Thursday, March 26, 2009

Muscle like carbon nanotubes

Aliev et al. (from Baughman lab at UT Dallas) reported artificial muscles from carbon nanotubes. When applied voltage (5 kV), carbon nanotubes expanded in the same direction (see Figure). What's even more exciting is that they observed almost no change when they swinged at temperatures between 80 K and 1500 K! And the tubes are found to diffract light in a certain direction, opening up optical applications. Cool stuff.




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Monday, March 9, 2009

Heartland Institute challenges global warming claims




Steve Ralls calls it "Change, coming from the heartland".

Newsblaze caught a good point:"EU President Says Environmentalists Want to Command Human Behavior".


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Tuesday, February 24, 2009

Does open access increase scientific involvement?

If you spent your entire life on promoting "Open Access" for academic journals, you won't like this.

Contrary to the common belief, James Evans and Jacob Reimer reports that the effect of free access to the increase in citations from poor countries is more modest than you think, only 8%. Some of their conclusions like this one are even more troubling for open access lovers: "most researchers (even in the developing world - nt) rely on institutional subscriptions".

Maybe this quote from the study answers your questions that start with "why": "The influence of OA was more than twice as strong in the developing world but was less apparent in the very poorest countries where electronic access is limited".


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Monday, February 23, 2009

New form of Boron and Conan O'Brien

It's not that Boron has only four true crystal structures that makes it interesting, the real deal is at the fact that Boron is very hard to predict. It disobeys all the rules of periodic table. Artem Oganov from State University of New York at Stony Brook discovered a never observed allotrope of boron just recently and this may not be the last one.

Ken Chang wrote about this and mistakenly mentioned three forms not including the study he was writing about. He corrected it soon after but it was long enough to get caught by Conan O'Brien.

Check out the video on Conan's take on the matter.


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Wednesday, February 11, 2009

8 nm Au Ag nano alloys for CO oxidation

Dr. Sun did it again!
There wasn't an easy way to make gold and silver nano scale alloys (especially at the sizes of 8-9 nm) until Dr. Shouheng Sun and Dr. Chao Wang's work appeared in chemistry of materials just yesterday. The method shines with its simplicty: one pot, mix silver nitrate (AgNO3) with oleylamine, heat it to 100 oC, inject HAuCl4, heat more at 120 oC for 30 more minutes. How simpler can it get? Results are stunning (see the figure); you can also tune the composition to your taste. The only issue is they couldn't prove that these alloys survive CO oxidation without any sintering. I think this is the reason they published a communication. Let's wait for the fully loaded beauty.


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Wednesday, January 28, 2009

Growth of PS beads on gold nanocrystals

Ohnuma et al. (Xia group at Washington U. St. Louis) presents a beautiful way of dressing up gold nanocrystals with polystyrene (PS) polymer. They start the polymerization and then introduce the gold (50 nm) nanocrystals at a magic time, 2 minutes after the initiation. 30 minutes had 50 % success for gold embedding and 0 minutes had multiple gold cores in PS particles (in all cases PS size was around 300 nm with somewhat round shape). I wonder if plasmonic resonance played a role in the growth of the PS. As they promised to publish a mechanistic paper, we'll have to wait.


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Wednesday, December 10, 2008

Modifying hirsch index and impact factor for graduate students and untenured: Academic Impact Index (AII)

Hirsch index seems to be working better for senior or semi-senior professors. The untenured and yet to be graduated (e.g. grad students) are not easy to track in h-index. In other words, h-index is not that sensitive below 5.

Here's a suggestion for an academic impact index (AII):

Your AII = Total [(journal impact factor + times cited)x n]

n=1 if you are not the first, second or corresponding author
n=1.5 if you are the second author
n=2 if you are the first and/or corresponding author

For example, the 5th year chemistry graduate student Jack Sparrow has 3 journal papers (peer reviewed). His Chemistry of Materials paper has 4 citations, Advanced Materials has 11 and JACS (second author) has none because it's just come out.

His AII = (4.883 + 4)x2 + (8.191 + 11)x2 + (7.885 + 0)x1.5 = 67.976 = 68

So Mr. Sparrow's Academic Impact Index (AII) is 68.

Notes:
1. If there is no data for a journal's impact factor then put "0" for impact factor.

