Article
Nanoscience & Nanotechnology
Chen Su, Mingyu Li, Yongfeng Zhang, Tianqing Liu, Cong Ren, Peipei Li, Xiaoqiang Yin, Lu Zhang, Min Zhang, Weiwei Wu
Summary: In this study, a hierarchical CuO/Co3O4 nanowire heterostructure was synthesized using a feasible hydrothermal technique, and a high-performance gas sensor with strong response to ethylene glycol was developed.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Baobing Zhang, Fenglong Shang, Xiaofeng Shi, Ryan Yao, Fengxia Wei, Xiaoya Hou, Wanli Li, Jie Zhang
Summary: In this study, flexible hydrogen sulfide gas sensors based on PANI/CuO nanocomposites were investigated for ambient use. The sensors showed high performances in terms of sensitivity, responsiveness, linearity, stability, and selectivity. The results suggest that these sensors have the potential to be used in monitoring fresh food quality and ensuring environmental safety.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Dawoon Jung, Sehoon Hwang, Hyun-Jong Kim, Jae-Hee Han, Ho-Nyun Lee
Summary: Various porous CuO films were manufactured using a thermal evaporator and utilized as gas sensors for H2S detection. The results demonstrated that the porosity of the films had a significant effect on the performance of the sensors.
Article
Chemistry, Analytical
Myung Sik Choi, Ali Mirzaei, Han Gil Na, Sangwoo Kim, Dong Eung Kim, Kyu Hyoung Lee, Changhyun Jin, Sun-Woo Choi
Summary: This study proposed a method to enhance the gas sensing properties of metal oxide nanowires by preparing Pd metal catalyst surrounded by SnO2-x with structural defects on the surface of SnO2 nanowires. Gas sensing studies demonstrated the promising effects of this approach, showing the usefulness of significantly enhancing the gas sensing properties.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Ru Lin, Qi Hu, Zuolian Liu, Shusheng Pan, Zhifeng Chen, Wei Zhang, Zhiyu Liu, Shaolin Zhang, Chengyun Zhang
Summary: This study explores the fabrication of a room-temperature CuO/Pd hydrogen sensor by inducing randomly distributed nanospike structures on a silicon substrate using a femtosecond laser. The sensor exhibits promising detection capability to hydrogen gas, with a high sensitivity, fast response time, and low detection limit. The sensor also demonstrates excellent reusability and selectivity towards H-2 at room temperature, making it suitable for future integration into circuit-chip hydrogen sensors.
Article
Chemistry, Analytical
Phan Hong Phuoc, Nguyen Ngoc Viet, Nguyen Viet Chien, Nguyen Van Hoang, Chu Manh Hung, Nguyen Duc Hoa, Nguyen Van Duy, Hoang Si Hong, Do Dang Trung, Nguyen Van Hieu
Summary: In this study, the influence of internal and external junctions within nanofibers on gas sensing characteristics was compared by synthesizing CuO-Co3O4 composite and CuO/Co3O4 mixed nanofibers. The gas sensing properties of different sensors based on nanofibers were investigated, and it was found that both internal and external junctions affected the gas sensing performance.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Kyeorei Lim, Young-Moo Jo, Seonghwan Kim, Ji-Wook Yoon, Seong-Yong Jeong, Jun-Sik Kim, Hun Ji Choi, Youngkyu Cho, Jangpyo Park, Yong Won Jeong, Jong-Heun Lee
Summary: The study developed a nanopattern chemiresistor consisting of aligned CuO-loaded CuFe2O4 nanofibers via direct-write near-field electrospinning. The CuO/CuFe2O4 sensor showed high responses to ppm-level H2S and MM, attributed to the gas-accessible morphology, formation of a nanoscale p(CuO)-n(CuFe2O4) junction, and intimate reaction between CuO nanoparticles and VSCs. Additionally, the sensor exhibited selectivities to H2S and MM at different temperatures, enabling dual detection and providing new possibilities for indoor air quality monitoring, ventilation control, halitosis diagnosis, and wine quality monitoring.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Wangchang Geng, Zhiyan Ma, Jianhua Yang, Libing Duan, Feng Li, Qiuyu Zhang
Summary: Mesoporous CuO materials with adjustable pore size and high specific surface area were successfully synthesized by a simple and economical one-pot hydrothermal method. The optimal gas-sensing performance was achieved with a film thickness of about 71μm, while mesoporous CuO materials with higher specific surface area and suitable pore size distribution showed enhanced acetic acid sensing performance.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Zhicheng Cai, Sunghoon Park
Summary: The study synthesized porous-structured Pd-decorated In2O3 nanoparticle-embedded SnO2 nanofibers, which showed a 24-times enhancement in sensing performance for 100 ppm hydrogen gas compared to Pd-decorated SnO2 nanofibers.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Ting-Jen Hsueh, Song-Sing Wu
Summary: This study successfully produced Co3O4 nanoparticles and developed an Au/Co3O4-NPs/MEMS NO2 gas sensor with high sensitivity to NO2 gas. Experimental results showed that the sensor had the greatest response to a 100-ppb NO2 gas concentration at the optimal operating temperature.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Daria I. Markina, Sergey S. Anoshkin, Mikhail A. Masharin, Soslan A. Khubezhov, Ivan Tzibizov, Dmitriy Dolgintsev, Ivan N. Terterov, Sergey V. Makarov, Anatoly P. Pushkarev
Summary: Detection of hazardous volatile organic and inorganic species, such as hydrogen halides (HX, X = Cl, Br, I), is crucial in ensuring human safety in the chemical industry. In this study, a cost-effective and highly sensitive detector was developed for optical detection of hydrogen chloride gas using solution-processed halide perovskite nanowire lasers. An anion exchange reaction between CsPbBr3 nanowires and vaporized HCl molecules led to the formation of a structure with a bromide core and a thin mixed-halide CsPb(Cl,Br)3 shell, which resulted in an increase in laser frequency. The optical response allowed for the detection of HCl molecules in the range of 5-500 ppm.
