Single Molecule Electronics And Nano-Fabrication of Molecular Electronic Systems S.Rajagopal, J.M.Yarrison-Rice Physics Department, Miami University Center.

Slides:

Advertisements

Similar presentations

Conclusions Future work Methods Background Introduction Lily Stanley, Juan Du, and Xuan Gao Department of Physics, Case Western Reserve University Nanowire.

Advertisements

Introduction. The successful implementation of copper electroplating in the metallization of chip interconnect structures derives from the use the electrolyte.

EXP.1 Daniel Cell How does the Daniel cell works? – The copper strip attracts electrons from the zinc strip. These electrons pass through the wires of.

Electrical transport and charge detection in nanoscale phosphorus-in-silicon islands Fay Hudson, Andrew Ferguson, Victor Chan, Changyi Yang, David Jamieson,

Carbon nanotube field effect transistors (CNT-FETs) have displayed exceptional electrical properties superior to the traditional MOSFET. Most of these.

Electrochemical Cells

№4. Soap film Create a soap film in a circular wire loop. The soap film deforms when a charged body is placed next to it. Investigate how the shape of.

Silicon Nanowire based Solar Cells

Marie Curie Actions Early Stage Researcher Training Network Interdisciplinary Nanoscience Center (iNANO) Department of Physics and Astronomy University.

Chemical Nanoparticle Deposition of Oxide Nanostructured Thin Films 6. Conclusions 2. Experimental Setup 1. Abstract We have developed a novel approach.

ENEE-698E 2 nd presentation by: Saeed Esmaili Sardari November 06, 2007.

SYNTHESIS OF COPPER NANOWIRES WITH NANO- TWIN SUBSTRUCTURES 1 Joon-Bok Lee 2 Dr. Bongyoung I. Yoo 2 Dr. Nosang V. Myung 1 Department of Chemical Engineering,

Observation of Negative Differential Resistance Jiasen Ma Supervisor: Philippe Guyot-Sionnest Due to resonant tunneling the transmission coefficient gets.

Polypyrrole Nanoribbon Based Nano Gas Sensors Sergio Hernandez, Nicha Chartuprayoon and Nosang V. Myung Department of Chemical and Environmental Engineering,

Origin of Coulomb Blockade Oscillations in Single-Electron Transistors

Electrical Characterization of Nanowires Steven Kuo San Jose State University Thesis Advisor Dr. Emily Allen San Jose State University Research Advisor.

Advanced Semiconductor Devices Y-BRANCH SWITCH (YBS) Anubhav Khandelwal.

Nanoscale Electrode Development for Fundamental Studies of Mixed Ionic and Electronic Conductors as High Temperature Fuel Cell Components Jeevitha Evanjeline.

Nucleation of gold nanoparticles on graphene from Au 144 molecular precursors Andrei Venter 1, Mahdi Hesari 2, M. Shafiq Ahmed 1, Reg Bauld 1, Mark S.

Fig 10: I-V characteristics of Au/PDNC/Al/Au junction. This shows that the molecule has rectification towards the positive bias. Current (A) M I A M I.

ISAT 436 Micro-/Nanofabrication and Applications MOS Transistor Fabrication David J. Lawrence Spring 2001.

PREPARATION OF ZnO NANOWIRES BY ELECTROCHEMICAL DEPOSITION

VFET – A Transistor Structure for Amorphous semiconductors Michael Greenman, Ariel Ben-Sasson, Nir Tessler Sara and Moshe Zisapel Nano-Electronic Center,

Optical Characterization of GaN-based Nanowires : From Nanometric Scale to Light Emitting Devices A-L. Bavencove*, E. Pougeoise, J. Garcia, P. Gilet, F.

Potentiometry and potentiometric measurements. potentiometer A device for measuring the potential of an electrochemical cell without drawing a current.

Spin Dependent Transport Properties of Magnetic Nanostructures Amédée d’Aboville, with Dr. J. Philip, Dr. S. Kang, with Dr. J. Philip, Dr. S. Kang, J.

Metallization: Contact to devices, interconnections between devices and to external Signal (V or I) intensity and speed (frequency response, delay)

Electrochemistry Physical Chemistry. Daniel Cell 1. Electrochemistry is the study of the interconversion of electrical and chemistry energy. 2. Voltaic.

On the application potential of gold nanoparticles in nanoelectronics and biomedicine by Melanie Homberger, and Ulrich Simon Philosophical Transactions.

C7 - Nanotechnology. Syllabus statements C.7.1 Define the term nanotechnology. C.7.2 Distinguish between physical and chemical techniques in manipulating.

Fabrication and characterization of Au-Ag alloy thin films resistance random access memory C. C. Kuo 1 and J. C. Huang 1,* 1 Department of Materials and.

Nanowires and Nanorings at the Atomic Level Midori Kawamura, Neelima Paul, Vasily Cherepanov, and Bert Voigtländer Institut für Schichten und Grenzflächen.

