Band gap

Zinc oxide is highly sought after for several applications in biology, optoelectronics, electronics, and sensing. Zinc oxide nanorods exhibit a high exciton binding energy and a wide direct band gap, making them an attractive material for ultraviolet optoelectronic devices in the compound semiconductor field.

6p viling 11-10-2024 2 0   Download

The results showed that GdFeO3 photocatalyst had a good performance under visible light irradiation. The remarkable enhancement photo-Fenton catalytic activity of GdFeO3 material could be attributed to its small particle size and narrow band gap energy.

6p vikwong 29-09-2024 2 1   Download

In this communication, we synthesized the composite of MoO3/TiO2 with hierarchical electronic structure via the facile impregnation combined with calcination of precursors. Beside the forming of composites, the asprepared samples were in a desire of Mo-doping into TiO2 lattice, due to the smaller radius of Mo+6 compared to Ti+4, leading to the reduction of the band gap.

7p vikwong 29-09-2024 3 1   Download

In this study, a CuZnO2/MSU photocatalyst was developed using a simple method and common resources. Characterization through XRD, BET, EDX, TEM, and SEM techniques revealed its worm-hole structure and uniform CuZnO2 distribution. The catalyst exhibited a reduced band gap of 2.4 eV and a substantial surface area of 307 m²/g, facilitating 94% degradation of Ciprofloxacin (CIP) within 4 hours of light exposure.

7p vikwong 29-09-2024 3 1   Download

The F2B slab model weakens the oscillations and calculations on F2B model quickly converge. However, the F2B model leads to artificial narrowness of band gap. Besides, when the number of layers increases, surface energy obtained from all three slab models approaches similar values. In particular, values of surface energy from DFT calculations converge to the experimental range for all three slab models.

8p dianmotminh02 03-05-2024 9 2   Download

Bài giảng "Tinh thể Photonic Band Gap công nghệ Nano" được biên soạn với các nội dung chính sau: Vật lý học tinh thể vùng trống năng lượng quang tử; Phân loại tinh thể quang tử; Chế tạo; Ứng dụng; Các thiết bị PBG đầu tiên/ nguyên mẫu; Những nghiên cứu hiện nay; Xu hướng tương lai; Kết luận. Mời quý thầy cô và các em sinh viên cùng tham khảo bài giảng!

27p kimphuong59 01-02-2023 18 6   Download

Trong bài báo này, một cấu trúc dải chắn điện từ phức hợp mới được đề xuất. Kết hợp giữa cấu trúc dải chắn điện từ EBG (Electromagnetic Band Gap) hình răng lược và cấu trúc mặt phẳng đất khuyết DGS (Defected Ground Structure) hình phức hợp, cấu trúc đề xuất đã giảm được 52% kích thước so với EBG hình nấm truyền thống. Phân tích trên đồ thị tán sắc, cấu trúc này cho hai dải chắn tại hai băng tần 2.75 GHz-3.84 GHz và 4.3 GHz7.3 GHz, có thể ứng dụng cho việc cải thiện các đặc tính của anten trên băng tần 3.5 GHz và 5 GHz của truyền thông vô tuyến thế hệ thứ 5 (5G) băng tần dưới 6GHz.

5p wangziyi_1307 26-04-2022 39 4   Download

In this paper, we present one method to determine the band gap energy of ZnO and ZnO:Tb3 materials. ZnO:Tb3 material has prepared by forced hydrolysis method. All samples have zinc oxide hexagonal wurzite structure. The obtained results show that the energy of the band gap depends on Tb3 molar ratio.

6p tamynhan5 10-12-2020 10 2   Download

This indicates that the Ce ion has an effect on the structure of ZnWO4 and suggests a solubility limit of Ce in ZnWO4 ceramics. In addition, we also calculated the Raman active modes by using group theory and we received 18 modes in Raman active and 16 modes in IR active. The absorption measurement indicates the band gap of ZnWO4 decreases with increasing Y content. The reasons for the above changes are discussed in this presentation.

5p tamynhan8 04-11-2020 17 1   Download

Characterization results show that N-doped TiO2 samples have a broader absorption spectrum and a higher antibacterial efficiency against E. coli than pure samples. The DFT calculation suggests that nitrogen ion doping induces the formation of new states closed to the valence band leading to a narrowing of the band gap and a great improvement in photocatalytic activity in the visible light region of the doped material.

8p tamynhan8 04-11-2020 8 1   Download

Borotellurite glasses were prepared by melt quenching technique. Amorphous nature of samples was confirmed through X-ray diffraction (XRD) patterns. Effect of B2O3 content on the structure of glass network was studied through Fourier-transform infrared spectroscopy (FTIR) spectra. Optical band gap and Urbach energy were found from analysis of optical absorption spectra. Thermal studies were carried out by using Differential thermal analyzer (DTA) measurements.

