Article
Physics, Applied
A. Kachwala, O. Chubenko, D. Kim, E. I. Simakov, S. Karkare
Summary: This study measured the quantum efficiency, photoemission energy spectra, and mean transverse energy of the (N)UNCD photocathode. It was found that the quantum efficiency was comparable to copper photocathodes, but scattering affected the spectra and mean transverse energy. The mean transverse energy was limited by the physical and chemical roughness of the (N)UNCD photocathode.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Shradha Suman, Dhananjay K. Sharma, Sourav Sain, Ondrej Szabo, Salila K. Sethy, Benadict Rakesh, Umapathi Balaji, Marian Marton, Marian Vojs, Susanta S. Roy, Ramasamy Sakthivel, Kamatchi Jothiramalingam Sankaran, Alexander Kromka
Summary: Vertically aligned boron-doped diamond nanostructures fabricated by reactive ion etching exhibit excellent electrical conductivity and improved characteristics for plasma illumination devices.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yuting Zheng, Yanhui Liu, Lin Wang, Jinlong Liu, Junjun Wei, Liangxian Chen, Kang An, Xiaotong Zhang, Haitao Ye, Haojun Zhou, Hongliang Tao, Yuhang Yin, Xiaoping Ouyang, Chengming Li
Summary: The performance of boron-doped diamond hollow nanoneedle array was enhanced through surface state modulation. By controlling the surface roughness and boron concentration, a uniform and dense nanoneedle array was constructed. After hydrogen plasma treatment, the nanoneedle array showed excellent field emission stability and desirable current density.
ACS APPLIED NANO MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Chengke Chen, Binjie Tang, Hui Xu, Jinping Pan, Meiyan Jiang, Xiao Li, Xiaojun Hu
Summary: In this study, a low-pressure annealing treatment was used to enhance the EFE properties of UNCD films without doping. The improved EFE current densities were attributed to the refinement of diamond grains and the formation of a conductive network.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Shuo Sun, Feng Xu, Lili Shi, Shengji Zhou, Yanchao Zhao, Chengzuan Gao, Dunwen Zuo
Summary: This paper prepares two types of diamond cone array tools (DCATs) for precision processing by etching free-standing diamond (FSD) and microcrystalline diamond (MCD) films using double-bias assisted hot filament chemical vapor deposition (HFCVD). The performance of the newly developed free-standing diamond cone array tool (FSD-CAT) and microcrystalline diamond cone array tool (MCD-CAT) is evaluated by performing lapping experiments on monocrystalline silicon. The results show that DCATs can effectively reduce the surface roughness of silicon, with a surface roughness as low as 5 nm achieved by using a combination of both DCATs.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Xin Chen, Markus Mohr, Kai Bruehne, Hans-Joerg Fecht
Summary: The high electrical conductivity of over 100 S/cm was achieved in nanocrystalline diamond films deposited on silicon single-crystalline substrates by using a methane and hydrogen process gas mixture in an appropriate hot-filament CVD process without further dopant. Oxygen reactive-ion etching process was found to improve the diamond film surface's electron affinity, leading to a reduction in specific contact resistance. The mechanism behind the contact resistance reduction was explained qualitatively in terms of the electron affinity of the diamond surface, confirmed through XPS, AFM, and surface wetting measurements.
Article
Nanoscience & Nanotechnology
A. Nardi, M. Turchetti, W. A. Britton, Y. Chen, Y. Yang, L. Dal Negro, K. K. Berggren, P. D. Keathley
Summary: The research discusses the development of a fabrication process for producing nanostructures with engineered gaps, allowing for the creation of large-scale arrays of electrically-connected bow-tie nanoantennas. The tests showed sub-10 V tunneling operation and high quantum efficiency, demonstrating the potential for the next generation of CMOS-compatible nanoscale devices for high-speed and low-power field-emission electronics and optoelectronics applications, with minimal degradation over time.