Advantages of this method:
1. Everything counts
2. The level of authorship matters (i.e. first, second or corresponding)
3. The journal you are publishing in is important
4. Any newly published papers have an immediate impact on your score


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Monday, November 24, 2008

CO2 activation by Copper (I) complexes

Ohishi et al. (from Hou group at Riken Research, Japan) reported facile CO2 activation by CuCl and N-heterocyclic carbene ligands. Organoboron complexes get the insertion of the CO2 and produce carboxylic acid counterpart by loosing the boron group. Their method is very efficient (over %90 conversion most cases) and the other functional groups on the structure seems little or not affected. The only downside is that you have to use little more than stochiometric (or in some cases twice as much) base (tBuOK) and similar amounts of acid (HCl) to get the reaction going.
Good job though.


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Tuesday, November 18, 2008

Jennifer Love from british columbia on catalysis

She talked about hydrosulfurization and Pt asissted C-F activation. Very exciting stuff and an excellent speaker I must say.


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Monday, November 10, 2008

Nobel Laurate Yuan T. Lee's talk


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Tuesday, November 4, 2008

Center for Environmental Implications of Nanotechnology

UCSB's Arturo Keller introduced the Center for Environmental Implications of Nanotechnology (CEIN). This 25 million dollar center is funded by NSF and will bring a significant contribution to nano toxicology.


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Thursday, October 23, 2008

Low Temperature SWNT by Sakthi Kumar

Imagine that you can synthesize single wall carbon nanotubes at 280 oC! That's precisely what dr. Sakthi Kumar from toyo university, Japan did. They used CoTPP and plasma evaporation. They patented all right in 2006 but they're still trying hard to convince Nature Nanotechnology editors to be accepted for a publication. What a drag. I would send it to JACS or something.


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Thursday, October 16, 2008

Open call to Nobel Foundation to establish a Nobel prize in Biology

Alfred Nobel (1833-1896)Image via WikipediaThe 2008 Nobel Chemistry prize has gone to another biological discovery.

Isn't it already time for a Nobel prize in Biology (or Molecular Biology)?

How long will the chemists suffer to see their prizes going to their biologist friends?

Is it fair that Chemistry, Physics, Medicine has their prizes and Biology not?

Who decides to establish another Nobel prize?

Stop this torture! Free the chemists!

UPDATE: It seems like I am not alone.


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Tuesday, October 14, 2008

World's top universities by Times Higher Education

2007 RANK 2006 RANK NAME COUNTRY PEER REVIEW SCORE EMPLOYER REVIEW SCORE STAFF/STUDENT SCORE CITATIONS/STAFF SCORE INTERNATIONAL STAFF SCORE INTERNATIONAL STUDENT SCORE OVERAL SCORE
1 1 Harvard University US 100 100 96 100 87 81 100
2 2= Yale University US 100 100 100 98 89 71 99.8
3 2= University of Cambridge UK 100 100 99 89 98 95 99.5
4 2= University of Oxford UK 100 100 100 85 96 96 98.9
5 7= California Institute of Technology US 100 74 98 100 100 93 98.6
6 5 Imperial College London UK 99 100 100 83 98 100 98.4
7 9 University College London UK 96 99 100 89 96 100 98.1
8 7= University of Chicago US 100 99 98 91 78 83 98.0
9 10 Massachusetts Institute of Technology US 100 100 90 100 33 94 96.7
10 11 Columbia University US 100 99 98 94 29 89 96.3
11 14 University of Pennsylvania US 97 98 88 99 83 79 96.1
12 6 Princeton University US 100 98 75 100 91 82 95.7
13= 13 Duke University US 97 98 100 94 30 66 94.4
13= 15 Johns Hopkins University US 99 78 100 100 30 68 94.4
15 20= Cornell University US 100 99 90 96 28 76 94.3
16 16 Australian National University Australia 100 93 82 74 99 91 92.0
17 19 Stanford University US 100 100 67 100 26 87 91.2
18 38= University of Michigan US 99 99 85 84 59 51 91.0
19 17 University of Tokyo Japan 100 94 98 78 27 40 90.0
20 12 McGill University Canada 100 97 99 51 62 95 89.7.

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Wednesday, October 8, 2008

Most cited articles in Chemistry of Materials

Chemistry of Materials (2007 impact factor 4.883) announced their 20 most cited papers and the top two came from Galen D. Stucky (my post doc advisor) and Vicki L. Colvin (my phd advisor):

  1. Surfactant Control of Phases in the Synthesis of Mesoporous Silica-Based Materials
    Huo, Q.; Margolese, D. I.; Stucky, G. D.
    Chem. Mater.;(Article); 1996; 8(5);1147-1160. DOI: 10.1021/cm960137h
  2. Single-Crystal Colloidal Multilayers of Controlled Thickness
    Jiang, P.; Bertone, J. F.; Hwang, K. S.; Colvin, V. L.
    Chem. Mater.;(Article); 1999; 11(8);2132-2140. DOI: 10.1021/cm990080+
# 14 is also from Stucky group:
Block Copolymer Templating Syntheses of Mesoporous Metal Oxides with Large Ordering Lengths and Semicrystalline Framework
Yang, P.; Zhao, D.; Margolese, D. I.; Chmelka, B. F.; Stucky, G. D.
Chem. Mater.;(Article); 1999; 11(10);2813-2826. DOI: 10.1021/cm990185c