MPI Stuttgart Max-Planck-Institut fuer Festkoerperforschung Stuttgart, Germany R. Sordan, K. Balasubramanian, M. Burghard WP2(A): Single fullerene transistor.

Microwave Assisted ZnO Nanorod Growth for Biosensing This material is based upon work supported by the National Science Foundation.

Figure Experimental setup of a mechanically controllable break- junction with (a) the flexible substrate, (b) the counter supports, (c) the notched.

Micro- and macro-machines, actuators and "muscles" based on molecular species.

Fabrication Technology(1)

Imaging & Actuation of Nanocar Molecules by Scanning Tunneling Microscopy (NIRT – ECCS # ) A. J. Osgood, 1 J. Zhang, 1 T. Sasaki, 2 J. Guerrero,

UNIVERSITY OF NOTRE DAME Origin of Coulomb Blockade Oscillations in Single-Electron Transistors Fabricated with Granulated Cr/Cr 2 O 3 Resistive Microstrips.

NOVEL NANOARRAY STRUCTURES FORMED BY TEMPLATE BASED APPROACHES: TiO 2 NANOTUBES ARRAYS FABRICATED BY ANODIZING PROCESS COMPOSITE OF V 2 O 5 AEROGEL NANOWIRES.

Norhayati Soin 05 KEEE 4426 WEEK 12/1 3/13/2005 KEEE 4426 WEEK 12 CMOS FABRICATION PROCESS.

Top-Down Meets Bottom-Up: Dip-Pen Nanolithography and DNA-Directed Assembly of Nanoscale Electrical Circuits Student: Xu Zhang Chad A. Mirkin et al. Small.

Kyoto UniversityHong Kong University of Science and Technology Coventor Tutorial Bi-Stable Mechanical Beam Simulation -Remote Desktop Connection -Material.

0-D, 1-D, 2-D Structures (not a chapter in our book!)

Sid Nb device fabrication Superconducting Nb thin film evaporation Evaporate pure Nb to GaAs wafer and test its superconductivity (T c ~9.25k ) Tc~2.5K.

 Water covers about ¾ of the earth  Living cells are 70% -95% water  In nature water exists in 3 physical states of matter: ◦ Solid, liquid, gas 

Atomic Layer Deposition for Microchannel Plate Fabrication at Argonne

Shadow Nanosphere Lithography Peter J. Shin Department of Bioengineering.

March 3rd, 2008 EE235 Nanofabrication, University of California Berkeley Hybrid Approach of Top Down and Bottom Up to Achieve Nanofabrication of Carbon.

Chemical Approaches to Nanostructured Materials Springer Handbook of Nanotechnology (2004): Ch. 2.

A. Orozco, E. Kwan, A. Dhirani Department of Chemistry, University of Toronto SCANNING TUNNELING MICROSCOPY: A NEW CHM 326 LAB.

IH2655 Seminar January 26, 2016 Electrical Characterization,B. Gunnar Malm

SCI3023 ELECTROCHEMISTRY Chapter 8e: Potentiometry

Methodology Electrodeposited Pt and Pt/Ni electrodes for dye sensitized solar cells with improved stability G. Syrrokostas, G. Leftheriotis* and P. Yianoulis.

Bulk Electrolysis: Electrogravimetry and Coulometry

1 VALENCE SHELL OUTERMOST ENERGY LEVEL CONTAINING ELECTRONS IN THE GROUND STATE.

Weekly Group Meeting Report

II. Fabrication process

Potentiometry and potentiometric measurements

Potential and Current Control

Chiral Recognition of 4,4’ Biphenyl Dicarboxylic Acid (BPDA) on fcc(111) Surfaces in Electrochemical Solutions Byung I. Kim, Department of Physics, Boise.

Temperature Sensors on Flexible Substrates

SELF-FOLDING TECHNIQUE

Presented by Yiin-Kuen(Michael) Fuh 2007/3/19

Electrochemical cells

s Changes: Cite figures under EIS

Controllable Multinary Alloy Electrodeposition for Thin-Film Solar Cell Fabrication: A Case Study of Kesterite Cu2ZnSnS4 Jie Ge, Yanfa Yan iScience

BONDING The construction of any complicated mechanical device requires not only the machining of individual components but also the assembly of components.

2. SEM images of different SiNW structures 3.Results and discussion

Presentation transcript:

Single Molecule Electronics And Nano-Fabrication of Molecular Electronic Systems S.Rajagopal, J.M.Yarrison-Rice Physics Department, Miami University Center For Nanotechnology, Oxford, OH.

