scanning electron microscope sem

GIÁO TRÌNH KÍNH HIỂN VI ĐIỆN TỬ QUÉT (Scanning Electron Microscope)

GIÁO TRÌNH KÍNH HIỂN VI ĐIỆN TỬ QUÉT (Scanning Electron Microscope)

... Cuối sấy khô mẫu Kính hiển vi quét môi trường (Enviroment Scanning Electron Microscope – ESEM) khắc phục khó khăn xử lý mẫu SEM Với ESEM ta quan sát phân tích mẫu mà không cần xử lý: mẫu không ... đơn giản nhiều so với TEM 2.2 Kính hiển vi điện tử quét (Scanning Electron Microscope, thường viết tắt SEM) : 2.2.1 Giới thiệu: SEM loại kính hiển vi điện tử tạo ảnh với độ phân giải cao bề mặt ... Introduction the Scan Electron Microscope – Theory, practical and procedures, Facility for advanced instrumentation – U.C.Davis Brandon Cheney, Introduction to Scanning Electron Microscopy, A...

Ngày tải lên: 27/05/2015, 23:22

32 2,1K 12
lectron energy spectrometers for the scanning electron microscope

lectron energy spectrometers for the scanning electron microscope

... develop electron energy spectrometers for the scanning electron microscope (SEM) At present, the detection systems of conventional SEMs are not generally designed to capture the energy spectrum of electrons ... spectrometer for the scanning electron microscope , Rev Sci Instrum 73 (2002) 227-229 1.14 A Khursheed, “Recent development in scanning electron microscope design”, Advances in Imaging and Electron Physics, ... distance SE Secondary electron BSE Backscattered electron AE Auger electron η Backscattered yield coefficient δ Secondary electron yield YA Auger electron yield np Number of primary electrons SNR Signal-to-noise...

Ngày tải lên: 10/09/2015, 15:53

159 231 0
Spectrometer attachments for the scanning electron microscope

Spectrometer attachments for the scanning electron microscope

... enlarged image of the sample [1.1-1.2] Scanning electron microscopes (SEMs), transmission electron microscopes (TEMs), and scanning transmission electron microscopes (STEMs) have been commercially ... specialized microscopes were originally developed from the SEM, such as STEMs, Scanning Auger Microscopes (SAMs), Scanning Cathodoluminescence Microscopes (SCMs) [1.3, 1.18-1.19] 11 1.1.2 Electron ... TEM/STEM analysis 1.1.1 The Scanning Electron Microscope The schematic in figure 1.1 shows a typical SEM setup It consists of an electron gun unit, a vacuum-sealed electron optical column, a high...

Ngày tải lên: 11/09/2015, 09:07

131 221 0
Effect of tunneling current on the growth of silicon islands on si(111) surfaces with a scanning tunneling microscope

Effect of tunneling current on the growth of silicon islands on si(111) surfaces with a scanning tunneling microscope

... the direction normal to the surface Experimental We used a UHV STM combined with a scanning reflection electron microscope (SREM ) The condition of the tungsten tip of the STM and the manipulation ... direction opposite to the flow of electrons This is similar to the effect of the electron wind force acting at electromigration [15,16 ] Therefore, the effect of the electron flow on the direction of ... center of the tip–sample interaction When the mobile silicon atoms on the surface have a positive electronic charge, the interaction between the electric field, created by applying a negative tip...

Ngày tải lên: 16/03/2014, 15:32

7 434 0
SCANNING ELECTRON MICROSCOPY_3 doc

SCANNING ELECTRON MICROSCOPY_3 doc

... untreated state, deep-etch HCl, SEM etch Dix-Keller b) 505 °C, hours, deep-etch HCl, SEM etch Dix-Keller 422 Scanning Electron Microscopy c) 515 °C, hours, deep-etch HCl, SEM etch Dix-Keller d) 525 ... optical microscope and electron microscope so it is necessary observation using TEM microscopy 3.6 SEM observation of the fracture surface Topography of fracture surfaces is commonly examined by SEM ... 440 Scanning Electron Microscopy strength was used as a practical indicator to investigate the strength development The microstructural analyses were performed using a scanning electron microscope...

