The developments in carbon-modified graphitic carbon nitride for photoelectrochemical water splitting: a mini review
Graphitic carbon nitride (g-CN), as a potential photoelectrode for photoelectrochemical water splitting, has garnered significant research attention owing to its favorable attributes, including a suitable bandgap, abundant elemental composition, excellent thermal stability, and non-toxicity. However, the limited efficiency of visible light absorption and poor electrical conductivity of pure g-CN result in low photocurrent density and photocatalytic activity, falling short of meeting th
Yuewen Yang, Tingrui Xu & Ruiqin Zhang
Surface and bulk acoustic wave resonators based on aluminum nitride for bandpass filters
Bandpass filters with high frequency and wide bandwidth are indispensable parts of the fifth-generation telecommunication technologies, and currently, they are mainly based on surface and bulk acoustic wave resonators. Owing to its high mechanical strength, excellent stability at elevated temperatures, good thermal conductivity, and compatibility with complementary metal-oxide-semiconductor technology, aluminum nitride (AlN) becomes the primary piezoelectric material for high-frequency
Xian-Hu Zha, Jing-Ting Luo, Ran Tao & Chen Fu
A newly developed Cu(Rh) alloy film and its characteristics and applications
A new type of copper (Cu)-rhodium (Rh)-alloy, Cu(Rh), films is developed by co-sputtering copper and rhodium onto silicon (Si) substrates under an argon (Ar) atmosphere. The new films are next annealed at 600 and 670 °C, or alternatively at 100 and 450 °C, for 1 h. Longer annealing to the films, for up to 8 days, is also conducted to explore resistivity variation. The resistivity of the new 300-nm-thick film is 2.19 μΩ cm after annealing at 670 °C for 1 h and drifts to 2.26 and 2.14 μΩ
Chon-Hsin Lin
A quantum algorithm for linear differential equations with layerwise parameterized quantum circuits
Solving linear differential equations is a common problem in almost all fields of science and engineering. Here, we present a variational algorithm with shallow circuits for solving such a problem: given an \(N \times N\) matrix \({\boldsymbol{A}}\), an N-dimensional vector \(\boldsymbol{b}\), and an initial vector \(\boldsymbol{x}(0)\), how to obtain the solution vector \(\boldsymbol{x}(T)\) at time T according to the constraint \(\textrm{d}\boldsymbol{x}(t)/\textrm{d} t = {\boldsymbo
Junxiang Xiao, Jingwei Wen, Zengrong Zhou, Ling Qian, Zhiguo Huang, Shijie Wei & Guilu Long
The study of angular distance distribution to the solar flares during different solar cycles
The angular distance of the solar flares to the projective point of the center of the solar disk on the solar spherical surface has been studied by the heliographical or helioprojective coordinates, during the periods 1975–2021 for GOES events and 2002–2021 for RHESSI events, hereafter “distance.” It gives a specific distribution curvature. It has also been noted that when using the number of solar flare events in each satellite, GOES or RHESSI, or even using the sum of the flux (class
Ramy Mawad
Intersections of ultracold atomic polarons and nuclear clusters: how is a chart of nuclides modified in dilute neutron matter?
Neutron star observations, as well as experiments on neutron-rich nuclei, used to motivate one to look at degenerate nuclear matter from its extreme, namely, pure neutron matter. As an important next step, impurities and clusters in dilute neutron matter have attracted special attention. In this paper, we review in-medium properties of these objects on the basis of the physics of polarons, which have been recently realized in ultracold atomic experiments. We discuss how such atomic and
Hiroyuki Tajima, Hajime Moriya, Wataru Horiuchi, Eiji Nakano & Kei Iida
Density-based Reactivity Theory Applied to Excited States
Excited states are essential to many chemical processes in photosynthesis, solar cells, light-emitting diodes, and so on, yet how to formulate, quantify, and predict physiochemical properties for excited states from the theoretical perspective is far from being established. In this work, we leverage the four density-based frameworks from density functional theory (DFT) including orbital-free DFT, conceptual DFT, information-theoretic approach and direct use of density associated descri
Xiaoyan An, Wenbiao Zhang, Xin He, Meng Li, Chunying Rong & Shubin Liu
Studies on electromagnetic dipole responses of atomic nuclei at RCNP
Electric dipole (E1) and spin-magnetic dipole (spin-M1) responses of nuclei have been studied by proton inelastic scattering experiments at forward angles, including zero degrees, at the Research Center for Nuclear Physics (RCNP) by employing a proton beam 295 or 392 MeV and the high-resolution magnetic spectrometer Grand Raiden. The E1 response of nuclei is the most fundamental nuclear response to the external field and is relevant to photo-nuclear reactions. After introducing the rel
Atsushi Tamii & Nobuyuki Kobayashi
STM studies for surface-mounted molecular rotors: a mini review
A molecular rotor is a molecule/molecular system that performs rotary motions under an external stimulus. Molecular rotors are promising for applications in medicine, optical usage, information science, etc. A molecular rotor is also a crucial component in constructing more sophisticated functional molecular machines. Anchoring molecular rotors on surfaces is regarded as a feasible way of building functional molecular rotor systems. Scanning tunneling microscope (STM) is a powerful too
Tianyi Yang & Ruiqin Zhang
The two-body strong decays of the fully-charm tetraquark states
We study the hadronic coupling constants in the two-body strong decays of the fully-charm tetraquark states with the \(J^{PC}=0^{++}\), \(1^{+-}\), and \(2^{++}\) via the QCD sum rules based on rigorous quark-hadron duality. Then we obtain the hadronic coupling constants and partial decay widths therefore total decay widths, which support assigning the X(6552) as the first radial excitation of the scalar tetraquark state. And other predictions can be used to diagnose exotic states in t
Zhi-Gang Wang & Xiao-Song Yang