Highlights ¤ Organometallic paddlewheel complex ¤ Fabrication of two electrode and gated devices using EBL ¤ Closing of gap using electrodeposition ¤ Breaking a nanowire by electromigration ¤ Characterization of the fabricated nanogap

Process Steps Fabricate nano-gap electrodes with EBL Close gap to nano-gap using electrodeposition Characterize the nano-gap Deposit molecule and study the gap

The Molecule ¤ Paddlewheel bridging ligands ¤ Re-Re Quadruple bond ¤ Anchoring thiol group ¤ Ir-Ir Double bond ¤ Os-Os Triple bond

Fabrication of Nanogap Electrodes ¤ Raith 150 EBL system ¤ Different gold thickness (100/150/250 nm) on top of 30nm Cr A B C D 300nm E

Fabrication Results ¤ Two electrode devices ¤ GDS2 design ¤ Design gap 75nm ¤ Gap=74nm ¤ After metal evaporation of Cr/Au ¤ Gap=53nm ¤ After EBL & development

Fabrication Results ¤ Gated electrode devices ¤ GDS2 gated design ¤ Design gap 60nm ¤ After metal evaporation of Cr/Au ¤ Gap=10nm ¤ Gated device with 3 contact pads 1 2 3

Closing the Gap Using Electrodeposition ¤ Packaging = Wire bonding + Epoxy cavity ¤ Package: Kovar material ¤ Wire bonding of contact pads to external leads ; Substrate temp ~150 ° C ¤ Epoxy cavity for forming the electrochemical cell 21

Factors To Consider ¤ Method  Setup ( 2 methods tried ) ¤ Electrolyte composition ( 2 compositions ) ¤ Deposition current ¤ Electrolyte concentration ( 4 concentrations)

Closing the Gap Using Electrodeposition ¤ Method: Constant current ; Monitor the voltage across WE and RE ¤ Electrolyte composition: 0.42 M Na 2 SO M Na 2 S 2 O M NaAuCl 4 ¤ Non-toxic and without strongly adsorbed ions ¤ At room temperature ¤ Electrodeposition Setup 1 (Non Cyanide)

Results of Electrodeposition (Method 1) ¤ Time evolution curve of V gap at a constant current of 25 µA on a chart recorder ¤ SEM image of fused electrodes after electrodeposition Stop ¤ I-V curve showing hysteresis

Difficulties with Method 1 ¤ Method requires precise switching on desired gap voltage  Manual ( less precise) ¤ Open loop system (no feedback) ¤ Lacks control on deposition rate ¤ Solution stability problem ¤ No two fabricated pairs showed the same growth pattern with similar initial/final gap voltages

Modified Setup – Self-terminating ¤ Method: Constant current ; More directional growth ¤ Preset current for desired gap : 5/10/20/50nA ¤ Mix C & D : 0.4 M Na 2 SO M Na 2 S 2 O M Na 2 Au(S 2 O 3 ) M Sodium citrate ¤ Solution more stable (for more than 2 weeks) Galvanostat DMM Faraday Cage WE RE/CE 200μ J. Xiang, B.Liu, B.Liu, B. Ren, Z.Q. Tian, Electrochemical Communications vol. 8, pp , 2006 I total I total = I dep + I tunnel I dep I tunnel

Electrodeposition Results Mag=2.2 Kx I=-10nA Mag=36 Kx I=-10nA Left electrode Right electrode Abnormal growth But, fine grain size Mag= 15 Kx I=-10nA Left electrode Right electrode

Results & Difficulties I (A) V (V) ¤ Growth moderately fine, but not predictable in all pairs ¤ Abnormal growth due to surface contamination ¤ Small structural shapes of electrode not retained ¤ Initial/Final V of nanogap showed no trend ¤ All final I/V curves showed huge gaps

Design and Setup Changed ¤ New design tried to retain shape and avoid folding patterns ¤ New electrolyte delivery to localize to single pair ¤ Solution modification to minimize deposits on other electrode ¤ Minimize surface contamination 700 nm Revamped Previous

Results – SEM Micrographs ¤ Out of 8 pairs, 6 pairs showed similarly growth ¤ A small gap (~10nm) could be realized using SEM images ¤ Abnormal growth seems controlled ¤ Electrode shape retained

I-V Results of Nanogap Pair 1 Pair 2

Steps Ahead ¤ Design change 2 (Should make growth pattern more clear) ¤ Investigate why no similarity in the I-V curve ¤ Investigate affect of thickness of insulation layer on electrodeposition results (Use thicker insulation layer above substrate) ¤ Effective way of depositing a long (~1nm) organic molecule across nanogap ¤ Measure electrical characteristics after depositing the molecule

Molecule Land ¤ Paddlewheel complex synthesized. ¤ Anchoring ligands are attached. ¤ Final analysis of the complex… Device Fabrication Land ¤ Two electrode and Gated electrode device with larger nano-gap separation fabricated. ¤ Electrodeposition parameters determined for achieving 10nm gap. ¤ Fine-tuning of electrodeposition parameters for <10nm gap… Conclusion

Thank you !