Abstract: The present invention relate to a method for authenticating a low performance device, and more particularly, to a device authenticating method, in which a low performance device such as a smart meter of a smart grid is authenticated in a matrix operation instead of an exponential operation through a homomorphic hash function (HHF) of a non-square matrix M, so that the amount of operations required for authenticating the device can be reduced and the device can be safely authenticated even without a separate certificate authority.

Abstract: The present invention relate to a method for authenticating a low performance device, and more particularly, to a device authenticating method, in which a low performance device such as a smart meter of a smart grid is authenticated in a matrix operation instead of an exponential operation through a homomorphic hash function (HHF) of a non-square matrix M, so that the amount of operations required for authenticating the device can be reduced and the device can be safely authenticated even without a separate certificate authority.

Abstract: The light extraction efficiency of a typical light-emitting diode (LED) is improved by incorporating one-dimensional ZnO nanorods. The light extraction efficiency is improved about 31% due to the waveguide effect of ZnO sub-microrods, compared to an LED without the nanorods. Other shapes of ZnO microrods and nanorods are produced using a simple non-catalytic wet chemical growth method at a low temperature on an indium-tin-oxide (ITO) top contact layer with no seed layer. The crystal morphology of a needle-like or flat top hexagonal structure and the density and size of ZnO microrods and nanorods are easily modified by controlling the pH value and growth time. The waveguide phenomenon in each ZnO rod is observed using confocal scanning electroluminescence microscopy (CSEM) and micro-electroluminescence spectra (MES).

Abstract: Disclosed herein is a scanning probe microscope having an improved structure to precisely control a distance between a scanning probe and a surface of a sample. The scanning probe microscope includes a sample stage having a support structure on which a sample to be measured is placed and generating vibration, and a scanning probe not attached to the sample stage but independently constituted and scanning a surface of the sample placed on the sample stage and vibrated by the sample stage.

Abstract: The light extraction efficiency of a typical light-emitting diode (LED) is improved by incorporating one-dimensional ZnO nanorods. The light extraction efficiency is improved about 31% due to the waveguide effect of ZnO sub-microrods, compared to an LED without the nanorods. Other shapes of ZnO microrods and nanorods are produced using a simple non-catalytic wet chemical growth method at a low temperature on an indium-tin-oxide (ITO) top contact layer with no seed layer. The crystal morphology of a needle-like or flat top hexagonal structure and the density and size of ZnO microrods and nanorods are easily modified by controlling the pH value and growth time. The waveguide phenomenon in each ZnO rod is observed using confocal scanning electroluminescence microscopy (CSEM) and micro-electroluminescence spectra (MES).

Abstract: Disclosed is a method for manufacturing a conductive organic thin film device. An air-bridge type of an upper electrode is formed over a lower electrode by using a sacrificial layer and then a gap having a thickness of several nano meter is formed in a part at which the upper electrode and the lower electrode intersect by removing the sacrificial layer. The conductive organic molecules are uniformly adsorbed between the upper electrode and the lower electrode of the nano gap. Adsorption extent of the conductive organic molecules is confirmed by observing a current flowing through the upper and lower electrodes when the conductive organic molecules are adsorbed. Thus, reproducibility of a manufacturing process is improved and mass production is facilitated by adoption of a standardized process.

Abstract: A new compound derivative that can be used to form a unit molecular film as a rectifier in a molecular electronic device, a new rectifying compound (4,5,9,10-tetrahydro-pyren-2-yl)-carbamic acid 4-(2-methylsulfanyl-alkyl)-3,5-dinitro-benzyl ester and its derivative (4,5,9,10-Tetrahydro-pyren-2-yl)-carbamic acid 4-(2-methylsulfanyl-alkyl)-3,5-dinitro-benzyl ester, and methods of synthesizing the compounds are provided.

Abstract: A new compound derivative that can be used to form a unit molecular film as a rectifier in a molecular electronic device, a new rectifying compound (4,5,9,10-tetrahydro-pyren-2-yl)-carbamic acid 4-(2-methylsulfanyl-alkyl)-3,5-dinitro-benzyl ester and its derivative (4,5,9,10-Tetrahydro-pyren-2-yl)-carbamic acid 4-(2-methylsulfanyl-alkyl)-3,5-dinitro-benzyl ester, and methods of synthesizing the compounds are provided.

Abstract: The present invention is directed to a novel 4-sulfanylalkyl-3,5-dinitro benzyl alcohol compound and its preparation method, more specifically, derivatives of 4-sulfanylalkyl-3,5-dinitro benzyl alcohol compound having the following formula 1 and its preparation method: wherein, R is hydrogen, alkyl group, or acetyl group, and n is an integer of 1 to 25. The organic compound of the present invention can be used as a material for molecular electronic device.

Abstract: The present invention is directed to a novel 4-sulfanylalkyl-3,5-dinitro benzyl alcohol compound and its preparation method, more specifically, derivatives of 4-sulfanylalkyl-3,5-dinitro benzyl alcohol compound having the following formula 1 and its preparation method: 1