#9's first author is Dr. Weiyong Yu, who we worked together at Colvin group as a postdoc:
Experimental Determination of the Extinction Coefficient of CdTe, CdSe and CdS Nanocrystals.
Yu, W. W.; Qu, L.; Guo, W.; Peng, X.
Chem. Mater.;(Addition/Correction)2004; 16(3);560-560. 10.1021/cm033007z


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Tuesday, October 7, 2008

2008 Nobel Prize in Physics goes to Japanese

2008 Nobel prize in Physics went to Yoichiro Nambu, Makoto Kobayashi and Toshihide Maskawa. Last year it was Germans and this year Japanese. Next year I'd like to Russian. Oh I forgot why they got the prize; for their subatomic and quark discoveries. Very nice.


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Monday, October 6, 2008

2008 Nobel Prize in Medicine

This year's, 2008 Nobel Prize in Medicine was announced earlier today and went to Harald zur Hausen, Françoise Barré-Sinoussi, Luc Montagnier. Harald gets a half for his cervical cancer discovery. Françoise and Luc gets the other half by their discovery of HIV.


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Friday, October 3, 2008

2008 Faculty positions in Materials & Chemistry

Here's an assortment of nano, chemistry and material science faculty positions available in the US. Thanks to MRS, C&EN and other job websites.

