications for advanced lithography for semiconductor fabrication and high-resolution photonics.
Article
Physics, Condensed Matter
Ri Betancourt-Riera, Re Betancourt-Riera, M. Fernandez-Lozada, L. A. Ferrer-Moreno, A. D. Sanu-Ginarte
Summary: In this study, a theory of one-phonon resonant Raman scattering model for semiconductor nanowires with cylindrical symmetry was developed, considering the effects of an external electric field. The mathematical expressions for Raman scattering differential cross section and efficiency were obtained, showing an increase in Raman efficiency and the appearance of singularities in the Raman spectra due to the presence of the electric field.
SUPERLATTICES AND MICROSTRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Yocefu Hattori, Jie Meng, Kaibo Zheng, Ageo Meier de Andrade, Jolla Kullgren, Peter Broqvist, Peter Nordlander, Jacinto Sa
Summary: By adjusting the operating temperature, the hot electron generation and transfer in plasmonic semiconductor materials can be optimized, contrasting with photodriven processes in nonplasmonic systems. This effect appears to be related to an enhancement in hot carrier generation due to phonon coupling. This discovery provides a new strategy for the optimization of photodriven energy production and chemical synthesis.
Article
Nanoscience & Nanotechnology
Vipin Kumar, Pushpendra Kumar
Summary: The relaxation phenomenon of carriers through the scattering of electrons by long-wavelength phonons in suspended monolayer and bilayer graphene is reported to understand the effect of electron-phonon interaction on the anomalous Rabi oscillations. The electron-phonon interaction in monolayer and bilayer graphene does not significantly induce the relaxation of charge carriers, indicating the robustness of anomalous Rabi oscillations near the Dirac point.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Nanoscience & Nanotechnology
Eunsol Go, Jae-Woo Kim, Jin-Woo Jeong, Sora Park, Jun-Tae Kang, Sunghoon Choi, Ji-Hwan Yeon, Yoon-Ho Song
Summary: This study investigates the influence of the supporting layer in carbon nanotube paste emitters on electron transport behavior. The diffusion-induced reaction and diffusion-limited reaction mechanisms under different annealing conditions are studied. The results show that the characteristics of the supporting layer affect the field electron emission performance of the carbon nanotube paste emitters, which in turn affects their temperature dependence.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Chaopeng Zhao, Weishan Yan, Wangyang Zhang, Duo Liu
Summary: This study demonstrates that phonons can promote the relaxation of metastable centers in ZnO through the electron-phonon interaction. The findings provide valuable guidance for the development of novel quantum and photoactive devices.
Article
Chemistry, Multidisciplinary
Jun Soo Han, Sang Heon Lee, Hanbin Go, Soo Jin Kim, Jun Hong Noh, Cheol Jin Lee
Summary: A cold cathode X-ray tube utilizing a carbon nanotube field emitter was developed, exhibiting high tube current density, high electron beam transmittance, and small focal spot size. Additionally, the tube showed stable lifetime and can be widely used in various X-ray applications in the future.
Article
Engineering, Electrical & Electronic
Anupriya Singh, Soumitra Satapathi
Summary: The study investigates the temperature-dependent band gap engineering and reversible thermochromism in all-inorganic antimony-based Cs3Sb2Br9 single crystals. The crystals change color from yellow to deep orange at high temperatures and return to yellow at room temperature. High-energy phonons are identified as the primary cause for the reduction in indirect band gap.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Anatomy & Morphology
Ming Zhou, Akimitsu Ishizawa, Hideo Akashi, Ryoji Suzuki, Yoshio Bando
Summary: This study classified variations of the flexor carpi radialis with accessory muscular bundles and different insertions of the tendon. These findings are important for anatomical education and have significant implications in clinical diagnosis and therapies.
