Solution processable PEDOT:PSS based hybrid electrodes for organic field effect transistors

Sanyoto, Bernardi,Kim, Soyeon,Park, Won-Tae,Xu, Yong,Kim, Jung-Hyun,Lim, Jong-Choo,Noh, Yong-Young Elsevier 2016 ORGANIC ELECTRONICS Vol.37 No.-

<P><B>Abstract</B></P> <P>We report high performance solution processed conductive inks used as contact electrodes for printed organic field effect transistors (OFETs). Poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT:PSS) electrodes show highly improved very low sheet resistance of 65.8 ± 6.5 Ω/square (Ω/□) by addition of dimethyl sulfoxide (DMSO) and post treatment with methanol (MeOH) solvent. Sheet resistance was further improved to 33.8 ± 8.6 Ω/□ by blending silver nanowire (AgNW) with DMSO doped PEDOT:PSS. Printed OFETs with state of the art diketopyrrolopyrrole-thieno[3,2-<I>b</I>]thiophene (DPPT-TT) semiconducting polymer were demonstrated with various solution processable conductive inks, including bare, MeOH treated PEDOT:PSS, single wall carbon nanotubes, and hybrid PEDOT:PSS-AgNW, as the source and drain (S/D) electrode by spray printing using a metal shadow mask. The highest field effect mobility, 0.49 ± 0.03 cm<SUP>2</SUP> V<SUP>−1</SUP> s<SUP>−1</SUP> for DPPT-TT OFETs, was obtained using blended AgNW with DMSO doped PEDOT:PSS S/D electrode.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Various solution processed conductive inks are applied for electrode of OFETs. </LI> <LI> Sheet resistance of 33.8 Ω/sq is achieved by blend of AgNW and PEDOT:PSS. </LI> <LI> High performance OFETs are demonstrated with blend of AgNW and PEDOT:PSS. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Catalytic Depolymerization of Alkali Lignin Using Supported Pt Nanoparticle Catalysts

Sanyoto, Bernardi,Dwiatmoko, Adid Adep,Choi, Jae-Wook,Ha, Jeong-Myeong,Suh, Dong Jin,Kim, Chang Soo,Lim, Jong-Choo American Scientific Publishers 2016 Journal of Nanoscience and Nanotechnology Vol.16 No.5

<P>Alkali lignin, a byproduct of the pulping process, was depolymerized using Pt nanoparticle catalysts. A depolymerized lignin with a lower molecular weight was obtained and characterized with GPC and NMR. P-31-NMR using OH-sensitive probing molecules showed the formation of guaiacyl OHs during the reaction, indicating the cleavage of guaiacyl ether bonds.</P>

Highly Dispersed Pt Nanoparticles for the Production of Aromatic Hydrocarbons by the Catalytic Degrading of Alkali Lignin

Sanyoto, Bernardi,Dwiatmoko, Adid Adep,Choi, Jae-Wook,Ha, Jeong-Myeong,Suh, Dong Jin,Kim, Chang Soo,Lim, Jong-Choo American Scientific Publishers 2016 Journal of Nanoscience and Nanotechnology Vol.16 No.5

<P>Aromatic hydrocarbons were produced from lignin, a complex natural amorphous polymer commonly regarded as by-product of the pulping process and from biofuel production. The catalytic decomposition of lignin using supported Pt catalysts was performed to produce small molecule hydrocarbons. Aromatic small-molecule hydrocarbon products were identified and quantified using GC/MS and GC-FID, which demonstrated that 27.6% of aromatic hydrocarbons were obtained from the activated carbon-supported Pt (Pt/AC) catalyst which had the highest Pt surface area.</P>

Infrared System for Intermittent Automatic Train Protection

Ahmad Sugiana,Mulyo Sanyoto,Parwito,M. Rachmat Gunawan,Key Seo Lee 제어로봇시스템학회 2015 제어로봇시스템학회 국제학술대회 논문집 Vol.2015 No.10

In order to prevent collision of the train movement or derailment, Automatic train protection (ATP) is needed as an important part of signaling system. Conventionally, a transponder or electro-magnet is used for communication between trackside device and onboard device of the ATP. ATP is not applied yet in Indonesia till now and all trains are operated by driver. So, ATP is become a necessity to protect the train operation in Indonesia. In other hand, performance of trackside equipment is also influenced by some environment problems such as heavy rain and theft of the equipment. Furthermore, some particular criteria such as low cost configuration, minimalized devices on the track, easy to maintenance, etc. have to be fulfilled by installed devices on trackside in order to solve the environment problems. We propose infrared system for automatic train protection in order to address the necessity and to meet the particular criteria. This ATP is the intermittent automatic train protection that is divided into onboard and trackside equipment. The onboard equipment consists of receiver of infrared, detecting and processing train speed, alarm and brake, detecting system error, logger, and power on self-test. The trackside equipment is formed of infrared transmitter that has function as the transducer. A cost-effective solution and ensures safety of train movement are covered by the ATP.