Ball State University Assistant Professor
Baylor University Asst/ Assoc Professor Environmental Science
Boston University ASSISTANT PROFESSOR OF ORGANIC CHEMISTRY
Brigham Young University Continuing Faculty Status Track Position
Brigham Young University CONTINUING FACULTY STATUS TRACK POSITION
Brown University Faculty Position, Nanoscience Chemistry
C.E.N. Tenure-Track Position
California Institute of Technology CHEMICAL ENGINEER
California Institute of Technology CHEMICAL PHYSICS
California Institute of Technology BIOCHEMISTRY or MOLECULAR BIOPHYSICS
Carnegie Mellon University Research Faculty Position, Department of Materials Science and Engineering
Carnegie Mellon University Faculty Position, Department of Chemistry
College of Staten Island Asst Prof of Interdisciplinary Scientific Comp
Columbia University Assistant or Associate Professor
Dow Corning Corporation MECHANICAL ENGINEERING FACULTY POSITIONS
Drexel University Faculty Position, Department of Materials Science and Engineering
Duke University Assistant Professor
Florida State University TENURE-TRACK FACULTY POSITIONS
Florida State University THEORETICAL OR QUANTUM CHEMISTRY
Florida State University THEORETICAL OR QUANTUM CHEMISTRY
Harvard University Assistant Professor Positions, School of Engineering and Applied Sciences
Harvard University ASSISTANT PROFESSORSHIP IN CHEMISTRY
Idaho State University Analytical or Inorganic Chemistry
Illinois Institute of Technology Tenured-Track Faculty Position
Illinois State University Assistant Professor - Analytical Chemistry
Indiana University-Purdue University FACULTY POSITIONS--CHEMISTRY & CHEMICAL BIOLOGY
Indiana University-Purdue University FACULTY POSITION IN ORGANIC CHEMISTRY
Kennesaw State University TENURE TRACK POSITION IN CHEMISTRY EDUCATION
Louisiana State University ASSISTANT/ ASSOCIATE/ FULL PROFESSOR
Loyola University Chicago Assistant or Associate Professor
Loyola University Chicago Biochemistry
Miami University FACULTY POSITION IN BIOPHYSICAL CHEMISTRY
Miami University FACULTY POSITION IN CHEMISTRY EDUCATION
Michigan State University Faculty Positions, Materials Science and Engineering
Michigan State University MATERIALS CHEMISTRY AND/ OR CHEMICAL ENGINEERING
Middle Tennessee State University Analytical Chemistry
Mississippi State University ASSISTANT PROFESSOR PARF #4216
Mississippi State University TENURE-TRACK INORGANIC FACULTY POSITION
Mississippi State University TENURE-TRACK PHYSICAL CHEMISTRY FACULTY POSITION
Mississippi State University TENURE-TRACK ORGANIC CHEMISTRY FACULTY POSITIONS
New Jersey Institute of Technology Assistant Professor in Synthetic Organic Chemistry
New Mexico Institute of Mining & Technology Materials and Metallurgical Engineering Department
New York University Senior Faculty Position, Department of Chemistry, Molecular Design Institute
New York University Assistant Professor
New York University SENIOR FACULTY POSITION
North Dakota State University Director, Center for Nanoscale Science and Engineering
North Dakota State University Positions Available, Center for Nanoscale Energy Related Materials
Northeastern Illinois University Assistant Professor in Environmental Chemistry
Northern Arizona University ANALYTICAL CHEMISTRY FACULTY POSITION
Oregon Health & Science University Chemical Biology/ Medical Research
Oregon State University ORGANIC CHEMISTRY
Oregon State University ORGANIC CHEMISTRY
Oregon State University PHYSICAL/ MATERIALS CHEMISTRY
Oregon State University ANALYTICAL CHEMISTRY
Oregon State University ORGANIC CHEMISTRY
Oregon State University ASSISTANT PROFESSOR ORGANIC CHEMISTRY
Oregon State University ASSISTANT PROFESSOR PHYSICAL/ MATERIALS CHEMISTRY
Oregon State University ASSISTANT PROFESSOR ANALYTICAL CHEMISTRY
Portland State University Open rank Professor in Enviornmental Chemistry
Purdue University CHEMICAL ENGINEERING
Queens College/CUNY Organic Chemistry
Rice University Tenure-track Faculty Position
Rice University Tenure-Track Position
Rochester Institute of Technology FACULTY POSITION, BIOCHEMISTRY
Rutgers, The State University of New Jersey Faculty Positions, Advanced Materials and Nanotechnology
Rutgers, The State University of New Jersey Dean, School of Engineering
Rutgers, The State University of New Jersey Tenure Track Faculty - Environmental Sci & Engin
Rutgers, the State University of New Jersey Tenure-Track Faculty Positions
Saint Peter's College Faculty Positions
South Dakota State University Assistant Professor
Southern Illinois University Carbondale Tenure Track Faculty Positions
Southern Methodist University DEPARTMENT CHAIR
Stevens Institute of Technology Tenure-Track Faculty Position, Chemical Engineering and Materials Science
Stony Brook University ASSISTANT PROFESSOR - Organic Chemistry
Temple University Full/ Associate/ Assistant Professor Tenure/ Tenure
Temple University Tenure Track Faculty
Texas A&M University Associate and Full Professor Positions, Department of Biomedical Engineering
Texas A&M University Assistant or Associate Professor Positions
Texas A&M University Tenure-track Faculty Positions
Texas Christian University Assistant Professor
Texas State University-San Marcos Faculty Positions, Electrical Engineering
Texas Tech University Analytical Chemistry
Texas Tech University TEXAS TECH UNIVERSITY
The Ohio State University Tenure-track Faculty Positions
The Pennsylvania State University ASSISTANT PROFESSOR OF BIOENGINEERING
The Pennsylvania State University TENURE-TRACK FACULTY POSITION
The Pennsylvania State University TENURE-TRACK FACULTY POSITION
The University of Akron Associate Dean for Research, College of Polymer Science and Polymer Engineering and Director of the Institute of Polymer Science and Polymer Engineering
The University of Chicago ASSISTANT PROFESSOR
The University of Texas at Dallas Faculty Positions, Materials Science and Engineering
The University of Texas at San Antonio ASSISTANT PROFESSORS OF CHEMISTRY
The University of Texas at San Antonio CHEMICAL EDUCATION FACULTY POSITION