Article
Materials Science, Multidisciplinary
Swapnali B. Dhage, Vithoba L. Patil, Pramod S. Patil, Jungho Ryu, Deepak R. Patil, Yuvraj S. Malghe
Summary: CuO-SnO2 nanocomposites were successfully synthesized and studied for their potential as CO gas sensors. The thermal stability and gas sensitivity of the nanocomposites were confirmed, showing excellent repeatability and sensitivity towards CO gas. The XRD results indicated pure phase formation of CuO-SnO2 heterostructure with a band-gap of 2.63 eV.
Article
Chemistry, Physical
Tiantian Dai, Zanhong Deng, Xiaodong Fang, Huadong Lu, Yong He, Junqing Chang, Shimao Wang, Nengwei Zhu, Liang Li, Gang Meng
Summary: By controlling the use of shadow masks and the thickness of the copper film, the position and spacing of CuO microhemisphere nanowires can be well controlled, allowing for bridging of adjacent nanowires and benefiting highly sensitive TMA sensors and broad band photodetectors. The electrical response of 3.62 to 100 ppm TMA is comparable to state-of-the-art CuO-based sensors, suggesting promising commercial device applications of CuO nanowires through in situ assembly of RB-MNAs device arrays using common lithographic technologies.
Article
Chemistry, Analytical
Guillem Domenech-Gil, Jordi Sama, Cristian Fabrega, Isabel Gracia, Carles Cane, Sven Barth, Albert Romano-Rodriguez
Summary: We present a methodology for localized growth of nanowires on micro-hotplates that allows independent adjustment of the device's resistance and gas response. Fabrication of nanowire-containing stripes with or without gaps enables nanowires to bridge current, and we demonstrate this approach with SnO2 nanowire-based chemoresistors. The results show the capability of tailoring nanowire stripe sizes and empty areas along the sensing material, resulting in up to 500 times response increase. The absence of nucleation seeds in the gap areas restricts current flow along the nanowire bridges, enhancing surface conduction controlled by nanowire-gas interaction.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Haoyu Zhang, Tingting Zhao, Wenhuan Zhu, Lingwei Kong, Yizhong Huang, Hai Liu
Summary: This paper reports a novel ionization gas sensor assembled by CuO nanowires coated with a thin layer of aluminum. The sensor can discharge volatile organic compounds at ppm level at an ultralow ionization voltage with high stability. It can identify typical organic gases and detect the concentration of isopropanol gas as low as 5 ppm.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Optics
Galan Moody, Volker J. Sorger, Daniel J. Blumenthal, Paul W. Juodawlkis, William Loh, Cheryl Sorace-Agaskar, Alex E. Jones, Krishna C. Balram, Jonathan C. F. Matthews, Anthony Laing, Marcelo Davanco, Lin Chang, John E. Bowers, Niels Quack, Christophe Galland, Igor Aharonovich, Martin A. Wolff, Carsten Schuck, Neil Sinclair, Marko Loncar, Tin Komljenovic, David Weld, Shayan Mookherjea, Sonia Buckley, Marina Radulaski, Stephan Reitzenstein, Benjamin Pingault, Bartholomeus Machielse, Debsuvra Mukhopadhyay, Alexey Akimov, Aleksei Zheltikov, Girish S. Agarwal, Kartik Srinivasan, Juanjuan Lu, Hong X. Tang, Wentao Jiang, Timothy P. McKenna, Amir H. Safavi-Naeini, Stephan Steinhauer, Ali W. Elshaari, Val Zwiller, Paul S. Davids, Nicholas Martinez, Michael Gehl, John Chiaverini, Karan K. Mehta, Jacquiline Romero, Navin B. Lingaraju, Andrew M. Weiner, Daniel Peace, Robert Cernansky, Mirko Lobino, Eleni Diamanti, Luis Trigo Vidarte, Ryan M. Camacho
Summary: Integrated photonics is crucial for the large-scale integration of quantum systems, enabling programmable quantum information processing, chip-to-chip networking, hybrid quantum system integration, and high-speed communications.