ANATOMICAL SCIENCE INTERNATIONAL
(2023)
Article
Engineering, Environmental
Taotao Meng, Zhengtong Li, Zhangmin Wan, Jing Zhang, Luzhen Wang, Kangjie Shi, Xiangting Bu, Saad M. Alshehri, Yoshio Bando, Yusuke Yamauchi, Dagang Li, Xingtao Xu
Summary: Soil water extraction based on interfacial solar-thermal technology using a double-layer solar evaporator with a ZIF-8-derived carbon coating on a wood sponge can efficiently achieve evaporation and provide clean drinking water in arid inland areas. The wood sponge offers water-extraction advantages due to its super hydrophilic channels, while the carbon coating promotes photothermal conversion. The double-layer solar evaporator exhibits high sunlight absorbance, low thermal conductivity, stronger capillary force, and rapid water transport.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Qianqian Wang, Shuaihua Zhang, Zhi Li, Zhi Wang, Chun Wang, Saad M. Alshehri, Yoshio Bando, Yusuke Yamauchi, Qiuhua Wu
Summary: In this study, a series of novel hypercrosslinked polymers with adjustable polarity were designed and synthesized for the preconcentration of aflatoxins. By integrating magnetism into the polymers, a magnetic sorbent was prepared and displayed excellent adsorption ability. The method achieved good linearity, low detection limits, and high enrichment factors.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
A. T. Matveev, K. L. Firestein, A. S. Konopatsky, I. N. Volkov, D. V. Leybo, A. P. Koskin, A. A. Vedyagin, D. V. Golberg, P. B. Sorokin, D. V. Shtansky
Summary: A new simple and scalable method for synthesizing nanocrystalline Pt-containing hexagonal boron oxynitride (Pt/BN(O)) is proposed. Pt is present only in the form of single atoms (SAs) and clusters at a minimum content of 0.0085 wt%. This sample shows high catalytic activity for CO oxidation with a specific CO2 productivity as high as 176 molCO2/gPt/h at 300 degrees C, and it retains its activity after four cycles.
Article
Nanoscience & Nanotechnology
Yanxia Lin, Yu Cao, Haozhe Lu, Chenchen Liu, Zirui Zhang, Chuanhong Jin, Lian-Mao Peng, Zhiyong Zhang
Summary: In this study, a process is developed to clean residual polymers and release stress by wet etching the Si/SiO2 substrate surface underneath the aligned semiconducting carbon nanotube (ACNT) film. Top-gated ACNT field-effect transistors (FETs) fabricated with this process exhibit significant improvement in terms of saturation on-current, peak transconductance, hysteresis, and subthreshold swing. These improvements are attributed to the increase in carrier mobility after the substrate surface refreshing process.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Yuxian Deng, Yanyang Long, Aling Song, Haiyan Wang, Shuo Xiang, Ye Qiu, Xingyi Ge, Dmitri Golberg, Qunhong Weng
Summary: Lysosome-targeting probes based on boron and nitrogen co-doped carbon quantum dots exhibit high quantum yield, excellent fluorescence stability, and can be used for tracking cell apoptosis, necrosis, and endosomal escape.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Hanqing Yin, Xin Mao, Stuart Bell, Dmitri Golberg, Aijun Du
Summary: In this study, TM-free alloy catalysts based on indium and p-block elements were proposed for the electroreduction of nitrate to ammonia, showing an extraordinary performance. A novel reaction pathway was identified on the In3Sn(100) surface, with the free energy evolution going completely downhill. In addition, proton adsorption was found to be extremely weak on the In3Sn(100) surface, suppressing the parasitic hydrogen evolution reaction. The high activity and inhibition of the competing reaction contribute to the excellent performance of these p-block metal-based catalysts in NRA.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Ping Cheng, Xiaohan Wang, Josua Markus, Md Abdul Wahab, Silvia Chowdhury, Ruijing Xin, Saad M. Alshehri, Yoshio Bando, Yusuke Yamauchi, Yusuf Valentino Kaneti
Summary: This work introduces coordinated water into Ni-BTC nanorods, resulting in their transformation to Ni-BTC nanofibres. The carbonization of the NiBTC nanofibres at 600 degrees C leads to the formation of carbon nanotube-decorated porous nickel/carbon hybrid with enlarged pores. The Ni/C-600 hybrid exhibits higher adsorption capacity and better recyclability compared to the original Ni-BTC nanorods.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Chao Zhang, Anastasia V. Korovina, Konstantin L. Firestein, Joseph F. S. Fernando, Courtney-Elyce Lewis, Dmitry G. Kvashnin, Dmitri V. Golberg
Summary: The optoelectronic properties of free-standing few-atomic-layer black phosphorus nanoflakes are analyzed using in situ transmission electron microscopy (TEM). The band gap of black phosphorus (BP) is directly related to its thickness and strain, and can be tuned accordingly. Photocurrent measurements under TEM reveal stable response to infrared light and changes in band gap with deformation. Experimental results are further supported by density functional theory (DFT) calculations. These findings provide guidance for engineering the band gap of BP through controlling the number of atomic layers and programmed deformations for future optoelectronic applications.