The University of Texas at San Antonio ASSOCIATE/ FULL PROFESSOR--NANOMATERIALS
The University of Toledo Assistant Professor of Chemical Engineering
The University of Virginia Faculty Postion, Experimental Condensed Matter Physics
Towson University Assistant Professor, Analytical Forensic Chemistry
Tufts University ASSISTANT PROFESSORS
University of Akron Assistant Professor of Biochemistry
University of Boulder Theoretical Chemistry
University of California Berkeley Faculty Position in Chemistry
University of California Irvine FACULTY POSITION IN INORGANIC CHEMISTRY
University of California Merced FACULTY POSITIONS IN CHEMISTRY
University of California, San Diego Faculty Position, Department of Mechanical and Aerospace Engineering
University of California, San Diego Tenure-track or Tenured Faculty Positions
University of California, San Francisco TENURE TRACK POSITION
University of California, Santa Barbara ORGANIC CHEMISTRY
University of Central Florida Faculty Positions, NanoScience Technology Center
University of Colorado Boulder NANOSCIENCE
University of Connecticut Faculty Postions, School of Engineering
University of Delaware Assistant/ Associate Professor(s) Chem. Engineering
University of Florida Tenure Track Faculty Position
University of Illinois at Urbana-Champaign Faculty Positions, Department of Materials Science and Engineering
University of Iowa - Department of Chemistry Assistant Prof. of Organic or Inorganic Chemistry
University of Iowa - Department of Chemistry Assistant Professor of Analytical Chemistry
University of Kentucky Faculty Positions, Department of Chemical and Materials Engineering
University of Massachusetts Amherst Faculty Position in Inorganic & Physical Chemistry
University of Memphis Tenure-track Faculty Position
University of Michigan Faculty Position in Chemical Biology
University of Minnesota Assistant/ Associate Professor, Flavor Chemistry
University of Minnesota Chemical Engineering & Materials Science
University of Minnesota College of Pharmacy Asst/ Assoc Professor - Drug/ Device Combinations
University of Minnesota—Twin Cities 3M Harry Heltzer Multidisciplinary Chair in Science and Technology
University of Nebraska Assistant or Associate Professor
University of New Orleans FACULTY POSITION IN BIOANALYTICAL CHEMISTRY
University of North Dakota Faculty Position
University of Notre Dame BIOCHEMISTRY AND BIOPHYSICS FACULTY POSITIONS
University of Oregon Organic Chemistry Faculty Position
University of Pennsylvania Faculty Positions, Department of Materials Science and Engineering
University of Pennsylvania Faculty Position in Chemistry
University of San Diego Professor of Chemistry and Biochemistry
University of South Carolina Assistant Professor Positions, Polymer Nanotechnology
University of Southern California Faculty Positions, Polymers and Biopolymers
University of Southern Mississippi Tenure Track Position
University of Southern Mississippi Assistant or Associate Professor
University of Tennessee ASSISTANT PROFESSOR
University of Texas El Paso ROBERT A. WELCH CHAIR IN CHEMISTRY
University of Texas San Marcos Materials Chemistry
University of Texas Southwestern Medical Center Faculty Position in Organic Chemistry
University of Toledo Assistant/ Associate Professor
University of Utah Tenure-Track Position, Department of Electrical and Computer Engineering
University of Utah Tenure-track Positions
University of Utah Tenure-Track Positions
University of Virginia Assistant Professor of Chemistry
University of Virginia Assistant Professor of Chemistry
University of Washington FACULTY POSITIONS
University of Washington FACULTY POSITIONS
University of Wisconsin Drug Discovery and Drug Delivery
University of Wisconsin FACULTY POSITION
University of Wisconsin Materials Science
University of Wisconsin Eau Claire OPEN SEARCHÂ
University of Wisconsin-La Crosse TWO FACULTY POSITIONS IN CHEMISTRY
University of Wisconsin–Madison Faculty Positions, Materials Science and Engineering
University of Wyoming INORGANIC CHEMISTRY
Utah State University ASSISTANT PROFESSOR
Vanderbilt University Tenure-Track Faculty Position
Wake Forest University Faculty Positons, Condensed Matter Physics
Wake Forest University ORGANIC CHEMISTRY
Washington University in St. Louis Multiple Positions
Wayne State University NANOMATERIALS CHEMISTRY
Wayne State University INORGANIC CHEMISTRY FACULTY POSITION
Wayne State University THEORETICAL AND EXPERIMENTAL PHYSICAL CHEMISTRY
Wesleyan University Experimental Chemistry/ Material Science
Wesleyan University Faculty Positions in Biochemistry and Cell Biology
Western Washington University Faculty Positons, Advanced Materials Science and Engineering Center


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Thursday, October 2, 2008

Robust Gold Nanoparticles

I'd never think there would be new ways to make gold nanoparticles. Especially more robust. We know well that gold likes to get involved with other stuff in a solution. But Dong et al. (from Matyjaszewski group at Carnegie Mellon) showed that they can form the nanoparticles with a thick robust shell right out of the pot. They even heated the solutions up to 110 oC! And yet their nano gold didn't lose their surface plasmon resonance (just compare the left -the usual- and right -theirs- in the figure posted here). Pretty amazing.


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Tuesday, September 30, 2008

DNA Scaffolding - An emerging template chemistry at nanoscale

DNA scaffolding is getting hotter everyday. Aldaye et al. (from Sleiman group at McGill) crafted a remarkable review in this week's issue of Science. Three names are visual in this area: Paul Alivisatos of Berkeley (especially for their 1D DNA scaffolds), Richard Kiehl of Minnesota (click here for their Nano Letters paper on 2D DNA templates), Hao Yan of Arizona State (again 2D) and Ned Seeman of NYU (another 2D DNA scaffolding).


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