Abstract
In this work, self-catalytic growth of zinc oxide (ZnO) nanostructures on silicon nanowires (Si NWs) was studied using a vapor transport and condensation (VTC) method. ZnO seeded Si NWs were used as a base for the growth of ZnO nanostructure branches. We investigated the changes in morphologies of the ZnO nanostructures by varying the average size of the ZnO seeds and ZnO evaporation time. Our observations showed that the larger ZnO seeds are energetically more stable in promoting growth of ZnO nanorods (NRs) along the [0001] direction (c-axis). Increase in ZnO evaporation time lengthens the ZnO NRs, however, results in non-uniform diameter along the NRs due to irregular supply and precipitation of ZnO vapors on the non-polar surfaces of the NRs. The mechanisms of the seed size-dependent growth and time-dependent growth of ZnO nanostructures on Si NWs base were addressed. The hierarchical oriented Si/ZnO heterostructure NWs revealed interesting optical properties, among which, an enhancement in near band edge emission and suppression in optical reflection of the Si NWs.
| Original language | English |
|---|---|
| Pages (from-to) | 782-792 |
| Number of pages | 11 |
| Journal | Science of Advanced Materials |
| Volume | 6 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Apr 2014 |
Fingerprint
Keywords
- Hierarchical
- Nanowires
- Optical
- Silicon
- Zinc oxide
ASJC Scopus subject areas
- Materials Science(all)
Cite this
Hierarchical-oriented Si/ZnO heterostructured nanowires. / Chong, Su Kong; Lim, Eng Liang; Yap, Chi Chin; Chiu, Wee Siong; Dee, Chang Fu; Rahman, Saadah Abdul.
In: Science of Advanced Materials, Vol. 6, No. 4, 04.2014, p. 782-792.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hierarchical-oriented Si/ZnO heterostructured nanowires
AU - Chong, Su Kong
AU - Lim, Eng Liang
AU - Yap, Chi Chin
AU - Chiu, Wee Siong
AU - Dee, Chang Fu
AU - Rahman, Saadah Abdul
PY - 2014/4
Y1 - 2014/4
N2 - In this work, self-catalytic growth of zinc oxide (ZnO) nanostructures on silicon nanowires (Si NWs) was studied using a vapor transport and condensation (VTC) method. ZnO seeded Si NWs were used as a base for the growth of ZnO nanostructure branches. We investigated the changes in morphologies of the ZnO nanostructures by varying the average size of the ZnO seeds and ZnO evaporation time. Our observations showed that the larger ZnO seeds are energetically more stable in promoting growth of ZnO nanorods (NRs) along the [0001] direction (c-axis). Increase in ZnO evaporation time lengthens the ZnO NRs, however, results in non-uniform diameter along the NRs due to irregular supply and precipitation of ZnO vapors on the non-polar surfaces of the NRs. The mechanisms of the seed size-dependent growth and time-dependent growth of ZnO nanostructures on Si NWs base were addressed. The hierarchical oriented Si/ZnO heterostructure NWs revealed interesting optical properties, among which, an enhancement in near band edge emission and suppression in optical reflection of the Si NWs.
AB - In this work, self-catalytic growth of zinc oxide (ZnO) nanostructures on silicon nanowires (Si NWs) was studied using a vapor transport and condensation (VTC) method. ZnO seeded Si NWs were used as a base for the growth of ZnO nanostructure branches. We investigated the changes in morphologies of the ZnO nanostructures by varying the average size of the ZnO seeds and ZnO evaporation time. Our observations showed that the larger ZnO seeds are energetically more stable in promoting growth of ZnO nanorods (NRs) along the [0001] direction (c-axis). Increase in ZnO evaporation time lengthens the ZnO NRs, however, results in non-uniform diameter along the NRs due to irregular supply and precipitation of ZnO vapors on the non-polar surfaces of the NRs. The mechanisms of the seed size-dependent growth and time-dependent growth of ZnO nanostructures on Si NWs base were addressed. The hierarchical oriented Si/ZnO heterostructure NWs revealed interesting optical properties, among which, an enhancement in near band edge emission and suppression in optical reflection of the Si NWs.
KW - Hierarchical
KW - Nanowires
KW - Optical
KW - Silicon
KW - Zinc oxide
UR - http://www.scopus.com/inward/record.url?scp=84894587072&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84894587072&partnerID=8YFLogxK
U2 - 10.1166/sam.2014.1768
DO - 10.1166/sam.2014.1768
M3 - Article
AN - SCOPUS:84894587072
VL - 6
SP - 782
EP - 792
JO - Science of Advanced Materials
JF - Science of Advanced Materials
SN - 1947-2935
IS - 4
ER -