Ngày tải lên: 29/06/2014, 14:20

206 139 0
SCANNING ELECTRON MICROSCOPY_1 ppt

SCANNING ELECTRON MICROSCOPY_1 ppt

... as ESEM: Environmental Scanning Electron Microscope, LVSEM: Low Vacuum Scanning Electron Microscope, HPSEM: High Pressure Scanning Electron Microscope, VPSEM: Variable Pressure Scanning Electron ... environmental scanning electron microscope, Scanning, 19, pp.(85-91) Gaseous Scanning Electron Microscope (GSEM): Applications and Improvement 15 Danilatos, G.D (1980) An atmospheric scanning electron microscope ... such as ESEM, LVSEM, HPSEM, VPSEM, CPSEM But all these microscopes differ from CSEM by the capability to introduce the gas as environment unlike High vacuum in CSEM Indeed, all these microscopes...

Ngày tải lên: 29/06/2014, 14:20

224 206 0
Báo cáo khoa học: "Site adaptations of Acanthogyrus (Acanthosentis) tilapiae: Observations through light and scanning electron microscopy" pptx

Báo cáo khoa học: "Site adaptations of Acanthogyrus (Acanthosentis) tilapiae: Observations through light and scanning electron microscopy" pptx

... nadamaR 32 1791 ,melasureJ ,snoitalsnarT cifitneicS rof margorP learsI ,534 p loV slaminA dliW dna citsemoD fo alahpecohtnacA IV oknehcorteP 22 601-99 ,34 ,6791 hsaW coS lacigolohtnimleH corP metsys...

Ngày tải lên: 07/08/2014, 18:21

4 266 0
ĐỀ TÀI KÍNH HIỂN VI ĐƯỜNG HẦM QUÉT STM ( The Scanning Tunneling Microscope )

ĐỀ TÀI KÍNH HIỂN VI ĐƯỜNG HẦM QUÉT STM ( The Scanning Tunneling Microscope )

... 3.3Hệ điều khiển truy hồi 3.4 Bộ áp điện QÚA TRÌNH LỊCH SỬ Kính hiển vi qt chui hầm STM (Scanning tunneling microscope) loại kính hiển vi phi quang học, sử dụng để quan sát hình thái học bề mặt ... bề mặt với độ phân giải cao Thiết bị gọi Kính hiển vi qt chui hầm phân cực spin (Spin-polarized scanning tunnelling microscopd) Ngồi ra, người ta tạo tính chui hầm khác ví dụ chui hầm với photon ... sang đầu đọc cho biết mức lượng hàng rào mức độ lồi lõm bề mặt Trong học lượng tử, chuyển động electron: ˆ Hψ ( z ) + U zψ ( z ) = Eψ ( z ) ψ ( z ) = ψ ( z = ) e −α z Nghiệm phương trình: α2...

Ngày tải lên: 27/05/2015, 22:48

13 1,2K 5
An integrated sputter ion pump add on lens unit for scanning electron microscopes

An integrated sputter ion pump add on lens unit for scanning electron microscopes

... sputter Scanning Electron ion pump Microscope (SEM) design Although compact permanent magnet add-on lenses have been used to improve the resolution of conventional scanning electron microscopes (SEMs), ... attachment for conventional scanning electron microscopes They dealt with a compact mixed 10 field add-on lens attachment for conventional scanning electron microscopes (SEMs) By immersing the specimen ... attachments for the scanning electron microscope, in Advances in Imaging and Electron Physics, Vol 122, pp 88-171 [1.2] A Khursheed (2001) Recent developments in scanning electron microscope design,...

Ngày tải lên: 28/09/2015, 13:38

106 208 0
Seminar tán xạ coulomb của electron

Seminar tán xạ coulomb của electron

... tán xạ S.dN Tiết diện tán xạ quan sát thí nghiệm 10 11 12 13 14 15 Tán xạ Coulomb electron 7-2010 Tán xạ Coulomb Electron Mô hình Xét Coulomb tạo điện tích cố định Bắt đầu với tán xạ Rutherford, ... Ⱥሺ‫ݕ‬ሻߖ௜ ሺ‫ݔ‬ሻ ሺ݂ ≠ ݅ ሻ (1) Trong e điện tích electron (e

Ngày tải lên: 28/04/2014, 18:09

27 323 0
Design of multi channel spectrometers for scanning ion electron microscopes

Design of multi channel spectrometers for scanning ion electron microscopes

... Khursheed, Scanning Electron Microscope Optics and Spectrometers, World Scientific, 2011 [1.6] E I Rau, V N E Robinson, An annular toroidal backscattered electron energy analyser for use in scanning electron ... present, the detection systems of the Scanning Electron Microscope (SEM) or Focused Ion Beam (FIB) are not generally designed to capture the energy spectrum of the ions/electrons scattered from the sample ... adapted to a standard scanning electron microscope, J Electron Spectrosc Relat Phenom., 105 (1999) 119 [1.9] M Belhaj, O Jbara, S Fakhfakh, Quantitative voltage contrast method for electron irradiated...