8p tamynhan6 14-09-2020 14 2   Download

Pirochromite (MgCr2O4) nanoparticles were successfully prepared in this study. During synthesis of the pirochromite nanoparticles, a sol-gel was prepared by using magnesium acetate and potassium dichromate as magnesium and chromium sources and by using stearic acid as the network.

8p tocectocec 25-05-2020 8 2   Download

Hội chứng (HC) Cri du chat là một trong những bệnh di truyền hiếm gặp do mất đoạn cánh ngắn nhiễm sắc thể (NST) số 5. Tỷ lệ mắc bệnh là 1/15000-1/50000 trẻ đẻ sống. Mục tiêu: Phát hiện mất đoạn cánh ngắn NST số 5 gặp trong HC Cri du chat bằng kỹ thuật di truyền tế bào.

6p vithomas2711 16-03-2020 47 2   Download

5G antenna is so compact size but has to get large bandwidth, high gain and good radiation efficiency to be able to support huge data rate for 4.0 revolution industry. In this paper, a novel 4x4 multiband Multiple Input Multiple Output (MIMO) antenna is designed. Using the semi-circle structure, the proposed antenna not only achieves wide band but also is easy to optimize operate frequencies at millimeter wave band.

8p vitunis2711 11-12-2019 32 4   Download

Chemical doping nitrogen in to TiO2 crystal network by methods of sol-gel and impregnation was presented. The obtained nitrogen-doped TiO2 materials were characterized by different techniques such as XRD, SEM, UV-VIS. It was shown that samples have very uniform nano size, anatas structure and low level of band-gap energy (Ebg ~ 2.2 eV, ~ 500 - 600 nm). Their activity and kinetic were also studied and the results proved that in comparison with P25, the obtained nitrogen-doped TiO2 had higher activity and photo-quantum efficiency in organic disintegrated reaction under solar radiation.

6p uocvong01 24-09-2015 52 8   Download

Purified, nonubiquitinated growth-associated protein of 43 kDa (GAP-43) was attacked by purified reticulocyte 20S proteasomebutnotby the26Sproteasome.Cleavageyielded 12 N-terminally labelled GAP-43 fragments that could be resolved by SDS/PAGE. Inhibitor experiments suggested that proteasomeb1 activity yielded the resolved bands and that proteasome b5 activity generated nonresolvable frag-ments. Processive degradation, yielding only nonresolvable fragments, therefore did not occur.

14p dell39 03-04-2013 33 3   Download

DSB-FC (AM): công suất sóng mang chiếm 2/3 tổng công suất DSB-FC (AM): sóng mang không mang thông tin DSB: sử dụng gấp đôi tần số so với SSB Chì có băng cạnh chứa thông tin thông tin USB = thông tin LSB truyền tải cả 2 băng cạnh là dư thừa DSB-FC: không lợi về băng thông và công suất DSB-SC: không lợi về băng thông

52p feteler 27-11-2012 54 3   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: First-Principles Study of the Band Gap Structure of OxygenPassivated Silicon Nanonets

5p sting09 21-02-2012 41 4   Download

Mục tiêu: Xác định tỉ lệ gen SMN1/SMN2 ở người lành mang gen bệnh Werdnig-Hoffmann. Phương pháp: Chúng tôi dùng phản ứng khuếch đại cạnh tranh tạo ra các sản phẩm PCR của SMN1 và SMN2. Sau đó, làm đứt đoạn sản phẩm PCR của gen SMN bằng men Hinfl. Sản phẩm thu được sẽ được chạy điện di trên gel, rồi scan bằng máy ảnh Polaroid dưới tia cực tím, và phân tích đậm độ (phần mềm 1.16/ppc NIH Image) đối với hai dãi band 101 bp (SMN2) và 78 bp (SMN1). Tỉ lệ gen SMN1/SMN2 được xác...

14p nuoccam111 05-05-2011 96 4   Download

Introduction to LEDs: How LEDs work + some points. Comparison with other sources of light. LED in communication. Blue &White LED technologies. How they are made? Their application? Brief about blue laser? Stands for light emitting diode. Semiconductor device: p-n junction forward-biased.current emits incoherent narrow spectrum light (due to recombination in transition region near the junction.) Color of the emitted light depends on the chemical of the semiconducting material used. (Near-ultraviolet, visible or infrared.)...

52p lehieukutek 26-12-2009 217 135   Download