Article
Chemistry, Multidisciplinary
Linh Duy Thai, Thiago R. Guimaraes, Lewis C. Chambers, Jochen A. Kammerer, Dmitri Golberg, Hatice Mutlu, Christopher Barner-Kowollik
Summary: This study investigates the impact of macromolecular architecture on the isomerization efficiency of main-chain-incorporated chromophores in both solution and solid state. It is found that branched architectures deliver the highest isomerization efficiency in the solid state, reaching up to 70% compared to solution. The macromolecular design principles established in this study can serve as a blueprint for enhancing the solid-state isomerization efficiency in other polymer systems.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Bailey J. Richardson, Chao Zhang, Pascal Rauthe, Andreas-Neil Unterreiner, Dmitri V. Golberg, Berwyck L. J. Poad, Hendrik Frisch
Summary: By exploiting self-assembled environments, inefficient reactions can be transformed into highly efficient reactions, leading to an expansion of the toolbox for bioorthogonal chemistry. Through the incorporation of peptide sequences, the assembly of structures with both hydrophilic and hydrophobic regions enables a highly efficient photoligation reaction within a defined local environment. The reversible morphology change allows for the control of the photoligation reaction, by switching it on or off simply by adjusting the pH.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Inorganic & Nuclear
Hanqing Yin, Stuart Bell, Dmitri Golberg, Aijun Du
Summary: Currently, the Haber-Bosch (HB) process dominates artificial ammonia synthesis. However, concerns over energy consumption and air pollution have led to a growing demand for economical and eco-friendly approaches like electrocatalysis. Through density functional theory calculations, we investigated bimetallic alloys of iron and group-IVA elements for their potential in electrochemical nitrogen reduction reaction (e-N2RR). Our findings showed that alloying iron with group-IVA elements can significantly enhance the e-N2RR activity, with an optimal Fe-Si ratio of 3:1 yielding a theoretical overpotential of only 0.21 V, one of the best results observed. Our work proposes a rational design for practical and economical e-N2RR electrocatalysts, as many of the bimetallic alloys studied have already been synthesized.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Physical
Denis V. Leybo, Anastasia A. Ryzhova, Andrei T. Matveev, Konstantin L. Firestein, Pavel A. Tarakanov, Anton S. Konopatsky, Alexander L. Trigub, Ekaterina V. Sukhanova, Zakhar I. Popov, Dmitri V. Golberg, Dmitry V. Shtansky
Summary: Iron phthalocyanine-coated hexagonal boron nitride nanoparticles were heat treated to form single atom Fe-1/h-BN catalysts. The deposition process of FePc was optimized to avoid nanoparticle formation. The FePc exhibits high thermal stability and decomposes into single iron atoms under oxidizing conditions. Reduction treatment results in the formation of Fe-based nanoparticles and a decrease in catalytic activity. The results demonstrate the potential of metal phthalocyanine as a precursor for cheap and efficient single atom catalysts for CO2 hydrogenation.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Lian-Mao Peng
Summary: Semiconducting single-walled carbon nanotubes (CNTs) have ideal properties for constructing transistors, surpassing the limits of silicon. CNT technology also enables the development of large-area and flexible electronic applications, and low-temperature processing allows for monolithic 3D integration of logic and memory devices.
Article
Chemistry, Physical
Hang Yin, Zhehao Sun, Kaili Liu, Ary Anggara Wibowo, Julien Langley, Chao Zhang, Sandra E. Saji, Felipe Kremer, Dmitri Golberg, Hieu T. Nguyen, Nicholas Cox, Zongyou Yin
Summary: This study reveals the synergy between defection sites on catalyst surfaces and hard metal nanoparticles, and their importance in enhancing photocatalytic activity and maintaining selectivity.
NANOSCALE HORIZONS
(2023)
