Following is my notes based on the seminar by Prof. Ajayan from Rice University at UT AUstin on April 15, 2011. Seminar Name: “Engineering nanocarbons: future and challenges”
How to make better carbon?
- Grierson, JAP 107, 0333523, 2010
- Sp2/sp3 transform (beautiful TEM images), Banhart, Ajayan, Nature 1996
Defect engineering sp2- disc, cone, tube, – Thomas Ebbesen
- Sp2 carbon lattice- substitution and segregation, eg boron, Blasé PRL. 99,
Part 1: CNT, from basic science to applications
- Endo, Strano and Ajayan on“application of nanotubes”, science and application of CNT, speinger, dresslhaus
- Battery, composite …
- Talapatra, Natue nano, 2006, aligned CNT
Small change in morphology, , big difference of functionality
- Cao, Sicence 2005, Pushparajj, nature nano, 2007
- CNT brush contact, 2009 Adv Mat, Ajayan
- Ge, Nanoletter, 2010, Adhesion of compliant nanohairs
Carbon extremes- darkest material to transparent films
CNT cables and fibers
- Jinquan Wei, 2011, best conductivity of CNTS fibers –coper 5e6, carbon 1e5
Boron doping make CNT lots of junctions, 3D architectures
Part 2: 2D material
- Graphene and hBN,
- Controlled cutting of grapheme, Ci- Nanoresearch, 2008
- CVD using liquid precursors, i.e. Hexane
- Stainless steel,
- Gullaapalli, 2011 , directely for battery electrode
- In-planbe multifunctional thin film devices- supercap, Yooand Balakrishnan,
- Chem, Soc. Review, 2009, 38, 2520-2531- Carbon based supercapacitors
- S/N/P doping, Wei, nanoletters, 2009
2D hybrid carbon, HBN carbon
- Ci, Nature material 9, 430, 2010
- Angel Rubia, Nature Material, 2010
- Ci, Nature Materials, 9, 430, 2010, 2D h=BNC sheet
- Metal-metal transition? Li, unpublished yet
- Elatic properties, Science 2008, Columbia
- BN, phase digram, Solozhenko, J.Pyhyis Chem, B, 103, 2903, 1999
Part 3. Hybrid nanostructures
Fully-functinal nanostructures
- Interfacial slippage: dample, Suhr. Nature Materials 2005
- 3D composite, Veedu, Nature Mat 2006
- SWNT-polymer nanocomposite fibers,
- Self-stiffening, Carey, ACS Nano, 2011
- Fung APL 2007, comles heterostructures with nanocarbons
- Ou, Nanoletter 2008 reconfigrurable assembly
- Supcap, PNAS,Ajayan, , 3D nanostructure
- Gowda, electrochemical devices on nanowire
Challenges:
- Self-assemblied nanotibe stctures,
- 3D assembly, (LbL, with field to overcome barrier in suspension mixed
- Hybrid nanowires
- Nanowelding
- …
Funding Sources:
- Onr, nsf, nirt, dmr
- ARL, ARO
- AFRL
- DoE, NIH, Advanced energy consortium
- Nanoholdings Inc…