Ngày tải lên: 09/09/2015, 09:59

169 395 0
The novelty and surface to volume ratio dependent electron band structure in semiconductor nanowire

The novelty and surface to volume ratio dependent electron band structure in semiconductor nanowire

... Hamiltonian for electronic structure calculations is thus , where (2.2) is the kinetic energy operator for electrons, is the potential due to the nuclei, and is the internal electron- electron interaction ... DEPENDENT ELECTRON BAND STRUCTURE IN SEMICONDUCTOR NANOWIRE By Donglai Yao In the field of nanotechnology, we focus this thesis on the novelty and surface-to-volume ratio dependent electronic ... Hohenberg and W Kohn Inhomogeneous electron gas Phys Rev., 136(3B):B864–B871, 1964 [3] R Rurali, B Aradi, T Frauenheim, and A Gali Electronic structure of semiconductor nanowires Phys Rev B,...

Ngày tải lên: 09/09/2015, 18:55

111 269 0
Characterization and numerical simulation of gallium nitride based metal oxide semiconductor high electron mobility transistor with high k gate stack

Characterization and numerical simulation of gallium nitride based metal oxide semiconductor high electron mobility transistor with high k gate stack

... Transistor HEMT High Electron Mobility Transistor MOSFET Metal-Oxide-Semiconductor Field Effect Transistor MESFET Metal-Semiconductor Field Effect Transistor 2-DEG 2-Dimensional Electron Gas CFOM ... to the optoelectronics market as the microelectronics market for GaN is still at its infancy Several other III-V compound semiconductors, such as Arsenide-based and Phosphide-based semiconductors, ... as the Metal-Oxide-Semiconductor High Electron Mobility Transistor (MOSHEMT) as shown in Figure 2.8 19 Figure 2.8 A typical illustration of a Metal-Oxide-Semiconductor High Electron Mobility Transistor...

Ngày tải lên: 03/10/2015, 20:31

142 446 0
Characterization and numerical simulation of gallium nitride based metal oxide semiconductor high electron mobility transistor with high k gate stack

Characterization and numerical simulation of gallium nitride based metal oxide semiconductor high electron mobility transistor with high k gate stack

... Transistor HEMT High Electron Mobility Transistor MOSFET Metal-Oxide-Semiconductor Field Effect Transistor MESFET Metal-Semiconductor Field Effect Transistor 2-DEG 2-Dimensional Electron Gas CFOM ... to the optoelectronics market as the microelectronics market for GaN is still at its infancy Several other III-V compound semiconductors, such as Arsenide-based and Phosphide-based semiconductors, ... as the Metal-Oxide-Semiconductor High Electron Mobility Transistor (MOSHEMT) as shown in Figure 2.8 19 Figure 2.8 A typical illustration of a Metal-Oxide-Semiconductor High Electron Mobility Transistor...

Ngày tải lên: 12/10/2015, 17:36

142 925 0
Seminar_San_xuat_kim_chi

Seminar_San_xuat_kim_chi

Ngày tải lên: 08/08/2012, 11:00

25 729 0
Bài giảng Scanning

Bài giảng Scanning

... www.themegallery.com NỘI DUNG Định nghĩa Scanning Các kiểu Scanning Các bước Scanning Các công cụ sử dụng để Scanning www.themegallery.com Định nghĩa ScanningScanning ba giai đoạn Information Gathering ... cần tìm kiếm giai đoạn Scanning:  Địa IP hệ thống đích  Hệ điều hành  Kiến trúc hệ thống  Các cổng mở dịch vụ chạy hệ thống Các kiểu Scanning  Có kiểu Scanning:  Port Scanning: Quét cổng để ... thái active  Network Scanning: Quét dải mạng để xác định host mạng hoạt động  Vulnerability Scanning: Quét lỗ hổng hệ điều hành, ứng dụng hoạt động Các bước Scanning Các bước Scanning  Checking...

Ngày tải lên: 15/08/2012, 10:32

16 1,7K 19
Seminar nấm penicillium

Seminar nấm penicillium

... đoạn tồn trữ sau thu hoạch Hoặc loài Penicillium marneffei gây bệnh lở loét toàn thân người Từ seminar: “Nấm Penicillium” thực nhằm mục đích hiểu rõ loại nấm này, biết ứng dụng chúng đời sống,...

Ngày tải lên: 18/08/2012, 20:44

23 2,3K 8
w