Effects of lignin on the ionic-liquid assisted catalytic hydrolysis of cellulose: chemical inhibition by lignin

Lee, Hwa-Jeong,Sanyoto, Bernardi,Choi, Jae-Wook,Ha, Jeong-Myeong,Suh, Dong Jin,Lee, Kwan-Young Springer-Verlag 2013 Cellulose Vol.20 No.5

적외선 시스템을 이용한 지상차상통신

아흐마드 수기아나(Ahmad Sugiana),물요 사뇨토(Mulyo Sanyoto),이기서(Key Seo Lee),최익(Ick Choy) 한국전자통신학회 2016 한국전자통신학회 논문지 Vol.11 No.8

열차에서 지상차상통신은 데이터를 전송하기 위해 트랜스폰더 또는 발리스 (balise) 와 같은 무선장비를 일반적으로 사용하고 있다. 그러나, 이러한 종래의 방식에는 다중경로 페이딩, 대역폭소스 제한, 다른 사용자들로부터의 간섭 등 과같은 단점들이 있다. 게다가 이러한 장비가 많이 설치될 경우에는 비용이 많이 든다. 이러한 문제를 해결하기 위하여 적외선 통신 시스템을 제안하고자 한다. 적외선 시스템을 사용하여 열차의 위치 같은 데이타를 열차로 전송 할 수 있다. 적외선 통신 프로토콜은 direct dedication configuration에 실용적인 무선 데이터통신을 제공할 수 있다. 뿐만 아니라, pole configuration경우에 적외선 시스템은 풍부한 대역폭 그리고 경제적장비설치비용, 폭우 때 장비이용의 신뢰성까지 제공한다. 본 논문에서는 통신기능과 실행평가측정 (measurement performance evaluation)에 대한 분석을 다루었다. 제안된 지상차상통신 시스템에는 적외선 수신기 및 적외선 송신기 사이를 약 6미터 까지 전송가능하며, 송신기의 반각은 19.65도로, 수신각은 15도로 설정되었다. The conventional track to train communication is commonly using radio based equipment such as transponder or balise to transmit the data. However, there are some drawbacks of the conventional equipment, for example multipath fading, source of bandwidth limitation, and interference from other users. Moreover, the radio based equipment is very expensive when installed in large numbers. To address these problems, we propose infrared system for trackside to train communication system. Infrared system offers a transmission of data to train and it can be processed to obtain at least a train location. Infrared communication protocol provides practical wireless data communication for direct dedication configuration. Furthermore, on the pole configuration the infrared system provides an abundant bandwidth, an economically sensible, minimalized installation of equipment on the trackside and reliability for heavy rain environment. This paper concentrates on the communication function and measurement performance evaluation. The proposed trackside to train communication system covers about 6 meters between infrared receiver and infrared transmitter, whereas the half angle of the transmitter is set to 19.65° and the receiver angle is 15°.

적외선 시스템을 이용한 경사 지역에서 열차 운행 속도 제어

아흐마드 수기아나(Ahmad Sugiana),물요 사뇨토(Mulyo Sanyoto),파르위토(Parwito),야나르디안 악리얀토(Yanardian Agrianto),이기서(Key Seo Lee),최익(Ick Choy) 한국전자통신학회 2016 한국전자통신학회 논문지 Vol.11 No.6

열차 속도 제어는 운영 트랙에서 안전 운동을 구축하기 위한 열차 보호의 중요한 일부분이다. 경사진 면적과 같은 열차를 보호하는 데 필요한 트랙의 특수한 조건이 있다. 더욱이 반달리즘 문제를 가진 개도국에서 특수한 조건은 트랙 사이드의 장비를 최소화하기 위한 설치가 요구된다. 더욱이 열대 국가에서 트랙 사이드는 수질에서 트랙 사이드 장비의 성능에 영향을 줄 것으로 보인다. 이러한 문제를 해결하기 위하여 적외선 시스템을 이용하여 경사진 면적에 대하여 열차 속도 제어를 제안한다. 전주 배열의 설치에 의해 이 시스템은 보다 적은 도전, 경제적인 민감성, 트랙 사이드의 장비의 최소 설치와 강우 환경에서 신뢰성을 제공한다. 본 논문은 경사진 면적에서 성능 평가를 측정하고 열차 속도를 제어하는데 중점을 준다. 제안한 열차 속도 제어 시스템은 시간 당 약 20km의 제어속도와 최대 3.6%의 경사진 면적에서 속도 제어와 감시가 가능하다. Train speed control is a vital part of train protection to build safe movement at an operation track. There is a special condition of track that needs more attention to protect the train, for example in slope area. Moreover, in developing country with vandalism problem, it requires to install minimalized equipment on the trackside. In addition, in tropical country, on tracksides it will be potentially pooling water that influences to the performance of trackside equipment. To address these problems, we propose the train speed control for slope area using infrared system. By installing on the pole configuration, the system offers a less challenging, economically sensible, minimalized installation of equipment on the trackside and reliability for heavy rain environment. This paper concentrates on the controlling train speed and measurement performance evaluation in slope area. The proposed train speed control system can monitor and control the speed in sloping area with maximum 3.6% and controlled speed about 20 km per h.

Trackside to Train Communication Using Infrared System

Ahmad Sugiana,Ick Choy,Key-Seo Lee,Mulyo Sanyoto 한국전자통신학회 2016 한국전자통신학회 논문지 Vol.11 No.8

The conventional track to train communication is commonly using radio based equipment such as transponder or balise to transmit the data. However, there are some drawbacks of the conventional equipment, for example multipath fading, source of bandwidth limitation, and interference from other users. Moreover, the radio based equipment is very expensive when installed in large numbers. To address these problems, we propose infrared system for trackside to train communication system. Infrared system offers a transmission of data to train and it can be processed to obtain at least a train location. Infrared communication protocol provides practical wireless data communication for direct dedication configuration. Furthermore, on the pole configuration the infrared system provides an abundant bandwidth, an economically sensible, minimalized installation of equipment on the trackside and reliability for heavy rain environment. This paper concentrates on the communication function and measurement performance evaluation. The proposed trackside to train communication system covers about 6 meters between infrared receiver and infrared transmitter, whereas the half angle of the transmitter is set to 19.65o and the receiver angle is 15o.