User:Madeleine Y. Bee/Notebook/CHEM-571 2013F/2013/08/28: Difference between revisions
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Execute procedures from from [http://openwetware.org/wiki/User:Matt_Hartings/Notebook/AU_Biomaterials_Design_Lab/2013/08/28 Dr Harting's AU Biomaterials Design Lab Notebook] | Execute procedures from from [http://openwetware.org/wiki/User:Matt_Hartings/Notebook/AU_Biomaterials_Design_Lab/2013/08/28 Dr Harting's AU Biomaterials Design Lab Notebook] | ||
===Procedures | ===Procedures=== | ||
====BSA-AuNP Procedure==== | ====BSA-AuNP Procedure==== | ||
[HAuCl<sub>4</sub>]=2.54nM<br.> | [HAuCl<sub>4</sub>]=2.54nM<br.> | ||
[BSA]=15.6μM<br.> | [BSA]=15.6μM<br.> | ||
Final [HAuCl<sub>4</sub>]: 90x [BSA]→15.6μM×90=1404μM=1.404mM=final [HAuCl<sub>4</sub>]<br.> | |||
<br.> | |||
(2.54mM HAuCl<sub>4</sub> initial)(1mL solution)=(1.404mM HAuCl<sub>4</sub> final)(V)<br.> | (2.54mM HAuCl<sub>4</sub> initial)(1mL solution)=(1.404mM HAuCl<sub>4</sub> final)(V)<br.> | ||
V=1.809mL BSA<br.> | V=1.809mL BSA<br.> | ||
<br.> | |||
Combine 1mL HAuCl<sub>4</sub> with 1.810mL BSA.<br.> | Combine 1mL HAuCl<sub>4</sub> with 1.810mL BSA.<br.> | ||
<br.> | |||
Rest of procedure followed as written. | Rest of procedure followed as written. | ||
====Citrate-AuNP Procedure==== | ====Citrate-AuNP Procedure==== | ||
[HAuCl<sub>4</sub>]=0.249Mm<BR.> | [HAuCl<sub>4</sub>]=0.249Mm<BR.> | ||
Sodium citrate=1.01%<br.> | Sodium citrate=1.01%<br.> | ||
<br.> | |||
Rest of procedure followed as written.<br.> | Rest of procedure followed as written.<br.> | ||
Final volume AuNPs: | <br.> | ||
Final volume AuNPs: 25.6mL<br.> | |||
<br.> | |||
Absorbance measurements taken of 10x diluted solution AuNPs rather than original sample concentration.<br.> | Absorbance measurements taken of 10x diluted solution AuNPs rather than original sample concentration.<br.> | ||
===Data=== | ===Data=== | ||
[[Image:2013_0828_citrate_AuNPs.png]]<br.> | |||
Absorbance spectra for AuNPs synthesized by citrate reduction.<br.> | Absorbance spectra for AuNPs synthesized by citrate reduction.<br.> | ||
*Relevant wavelengths and absorption: | |||
**λ<sub>spr</sub>=518.5nm<br.> | |||
**A<sub>spr</sub>=0.143<br.> | |||
λ<sub>spr</sub>=518.5nm<br.> | **A<sub>450</sub>=0.091<br.> | ||
A<sub>spr</sub>=0.143<br.> | **A<sub>spr</sub>/A<sub>450</sub>=0.143/0.091=1.57<br.> | ||
A<sub>450</sub>=0.091<br.> | *According to the Supporting Information from [http://pubs.acs.org/doi/suppl/10.1021/ac0702084/suppl_file/ac0702084si20070321_014144.pdf 'Determination of Size and Concentration of Gold Nanoparticles from UV/vis Spectra']:<br.> | ||
A<sub>spr</sub>/A<sub>450</sub>=0.143/0.091=1.57<br.> | **AuNP diameter=12nm<br.> | ||
According to the Supporting Information from [http://pubs.acs.org/doi/suppl/10.1021/ac0702084/suppl_file/ac0702084si20070321_014144.pdf 'Determination of Size and Concentration of Gold Nanoparticles from UV/vis Spectra']:<br.> | **ε<sub>450</sub> for 12nm AuNPs=1.09E+08<br.> | ||
AuNP diameter=12nm<br.> | *Using Beer's Law to calculate concentration:<br.> | ||
ε<sub>450</sub> for 12nm AuNPs=1.09E+08<br.> | **C=8.349E-10M or 0.8349nM<br.> | ||
Using Beer's Law to calculate concentration:<br.> | *Accounting for the 10x dilution factor used in taking absorbance measurements:<br.> | ||
C= | **C=8.349nM<br.> | ||
Accounting for the 10x dilution factor used in taking absorbance measurements:<br.> | |||
C= | |||
Revision as of 10:26, 16 October 2013
Experimental Biological Chemistry: Fall 2013 | <html><img src="/images/9/94/Report.png" border="0" /></html> Main project page Next entry<html><img src="/images/5/5c/Resultset_next.png" border="0" /></html> |
August 28, 2013ObjectiveExecute procedures from from Dr Harting's AU Biomaterials Design Lab Notebook ProceduresBSA-AuNP Procedure[HAuCl4]=2.54nM<br.> [BSA]=15.6μM<br.> Final [HAuCl4]: 90x [BSA]→15.6μM×90=1404μM=1.404mM=final [HAuCl4]<br.> <br.> (2.54mM HAuCl4 initial)(1mL solution)=(1.404mM HAuCl4 final)(V)<br.> V=1.809mL BSA<br.> <br.> Combine 1mL HAuCl4 with 1.810mL BSA.<br.> <br.> Rest of procedure followed as written. Citrate-AuNP Procedure[HAuCl4]=0.249Mm<BR.> Sodium citrate=1.01%<br.> <br.> Rest of procedure followed as written.<br.> <br.> Final volume AuNPs: 25.6mL<br.> <br.> Absorbance measurements taken of 10x diluted solution AuNPs rather than original sample concentration.<br.> Data<br.> Absorbance spectra for AuNPs synthesized by citrate reduction.<br.>
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