JOURNAL OF PHYSICS-PHOTONICS
(2022)
Article
Optics
Jin Chang, Johannes W. N. Los, Ronan Gourgues, Stephan Steinhauer, S. N. Dorenbos, Silvania F. Pereira, H. Paul Urbach, Val Zwiller, Iman Esmaeil Zadeh
Summary: Superconducting nanowire single-photon detectors (SNSPDs) have become the leading technology for quantum light detection. This study presents a new approach using SNSPDs made from NbTiN superconducting films, which achieve high system detection efficiency and sub-15 ps timing jitter in the mid-infrared range. The detectors also demonstrated unity internal detection efficiency at 3 μm and 80% internal efficiency at 4 μm, paving the way for efficient mid-infrared single-photon detection without the need for milliKelvin cooling.
PHOTONICS RESEARCH
(2022)
Correction
Chemistry, Multidisciplinary
Thomas Lettner, Samuel Gyger, Katharina D. Zeuner, Lucas Schweickert, Stephan Steinhauer, Carl Reuterskiold Hedlund, Sandra Stroj, Armando Rastelli, Mattias Hammar, Rinaldo Trotta, Klaus D. Jons, Val Zwiller
Article
Nanoscience & Nanotechnology
Yun Meng, Kai Zou, Nan Hu, Liang Xu, Xiaojian Lan, Stephan Steinhauer, Samuel Gyger, Val Zwiller, Xiaolong Hu
Summary: Superconducting nanowire single-photon detectors (SNSPDs) with high system detection efficiency and excellent timing resolution play a significant role in various photon applications. However, the existing design is sensitive to the polarization states of incident photons, which is unfavorable for photon-starved applications. By introducing an arced fractal geometry, we successfully eliminate the dependence on polarization and experimentally demonstrate high efficiency and resolution.
Article
Optics
Nan Hu, Yun Meng, Kai Zou, Yifan Feng, Zifan Hao, Stephan Steinhauer, Samuel Gyger, Val Zwiller, Xiaolong Hu
Summary: Measuring the states of polarization of light is crucial for various applications, and while conventional detectors cannot resolve the polarization, our research presents a complete polarimetric measurement system that achieves high sensitivity and accurate results, with the additional application of remote polarimetric imaging.
Article
Physics, Applied
Mattias Jonsson, Robert Vedin, Samuel Gyger, James A. Sutton, Stephan Steinhauer, Val Zwiller, Mats Wallin, Jack Lidmar
Summary: This study investigates the current-crowding effect in superconductors and proposes a meander design that can combine high fill factor and low current crowding.
PHYSICAL REVIEW APPLIED
(2022)
Article
Optics
Thomas Hummel, Alex Widhalm, Jan Philipp Hopker, Klaus D. Jons, Jin Chang, Andreas Fognini, Stephan Steinhauer, Val Zwiller, Artur Zrenner, Tim J. Bartley
Summary: Superconducting nanowire single-photon detectors (SNSPDs) have high efficiency, low dark count rate, and short recovery time. Gating the SNSPD allows for active de-latching and temporal filtering, expanding its applications. The rise time of the gating depends on the inductance of the detector and control electronics, and the gate window can be freely tuned up to 500 ns. The gated operation demonstrated an increased photon counting dynamic range and temporal filtering capabilities.
Article
Optics
Kai Zou, Zifan Hao, Yifan Feng, Yun Meng, Nan Hu, Stephan Steinhauer, Samuel Gyger, Val Zwiller, Xiaolong Hu
Summary: We present a fiber-coupled fractal superconducting nanowire single-photon detector (SNSPD) system with minimal polarization dependence in detection efficiency. The system detection efficiency (SDE) was maximized at 1540 nm wavelength, with a measured value of 91 +/- 4%; moreover, we observed a second local maximum of SDE at 520 nm wavelength, with a measured value of 61 +/- 2%. This dual-band feature is attributed to the enhancement of optical absorptance by two longitudinal resonance modes of the micro-cavity. By utilizing high SDE with minimal polarization dependence in these two bands, we successfully implemented a hybrid LIDAR for imaging remote objects in free space and underwater.