Article
Physics, Applied
Xiaoqin Ma, Lichi Chen, Yaogong Wang, Wenjiang Wang, Xiaoning Zhang
Summary: This study investigates the influence of SiNWs morphology on microplasma emission performances. The results show that SiNWs prepared at a suitable etching current can provide optimal field emission properties and microplasma emission performances, which is significant for the application of SiNWs in microdischarge devices.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Lei Huang, Shungo Harajiri, Shaoqing Wang, Xiangqing Wu, Kungen Teii
Summary: By decorating carbon nanowalls with diamond particles, field emission efficiency and stability can be enhanced, along with a significant increase in current density.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Salila Kumar Sethy, Mateusz Ficek, Kamatchi Jothiramalingam Sankaran, Sourav Sain, Anupam Ruturaj Tripathy, Shivam Gupta, Jacek Ryl, Susanta Sinha Roy, Nyan-Hwa Tai, Robert Bogdanowicz
Summary: The origin of nitrogen-incorporated boron-doped nanocrystalline diamond (NB-NCD) nanowires is systematically addressed in relation to substrate temperature in reactant gases. The morphology and properties of NB-NCD films are significantly affected by the substrate temperature, with films grown at different temperatures showing different structural characteristics. Optical emission spectroscopy studies reveal the main factors contributing to the formation of nanowire-like conducting diamond grains and graphitic phases at grain boundaries. Conductive atomic force microscopy studies show that boron doping and nitrogen incorporation play crucial roles in improving electrical conductivity and generating conducting channels in the NB-NCD films, particularly in films grown at 850 degrees Celsius.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Physics, Applied
Kamatchi Jothiramalingam Sankaran, Joji Kurian, Balakrishnan Sundaravel, I-Nan Lin, Ken Haenen
Summary: This study focuses on the enhancement of electrical conductivity and field electron emission properties of ultrananocrystalline diamond films via gold ion implantation, and the comparison of characteristics of different implanted species. Additionally, the use of a thin gold coating on silicon substrates covered by diamond films is discussed for improved emission characteristics.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Anton V. Golovanov, Nikolay V. Luparev, Sergey Yu. Troschiev, Sergei A. Tarelkin, Viktoriia S. Shcherbakova, Vitaly S. Bormashov
Summary: Surface modification of diamond is crucial for the creation of diamond quantum photonics devices. Research shows that using SF6-based plasma for diamond processing can etch diamond faster than traditional methods, and a two-step plasma processing method can produce steep diamond 3D structures suitable for nanophotonics without the need for chlorine.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Article
Electrochemistry
Jing Zhang, Zhi-yan Zhao, Zhi-qiang Zhang, Jing-xuan Pei, Xiang Yu, Yannick Coffinier, Sabine Szunerits, Rabah Boukherroub, Cheng-wu Yang
Summary: A free-standing nanostructured boron-doped diamond (BDD) electrode was fabricated through reactive ion etching (RIE) with oxygen plasma, resulting in high specific capacitance and good stability. It demonstrated excellent performance in terms of capacitance and energy density.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Doo San Kim, Yun Jong Jang, Ye Eun Kim, Hong Seong Gil, Hee Ju Kim, You Jin Ji, Hyung Yong Kim, In Ho Kim, Myoung Kwan Chae, Jong Chul Park, Geun Young Yeom
Summary: In this study, a dual exhaust system was implemented in a reactive ion beam etcher (RIBE) to control the radical flux relative to ion flux during the etching process. The additional exhausting of radicals through the inductively coupled plasma (ICP) source chamber decreased both the ICP source chamber pressure and the ratio of radical flux to ion flux. This control of the radical flux is believed to be beneficial for anisotropic etching of nanoscale features in the next generation RIBE.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Anima Mahajan, Nausad Khan, Krishna K. Yadav, Menaka Jha, Santanu Ghosh
Summary: In this study, LaS2 ultrafine nanostructures were successfully synthesized using anisotropic nanostructures of La(OH)(3), which have applications in display devices, optoelectronics, field emission, and thermoelectric devices due to their low work function and excellent chemical and physical properties. Anisotropic La(OH)(3) was synthesized by the micellar-assisted hydrothermal route and then reacted with elemental sulfur at ambient pressure to obtain stable LaS2 nanoparticles with a size of about 25 nm. The obtained lanthanum disulfide was used to make LaS2 ink and spin-coated onto a silicon substrate to fabricate a LaS2 film. The field emission study of the LaS2 film showed the lowest turn-on field (<3.9 V/mu m), a high field enhancement factor (beta = 14,594), and a high current density of 7.15 mu A/cm(2), which is about 10 times higher than previous reports.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
