Processing Parameters for the Formation of Luminescent Porous Silicon Nanostructures. S.NO ORIEN TATION
RESSISTIVITY
1
(100)
0.8-1.2,mΩ cm-1
P++
200mA/cm 2 50mA/cm2 400mA/cm 2
200s 300s 150s
3:1(v/v) 48 %HF in ethanol
2
(100)
0.005 Ω/cm
P++
320mA/cm 2
6s
2:5 (v/v) 49%HF in ethanol
0.75-0.95Ω /cm
P++
74mA/cm2
180s
24% ethanolic HF
P++
37mA/cm2
1hrs
3
---------
DOPIN G
CURRENT
TIME
HF CONCENTRATION
24% ethanolic HF, Constant
0.010 Ω/cm
replacement each 20min 4
(100)
0.008–0.02 Ω /cm
P++
5mA/cm2 (Under white light)
1-2 min
25%HF/Ethanol
5
(100)
0.65-0.95 Ω /cm
P++
8.5 mA/cm2 (under white light)
90s and 120s
1:1 49%HF/EtOH
P++ (100)
0.65-0.95 Ω /cm
7.6 mA/ cm2
90sec
6
24% HF/26% H2O/50%
7
(100)
3-6 Ω/cm
120s 75.9 mA/cm2
P++
44mA/cm2
(Deferent time intervals with varying kind of illumination) 2min
25%HF in ethanol
8
(100)
0.008-0.020 Ω /cm
P++
74mA/cm2 (Under illuminatio n)
3 min
1:1 aqua HF in ethanol
9
(100)
0.64 Ω/cm
P++
4 mA/cm2 & 40 mA/cm2
30mi n 5min
1:1 aqua HF in ethanol
10
(100)
0.70 Ω/cm
P++
71.4 mA.cm2 (Under illuminatio n)
3 min
1:1 aqua HF in EtOH
REFFERANCE 1. Park.H.J,Bhatiya.N.S,Sailor.M.J, Biodegradable luminescent porous silicon nanoparticles for in vivo applications, Nat.Nanotech 2;2009, AOP 2. Tasciotti.E,Liu.X, et al, Mesoporous silicon particles as a multistage delivery system for imaging and therapeutic applications, Nat. Nanotech, 3, 2008, 151-157 3. Stewert.M.P, Robbins.E.G, Et al, three methods for the surface modification of mesoporous silicon, Phys.Sta.Sol.(a),182,2000:109-155 4. Guibin Jiang et al., Preparation of a biochip on porous silicon and application for label-free detection of small molecule-protein interactions Rapid Commun. Mass Spectrom. 2007; 21: 1277–1281 5. Buriak. J.M, et al., Hydride Abstraction Initiated Hydrosilylation of Terminal Alkenes and Alkynes on Porous Silicon Langmuir 2002, 18, 29712974 6. Buriak J.M., Exciton-Mediated Hydrosilylation on Photoluminescent Nanocrystalline Silicon J. Am. Chem. Soc. 2001, 123, 7821-7830 7. S.P. Low et al. Evaluation of mammalian cell adhesion on surfacemodified porous silicon Biomaterials 27 (2006) 4538–4546 8. Choi and Buriak ., Effects of Organic Monolayer Formation on Electrochemiluminescence Behavior of Porous Silicon, Chem. Mater., 12, 8, 2000
9. Sailor M.J., Using Porous Silicon as a Hydrogenating Agent: Derivatization of the Surface of Luminescent Nanocrystalline Silicon with BenzoquinoneJ. Am. Chem. Soc. 1997, 119, 6943-6944 10. Buriak J.M., M.J. Allen, Photoluminescence of porous silicon surfaces stabilized through Lewis acid mediated hydrosilylation Journal of Luminescence 80, 1999, 29--35