Review
Chemistry, Physical
Panagiotis Grammatikopoulos, Theodoros Bouloumis, Stephan Steinhauer
Summary: This article provides an overview of recent advances in nanoparticle growth experiments via gas-phase synthesis, specifically magnetron-sputtering inert-gas condensation. It discusses the applications of gas-phase synthesized nanoparticles in energy, catalysis, sensing, and neuromorphic devices for unconventional computing. The challenges and limiting factors are identified, and potential solutions involving advances in nanoparticle source instrumentation and in situ diagnostics are outlined. The article concludes by suggesting the most promising and impactful applications of gas-phase synthesized nanoparticles in the future.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Jun Gao, Leonardo Santos, Govind Krishna, Ze-Sheng Xu, Adrian Iovan, Stephan Steinhauer, Otfried Guhne, Philip J. Poole, Dan Dalacu, Val Zwiller, Ali W. Elshaari
Summary: In this study, an eight-mode on-demand single-photon W state is generated using nanowire quantum dots and a silicon nitride photonic chip. The W state is reconstructed in photonic circuits using Fourier and real-space imaging, supported by the Gerchberg-Saxton phase retrieval algorithm. The entangled nature of the generated state is confirmed by utilizing an entanglement witness. This study provides a new imaging approach for assessing multipartite entanglement in W states, contributing to the progress in image processing and Fourier-space analysis techniques for complex quantum systems.
Article
Chemistry, Multidisciplinary
Alessandro Prencipe, Samuel Gyger, Mohammad Amin Baghban, Julien Zichi, Katharina D. Zeuner, Thomas Lettner, Lucas Schweickert, Stephan Steinhauer, Ali W. Elshaari, Katia Gallo, Val Zwiller
Summary: This study reports on the implementation of superconducting nanowire single-photon detectors on thin film lithium niobate ridge nano-waveguides, which shows great potential for on-chip quantum optics experiments.
Article
Materials Science, Multidisciplinary
Vidya Alman, V. V. Ramakrishna, Sai Vittal Battula, B. N. Sahu, Anil Annadi, Vidyadhar Singh, Murtaza Bohra
Summary: From multicomponent high-entropy alloys (AlCoCrFeNi) to ternary alloys (CrFeNi) and binary alloys (NiCr), Cr doping plays a crucial role in modifying the magnetocaloric properties of the resulting alloys. The magnetocaloric effect (MCE) of Ni100-xCrx (x = 5, 10, 15 at.%) nanogranular thin films was investigated by varying the concentration of Cr, showing near room-temperature magnetic entropy change (- delta S-M = 0.08 J/kg K) and relative cooling power (RCP = 25 J/kg) at 10 at.% Cr. The MCE properties can be well predicted using a phenomenological model based on magnetization as a function of temperature, showing good correlation with experimentally measured magnetic isotherms.
MRS COMMUNICATIONS
(2023)
Proceedings Paper
Optics
Matteo Cherchi, Emma Mykkanen, Antti Kemppinen, Kirsi Tappura, Joonas Govenius, Mika Prunnila, Giovanni Delrosso, Teemu Hakkarainen, Jukka Viheriala, Mario Castaneda, Mark Bieler, Stephan Steinhauer, Val Zwiller, Stefan M. Koepfli, Juerg Leuthold, Eva De Leo
Summary: Photonic integration technologies play a crucial role in scaling up superconducting quantum computers. Suitable classical optical links are identified to control and read out qubits in cryostats and address the power dissipation issue in superconducting computing platforms. Recent results and future solutions are presented.
2022 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC)
(2022)
Article
Physics, Multidisciplinary
Jun Gao, Ze-Sheng Xu, Daria A. Smirnova, Daniel Leykam, Samuel Gyger, Wen-Hao Zhou, Stephan Steinhauer, Val Zwiller, Ali W. Elshaari
Summary: This paper investigates the topological Anderson phase in disordered systems and experimentally verifies the emergence of protected edge states when disorder is added. It also presents a single-shot measurement technique for studying the light dynamics in nanophotonic systems.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Joshua C. Bienfang, Val Zwiller, Stephan Steinhauer
Summary: This article focuses on materials challenges in single-photon detectors and reviews recent progress. In particular, SPADs and SNSPDs have shown excellent performance in high-count-rate single-photon counting. The article also discusses device configurations specifically designed for high-speed optoelectronics and compares the advantages and tradeoffs of different device technologies.
