Articles you may be interested inField electron emission properties from zinc oxide nanostructures AIP Conf. Proc. 1502, 426 (2012); 10.1063/1.4769161 Three-dimensional shapes and distribution of FePd nanoparticles observed by electron tomography using highangle annular dark-field scanning transmission electron microscopy Fabrication of Mn-doped ZnO diluted magnetic semiconductor nanostructures by chemical vapor deposition J. Appl. Phys. 99, 08M119 (2006); 10.1063/1.2173235Fabrication and characterization of solid-state nanopores using a field emission scanning electron microscope Electron beam induced chemical vapor deposition ͑EBI-CVD͒ is one of the promising methods for nanofabrication. EBI-CVD has generally been carried out in conventional scanning electron microscopes and the minimum size of the deposits was in the range between 20 and 300 nm. In this study, a field emission gun scanning electron microscope ͑FE-SEM͒ and a field emission gun transmission electron microscope ͑FE-TEM͒ with gas introduction systems were employed for deposition using a W͑CO͒ 6 precursor in order to reduce the size of deposits. Dots, 15-20 nm in diameter, were produced using the FE-SEM. The dots consist mainly of tungsten with small amounts of carbon and oxygen. By using the FE-TEM, the diameter of the dots can be reduced to 3.5 nm. The relationship between probe size and dot diameter is discussed. Rods, the diameter of which was 8 nm, were also fabricated by scanning the beam position in the FE-TEM. Deposits produced by FE-TEM are smaller than those by conventional electron microscopes.

Public-opened Internet Electron Microscopy (POIT-EM) has successfully been developed in National Institute for Materials Science (NIMS), Tsukuba, Japan. Real-time observation and analysis of various samples can be performed from anyplace in the world (Fig. 1). This system uses data encryption and security mechanisms to ensure that only authorized users can access to the POIT-EM network. The client computers run on Windows XP. All kinds of operations necessary for the remote control of the SEM and TEM can be performed through the Internet; turning-on high voltage and changing magnification, focus, brightness and contrast. Previous systems based on a similar concept have been constructed for research purposes on ultra-high voltage microscopes 1-4. Unlike these systems, POIT-EM system is not only for researchers but also for educational purposes for young people.

Public Opened Internet Electron Microscopy (POIT-EM) has successfully been developed in National Institute for Materials Science (NIMS), Tsukuba , Japan. POIT-EM consists of a remote controllable scanning electron microscope (SEM) and a transmission electron microscope (TEM) which can be controlled from client terminals through the Internet. Real-time observation and analysis of various kinds of samples can be performed from anywhere in the world. Previous systems have been constructed for ultra-high voltage microscopes and some results with prototype devices have been reported 1-4 . Unlike these systems, POIT-EM system is not only for research purposes but also for young people education purpose. This paper describes a current status and development plan of POIT-EM at NIMS in Japan.POIT-EM was developed in 2001 and it has preliminary been run at National Museum of Emerging Science and Innovation (MIRAIKAN) at Daiba in Tokyo. Our statistic data revealed that more than half of the users, out of over 1,000 users, were children and students under 20 years old. This implies that POIT-EM is quite effective for science education. From last autumn, we started cooperation with Super Science High schools (SSHs) which is a project of the Ministry of Education, Culture, Sports, Science and Technology, to give higher priority to science education to designated high schools. SSHs are expected to make their best efforts on developing effective science curriculums and to give better education to train promising scientists, in cooperation with national institutes and universities.Because the network environment of SSHs varies from asymmetric digital subscriptor line (ADSL) to private lines and from bandwidths of 1.5Mbps to 100Mbps, we needed to develop a new network system to cope with various network environments. Fig.1 represents our network system of POIT-SEM. Two Windows-based PC servers (SEM PC and EDS PC) carry out the remote control and image data transfer. A video server outputs SEM images.A virtual private network (VPN) broadband router and an authentication server check users with one time password and protect the system from illegal users. The client console also consists of Windows XP PC, two displays, a printer, a SEM control knob set and a token device. Every operation necessary for the SEM observation can be performed through the Internet; turning-on high voltage and changing magnification, focus, brightness and contrast (Fig. 2). We did connection test of the system though NIMS's LAN, ADSL, private lines and optical fiber cables. Connections with each environment were confirmed, though the data transfer rate varies depending on the client-side bandwidth.We have successfully installed POIT-EM client at two SSHs in October 2003. For the general use at science classes and science clubs, students send SEM samples to NIMS , our technicians setup them in the specimen chamber and the students observe their samples from the client PCs, controlling the SEM on their own. We will continue public service based on educational...

The development of a remotely operated scanning electron microscopy (SEM) system and its use by high school students and the public as an outreach program are reported. The SEM and the server are located in the National Institute for Materials Science, Tsukuba, Japan, with client computers installed at a science museum and high schools. Using a secure virtual private network system and scheduling/management groupware, observation of SEM images and energy dispersive X-ray analysis are widely and frequently performed throughout Japan.