S. Deshmukh, K. J. Sankaran, K. Srinivasu, S. Korneychuk, D. Banerjee, A. Barman, G. Bhattacharya, D. M. Phase, M. Gupta, J. Verbeeck, K. C. Leou, I. N. Lin, K. Haenen, S. S. Roy
DIAMOND AND RELATED MATERIALS
(2018)
Article
Chemistry, Multidisciplinary
Kamatchi Jothiramalingam Sankaran, Mateusz Ficek, Srinivasu Kunuku, Kalpataru Panda, Chien-Jui Yeh, Jeong Young Park, Miroslaw Sawczak, Pawel Piotr Michalowski, Keh-Chyang Leou, Robert Bogdanowicz, I-Nan Lin, Ken Haenen
Article
Multidisciplinary Sciences
Bo-Rong Lin, Srinivasu Kunuku, Chien-Hsu Chen, Tzung-Yuang Chen, Tung-Yuan Hsiao, Hung-Kai Yu, Yu-Jen Chang, Li-Chuan Liao, Huan Niu, Chien-Ping Lee
SCIENTIFIC REPORTS
(2019)
Article
Physics, Applied
Srinivasu Kunuku, Chien-Hsu Chen, Ping-Yen Hsieh, Bo-Rong Lin, Nyan-Hwa Tai, Huan Niu
APPLIED PHYSICS LETTERS
(2019)
Article
Physics, Applied
Bo-Rong Lin, Srinivasu Kunuku, Tzung-Yuang Chen, Yu-Jen Chang, Li-Chuan Liao, Chien-Hsu Chen, Tung-Yuan Hsiao, Hung-Kai Yu, Huan Niu, Chien-Ping Lee
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2019)
Article
Nanoscience & Nanotechnology
Kamatchi Jothiramalingam Sankaran, Chien-Jui Yeh, Ping-Yen Hsieh, Paulius Pobedinskas, Srinivasu Kunuku, Keh-Chyang Leou, Nyan-Hwa Tai, I-Nan Lin, Ken Haenen
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Physics, Applied
Bo-Rong Lin, Chien-Hsu Chen, Chun-Hsiang Chang, Srinivasu Kunuku, Tzung-Yuang Chen, Tung-Yuan Hsiao, Hung-Kai Yu, Yu-Jen Chang, Li-Chuan Liao, Fang-Hsin Chen, Huan Niu, Chien-Ping Lee
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2019)
Article
Physics, Applied
Bo-Rong Lin, Chiung-Chi Wang, Chien-Hsu Chen, Srinivasu Kunuku, Tung-Yuan Hsiao, Hung-Kai Yu, Tzung-Yuang Chen, Yu-Jen Chang, Li-Chuan Liao, Chun-Hsiang Chang, Fang-Hsin Chen, Huan Niu, Chien-Ping Lee
JOURNAL OF APPLIED PHYSICS
(2019)
Article
Physics, Applied
Srinivasu Kunuku, Yen-Chun Chen, Chien-Hsu Chen, Asokan Kandasami, Wen-Hao Chang, Huan Niu, Keh-Chyang Leou, I-Nan Lin
JOURNAL OF APPLIED PHYSICS
(2020)
Article
Chemistry, Physical
M. Rycewicz, M. Ficek, K. Gajewski, S. Kunuku, J. Karczewski, T. Gotszalk, I. Wlasny, A. Wysmolek, R. Bogdanowicz
Summary: A free-standing high boron-doped diamond nanosheet was successfully fabricated for the development of a flexible BDDNS strain sensor. Significant electrical conducting properties were observed from the resistance mapping of the BDDNS foil, and the BDDNS/Kapton device showed potential for low-strain sensor applications.
Article
Materials Science, Multidisciplinary
T. Chakraborty, K. J. Sankaran, K. Srinivasu, R. Nongjai, K. Asokan, C. H. Chen, H. Niu, K. Haenen
Summary: This work reports the enhancement of Ge and Xe vacancy centers in microcrystalline diamond (MCD) through He+ irradiation, achieving controlled growth of these defect centers and showing clear signature of enhancement through optical spectroscopy measurements.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Srinivasu Kunuku, Mateusz Ficek, Aleksandra Wieloszynska, Magdalena Tamulewicz-Szwajkowska, Krzysztof Gajewski, Miroslaw Sawczak, Aneta Lewkowicz, Jacek Ryl, Tedor Gotszalk, Robert Bogdanowicz
Summary: This study investigates the potential of boron and nitrogen co-doped diamond materials in electrical and electrochemical sensing applications. The results show that boron and nitrogen doping have a significant impact on the surface morphology and electrical properties of CVD diamond.
Article
Chemistry, Multidisciplinary
Ewelina Kowalewska, Mateusz Ficek, Krzysztof Formela, Artur Zielinski, Srinivasu Kunuku, Miroslaw Sawczak, Robert Bogdanowicz
Summary: Diamond particles have great potential to improve the mechanical, optical, and thermal properties of diamond-polymer composites. In this study, composites were prepared by adding microdiamond particles (MDPs) with different concentrations into polymers and subjected to a photocuring process. The results showed that the addition of MDPs significantly increased the fluorescence intensity of the composites.
Article
Chemistry, Multidisciplinary
Srinivasu Kunuku, Bo-Rong Lin, Chien-Hsu Chen, Chun-Hsiang Chang, Tzung-Yuang Chen, Tung-Yuan Hsiao, Hung-Kai Yu, Yu-Jen Chang, Li-Chuan Liao, Fang-Hsin Chen, Robert Bogdanowicz, Huan Niu
Summary: Multifunctional manganese-incorporated nanodiamonds (Mn-NDs) were fabricated through Mn ion implantation, and they demonstrated significant contrast enhancement in both in vitro and in vivo magnetic resonance imaging (MRI). Mn-NDs showed no cytotoxicity effect on cells. Therefore, Mn-NDs have great potential for cancer therapy in vivo imaging by MR imaging.
Article
Chemistry, Multidisciplinary
Sujit Deshmukh, Srinivasu Kunuku, Pawel Jakobczyk, Adrian Olejnik, Chien-Hsu Chen, Huan Niu, Bing Yang, Nianjun Yang, Robert Bogdanowicz
Summary: Researchers have developed electrochemical supercapacitors with improved cycling stability and energy density by implanting manganese ions into boron-doped diamond films. These supercapacitors exhibit high capacitance and exceptional cyclic stability, showing promise for high-rate electrochemical capacitive energy storage applications.
ADVANCED FUNCTIONAL MATERIALS
(2023)
