Pusan National University – TechConnect Briefs

Improve of Photovoltaic Performance of Dye-sensitized Solar Cell by Concentrating Solar Energy

Kim Y-W., Cho E., Choi S.C., Choi S.C., Lee D.W., Pusan National University, KR

Dye-sensitized solar cell (DSSC) is extremely promising because it is made of low-cost materials and does not need elaborate apparatus to manufacture against the silicon solar cell. Accordingly, the DSSC is constantly researched globally. One [...]

Improve of Photovoltaic Performance of Dye-sensitized Solar Cell by Concentrating Solar Energy

Kim Y-W., Cho E., Choi S.C., Choi S.C., Lee D.W., Pusan National University, KR

Dye-sensitized solar cell (DSSC) is extremely promising because it is made of low-cost materials and does not need elaborate apparatus to manufacture against the silicon solar cell. Accordingly, the DSSC is constantly researched globally. One [...]

Development of Precision Stage with Magnified Displacement System

Kim J.G., Choi S.C., Lee D.W., Pusan National University, KR

In this study, a new precision stage was developed using self-lever-mechanism to magnify its moving displacement optically. The developed precision stage was constructed as a position-sensitive photodiode (PSPD), a laser diode (LD), and a hinge-connected [...]

Dynamic change in water meniscus arising from tapping of an AFM tip

Hong S.D., Choi H.J., Ha M.Y., Jang J., Pusan National University, KR

We perform a molecular dynamics simulation to emulate the retraction followed by re-approach of an AFM with respect to a surface. We found a hysteresis in the snap-off distance and energy during such a tapping [...]

Enhanced oscillator strengths and optical parameters of doped ZnS bulk and nanophosphors

Sharma R., Kyhm K., Bhatti H.S., Pusan National University, KR

We synthesized, characterized, and investigated the oscillator-strength (OS), dipole-moment (DM) and integrated cross-section values (ICSVs) of singly (Mn) and doubly (Mn and Co or Ni) doped samples of ZnS bulk and nanophosphors. Although ZnS doped [...]

Molecular Simulation of the Nanoscale Water Confined between an Atomic Force Microscope Tip and a Surface

Choi H.J., Kim J-Y, Hong S.D., Ha M.Y., Jang J., Pusan National University, KR

Under ambient humidity, water condenses as a meniscus between an atomic force microscope (AFM) tip and a surface, giving rise to a strong capillary force on the tip. We performed a molecular dynamics simulation of [...]

Molecular Dynamics of Self-Assembled Monolayer Formation in Soft Nanolithgoraphy

Heo D., Yang M., Jang J., Pusan National University, KR

Molecular dynamics simulation is performed to study the growth mechanism of self-assembled monolayer in the AFM tip-assisted soft nanolithography such as in dip-pen nanolithography [1]. We investigate how the droplet created around the tip spreads [...]

A Study on the Fabrication of Micro Structure using Chemical Mechanical Micro Machining Process

Park J.M., Lee H.W., Jeong H.D., Pusan National University, KR

Single crystal silicon is widely used in the microelectronic industry. Recent advances in ultra precision machining have enabled the possibility of direct diamond turning of high quality surfaces on the brittle materials. As a brittle [...]